brian lang - Page 190 - Developer IT

capturing video from ip camera

- by Ruby

I am trying to capture video from ip camera into my application , its giving exception com.sun.image.codec.jpeg.ImageFormatException: Not a JPEG file: starts with 0x0d 0x0a at sun.awt.image.codec.JPEGImageDecoderImpl.readJPEGStream(Native Method) at sun.awt.image.codec.JPEGImageDecoderImpl.decodeAsBufferedImage(Unknown Source) at test.AxisCamera1.readJPG(AxisCamera1.java:130) at test.AxisCamera1.readMJPGStream(AxisCamera1.java:121) at test.AxisCamera1.readStream(AxisCamera1.java:100) at test.AxisCamera1.run(AxisCamera1.java:171) at java.lang.Thread.run(Unknown Source) its giving exception at image = decoder.decodeAsBufferedImage(); Here is the code i am trying private static final long serialVersionUID = 1L; public boolean useMJPGStream = true; public String jpgURL = "http://ip here/video.cgi/jpg/image.cgi?resolution=640×480"; public String mjpgURL = "http://ip here /video.cgi/mjpg/video.cgi?resolution=640×480"; DataInputStream dis; private BufferedImage image = null; public Dimension imageSize = null; public boolean connected = false; private boolean initCompleted = false; HttpURLConnection huc = null; Component parent; /** Creates a new instance of AxisCamera */ public AxisCamera1(Component parent_) { parent = parent_; } public void connect() { try { URL u = new URL(useMJPGStream ? mjpgURL : jpgURL); huc = (HttpURLConnection) u.openConnection(); // System.out.println(huc.getContentType()); InputStream is = huc.getInputStream(); connected = true; BufferedInputStream bis = new BufferedInputStream(is); dis = new DataInputStream(bis); if (!initCompleted) initDisplay(); } catch (IOException e) { // incase no connection exists wait and try // again, instead of printing the error try { huc.disconnect(); Thread.sleep(60); } catch (InterruptedException ie) { huc.disconnect(); connect(); } connect(); } catch (Exception e) { ; } } public void initDisplay() { // setup the display if (useMJPGStream) readMJPGStream(); else { readJPG(); disconnect(); } imageSize = new Dimension(image.getWidth(this), image.getHeight(this)); setPreferredSize(imageSize); parent.setSize(imageSize); parent.validate(); initCompleted = true; } public void disconnect() { try { if (connected) { dis.close(); connected = false; } } catch (Exception e) { ; } } public void paint(Graphics g) { // used to set the image on the panel if (image != null) g.drawImage(image, 0, 0, this); } public void readStream() { // the basic method to continuously read the // stream try { if (useMJPGStream) { while (true) { readMJPGStream(); parent.repaint(); } } else { while (true) { connect(); readJPG(); parent.repaint(); disconnect(); } } } catch (Exception e) { ; } } public void readMJPGStream() { // preprocess the mjpg stream to remove the // mjpg encapsulation readLine(3, dis); // discard the first 3 lines readJPG(); readLine(2, dis); // discard the last two lines } public void readJPG() { // read the embedded jpeg image try { JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(dis); image = decoder.decodeAsBufferedImage(); } catch (Exception e) { e.printStackTrace(); disconnect(); } } public void readLine(int n, DataInputStream dis) { // used to strip out the // header lines for (int i = 0; i < n; i++) { readLine(dis); } } public void readLine(DataInputStream dis) { try { boolean end = false; String lineEnd = "\n"; // assumes that the end of the line is marked // with this byte[] lineEndBytes = lineEnd.getBytes(); byte[] byteBuf = new byte[lineEndBytes.length]; while (!end) { dis.read(byteBuf, 0, lineEndBytes.length); String t = new String(byteBuf); System.out.print(t); // uncomment if you want to see what the // lines actually look like if (t.equals(lineEnd)) end = true; } } catch (Exception e) { e.printStackTrace(); } } public void run() { System.out.println("in Run..................."); connect(); readStream(); } @SuppressWarnings("deprecation") public static void main(String[] args) { JFrame jframe = new JFrame(); jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); AxisCamera1 axPanel = new AxisCamera1(jframe); new Thread(axPanel).start(); jframe.getContentPane().add(axPanel); jframe.pack(); jframe.show(); } } Any suggestions what I am doing wrong here??

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Prim's MST algorithm implementation with Java

- by user1290164

I'm trying to write a program that'll find the MST of a given undirected weighted graph with Kruskal's and Prim's algorithms. I've successfully implemented Kruskal's algorithm in the program, but I'm having trouble with Prim's. To be more precise, I can't figure out how to actually build the Prim function so that it'll iterate through all the vertices in the graph. I'm getting some IndexOutOfBoundsException errors during program execution. I'm not sure how much information is needed for others to get the idea of what I have done so far, but hopefully there won't be too much useless information. This is what I have so far: I have a Graph, Edge and a Vertex class. Vertex class mostly just an information storage that contains the name (number) of the vertex. Edge class can create a new Edge that has gets parameters (Vertex start, Vertex end, int edgeWeight). The class has methods to return the usual info like start vertex, end vertex and the weight. Graph class reads data from a text file and adds new Edges to an ArrayList. The text file also tells us how many vertecis the graph has, and that gets stored too. In the Graph class, I have a Prim() -method that's supposed to calculate the MST: public ArrayList<Edge> Prim(Graph G) { ArrayList<Edge> edges = G.graph; // Copies the ArrayList with all edges in it. ArrayList<Edge> MST = new ArrayList<Edge>(); Random rnd = new Random(); Vertex startingVertex = edges.get(rnd.nextInt(G.returnVertexCount())).returnStartingVertex(); // This is just to randomize the starting vertex. // This is supposed to be the main loop to find the MST, but this is probably horribly wrong.. while (MST.size() < returnVertexCount()) { Edge e = findClosestNeighbour(startingVertex); MST.add(e); visited.add(e.returnStartingVertex()); visited.add(e.returnEndingVertex()); edges.remove(e); } return MST; } The method findClosesNeighbour() looks like this: public Edge findClosestNeighbour(Vertex v) { ArrayList<Edge> neighbours = new ArrayList<Edge>(); ArrayList<Edge> edges = graph; for (int i = 0; i < edges.size() -1; ++i) { if (edges.get(i).endPoint() == s.returnVertexID() && !visited(edges.get(i).returnEndingVertex())) { neighbours.add(edges.get(i)); } } return neighbours.get(0); // This is the minimum weight edge in the list. } ArrayList<Vertex> visited and ArrayList<Edges> graph get constructed when creating a new graph. Visited() -method is simply a boolean check to see if ArrayList visited contains the Vertex we're thinking about moving to. I tested the findClosestNeighbour() independantly and it seemed to be working but if someone finds something wrong with it then that feedback is welcome also. Mainly though as I mentioned my problem is with actually building the main loop in the Prim() -method, and if there's any additional info needed I'm happy to provide it. Thank you. Edit: To clarify what my train of thought with the Prim() method is. What I want to do is first randomize the starting point in the graph. After that, I will find the closest neighbor to that starting point. Then we'll add the edge connecting those two points to the MST, and also add the vertices to the visited list for checking later, so that we won't form any loops in the graph. Here's the error that gets thrown: Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 at java.util.ArrayList.rangeCheck(Unknown Source) at java.util.ArrayList.get(Unknown Source) at Graph.findClosestNeighbour(graph.java:203) at Graph.Prim(graph.java:179) at MST.main(MST.java:49) Line 203: return neighbour.get(0); in findClosestNeighbour() Line 179: Edge e = findClosestNeighbour(startingVertex); in Prim()

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JSF2 - Why does render response not rerender component setting?

- by fekete-kamosh

From the tutorial: "If the request is a postback and errors were encountered during the apply request values phase, process validations phase, or update model values phase, the original page is rendered during Render response phase" (http://java.sun.com/javaee/5/docs/tutorial/doc/bnaqq.html) Does it mean that if view is restored in "Restore View" phase and then any apply request/validation/update model phase fails and skips to "Render response" that Render response only passes restored view without any changes to client? Managed Bean: package cz.test; import javax.faces.bean.ManagedBean; import javax.faces.bean.RequestScoped; @ManagedBean @RequestScoped public class TesterBean { // Simple DataStore (in real world EJB) private static String storedSomeValue = null; private String someValue; public TesterBean() { } public String storeValue() { storedSomeValue = someValue; return "index"; } public String eraseValue() { storedSomeValue = null; return "index"; } public String getSomeValue() { someValue = storedSomeValue; return someValue; } public void setSomeValue(String someValue) { this.someValue = someValue; } } Composite component: <?xml version='1.0' encoding='ISO-8859-1' ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:composite="http://java.sun.com/jsf/composite" xmlns:c="http://java.sun.com/jsp/jstl/core">  <composite:interface> <composite:attribute name="currentBehaviour" type="java.lang.String" required="true"/> <composite:attribute name="fieldValue" required="true"/> </composite:interface>  <composite:implementation> <h:panelGrid columns="3"> <c:choose> <c:when test="#{cc.attrs.currentBehaviour == 'READONLY'}" > <h:outputText id="fieldValue" value="#{cc.attrs.fieldValue}"> </h:outputText> </c:when> <c:when test="#{cc.attrs.currentBehaviour == 'MANDATORY'}" > <h:inputText id="fieldValue" value="#{cc.attrs.fieldValue}" required="true"> <f:attribute name="requiredMessage" value="Field is mandatory"/> <c:if test="#{empty cc.attrs.fieldValue}"> <f:attribute name="style" value="background-color: yellow;"/> </c:if> </h:inputText> * </c:when> <c:when test="#{cc.attrs.currentBehaviour == 'OPTIONAL'}" > <h:inputText id="fieldValue" value="#{cc.attrs.fieldValue}"> </h:inputText> </c:when> </c:choose> <h:message for="fieldValue" style="color:red;" /> </h:panelGrid> </composite:implementation> Page: <?xml version='1.0' encoding='UTF-8' ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:ez="http://java.sun.com/jsf/composite/components"> <h:head> <title>Testing page</title> </h:head> <h:body> <h:form> <h:outputText value="Some value:"/> <ez:field-component currentBehaviour="MANDATORY" fieldValue="#{testerBean.someValue}"/> <h:commandButton value="Store" action="#{testerBean.storeValue}"/> <h:commandButton value="Erase" action="#{testerBean.eraseValue}" immediate="true"/> </h:form> <br/><br/> <b>Why is field's background color not set to yellow?</b> <ol> <li>NOTICE: Field has yellow background color (mandatory field with no value)</li> <li>Fill in any value (eg. "Hello") and press Store</li> <li>NOTICE: Yellow background disappeared (as mandatory field has value)</li> <li>Clear text in the field and press Store</li> <li><b>QUESTION: Why is field's background color not set to yellow?</b></li> <li>Press Erase</li> <li>NOTICE: Field has yellow background color (mandatory field with no value)</li> </ol> </h:body>

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Android ksoap nested soap objects in request gives error in response

- by Smalesy

I'm trying to do the following soap request on Android using KSOAP. It contains a list of nested soap objects. However, I must be doing something wrong as I get an error back. The request I am trying to generate is as follows: <?xml version="1.0" encoding="utf-8"?> <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"> <soap12:Body> <SetAttendanceMarks xmlns="http://hostname.net/"> <strSessionToken>string</strSessionToken> <LessonMarks> <Count>int</Count> <LessonMarks> <LessonMark> <StudentId>int</StudentId> <EventInstanceId>int</EventInstanceId> <Mark>string</Mark> </LessonMark> <LessonMark> <StudentId>int</StudentId> <EventInstanceId>int</EventInstanceId> <Mark>string</Mark> </LessonMark> </LessonMarks> </LessonMarks> </SetAttendanceMarks> </soap12:Body> </soap12:Envelope> My code is as follows: public boolean setAttendanceMarks(List<Mark> list) throws Exception { boolean result = false; String methodName = "SetAttendanceMarks"; String soapAction = getHost() + "SetAttendanceMarks"; SoapObject lessMarksN = new SoapObject(getHost(), "LessonMarks"); for (Mark m : list) { PropertyInfo smProp =new PropertyInfo(); smProp.setName("LessonMark"); smProp.setValue(m); smProp.setType(Mark.class); lessMarksN.addProperty(smProp); } PropertyInfo cProp =new PropertyInfo(); cProp.setName("Count"); cProp.setValue(list.size()); cProp.setType(Integer.class); SoapObject lessMarks = new SoapObject(getHost(), "LessonMarks"); lessMarks.addProperty(cProp); lessMarks.addSoapObject(lessMarksN); PropertyInfo sProp =new PropertyInfo(); sProp.setName("strSessionToken"); sProp.setValue(mSession); sProp.setType(String.class); SoapObject request = new SoapObject(getHost(), methodName); request.addProperty(sProp); request.addSoapObject(lessMarks); SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12); envelope.dotNet = true; envelope.setOutputSoapObject(request); HttpTransportSE androidHttpTransport = new HttpTransportSE(getURL()); androidHttpTransport.debug = true; androidHttpTransport.call(soapAction, envelope); String a = androidHttpTransport.requestDump; String b = androidHttpTransport.responseDump; SoapObject resultsRequestSOAP = (SoapObject) envelope.bodyIn; SoapObject res = (SoapObject) resultsRequestSOAP.getProperty(0); String resultStr = res.getPropertyAsString("Result"); if (resultStr.contentEquals("OK")) { result = true; } return result; } The error I get is as follows: <?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <soap:Body> <soap:Fault> <soap:Code> <soap:Value>soap:Sender</soap:Value> </soap:Code> <soap:Reason> <soap:Text xml:lang="en">Server was unable to read request. ---> There is an error in XML document (1, 383). ---> The specified type was not recognized: name='LessonMarks', namespace='http://gsdregapp.net/', at <LessonMarks xmlns='http://gsdregapp.net/'>.</soap:Text> </soap:Reason> <soap:Detail /> </soap:Fault> </soap:Body> </soap:Envelope> Can anybody tell me what I am doing wrong? I will be most grateful for any assistance!

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jQuery toggle fucntion not working as expected

- by Bunny Rabbit

<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js" type="text/javascript"></script> <script type="text/javascript"> $(function(){ $('div#menu div') .bind('mouseover',function(event){ popHelp(this); }) .bind('mouseout',function(event){ clearHelp(); }) .toggle( function(event){$('#menu div a').not(this).css('opacity',1);$(event.target).css('opacity',0.4)}, function(event){$(event.target).css('opacity',1)} ) $('div.item').not('#mainPage') .hide() $('#customerManagement').click(function(event){ $('.item').hide('slow'); $('#customerManagementCon').toggle('slow'); return false; }) $('#userManagement').click(function(){ $('.item').hide('slow'); $('#userManagementCon').toggle('slow'); return false; }) $('#storageManagement').click(function(){ $('.item').hide('slow'); $('#storageManagementCon').toggle('slow'); return false; }) $('#searchManagement').click(function(){ $('.item').hide('slow'); $('#searchManagementCon').toggle('slow'); return false; }) $('#signOff').click(function(){ $('.item').hide('slow'); $('#signOffCon').toggle('slow'); return false; }) } ); function popHelp(ref){ var text; if(ref.id=="customerManagement") text="click here for customer management"; else if(ref.id=="userManagement") text="click here for user management"; else if(ref.id=="storageManagement") text="click here for storage management"; else if(ref.id=="searchManagement") text="search management"; else if(ref.id=="signOff") text="click here to sign off"; $('#helpConsole').append('<div class="help">'+text+'<div>'); } function clearHelp(){ $('#helpConsole > div').remove(); } </script> <style type="text/css" > #helpConsole { background-color:Aqua; margin-left:500px; width:300px; height:100px; outline-width:medium; } </style> </head> <body> <div id="menu"> <table border="2"> <thead> <tr> <th colspan="5">Welcome $Employee Name</th> </tr> </thead> <tbody> <tr> <td><div id="customerManagement" class="menuItem"><a>Customer Management</a></div></td> <td><div id="userManagement" class="menuItem"><a>User Management</a></div></td> <td><div id="storageManagement" class="menuItem"><a>Storage Management</a></div></td> <td><div id="searchManagement" class="menuItem"><a>Search Management</a></div></td> <td><div id="signOff" class="menuItem"><a>Sign Off</a></div></td> </tr> </tbody> </table> </div> <div id="helpConsole"><h3>help</h3></div> <div id="mainPage" class="item"><h1>Storage Service</h1></div> <div id="customerManagementCon" class="item"> <h3>Customer Management</h3> </div> <div id="userManagementCon" class="item"> <h3>User Management</h3> </div> <div id="storageManagementCon" class="item"> <h3>Storage Management</h3> </div> <div id="searchManagementCon" class="item"> <h3>Search Mangement</h3> </div> <div id="signOffCon" class="item"> <h3>Sign Off</h3> </div> <div id="menuItemCon" class="item">menuItem</div> </body> The toggle function in this code is not working as expected though it shows the #menu items when clicked it doesn't hide them always .

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ClassCastException happens when I use maven with tomcat plugin

- by zjffdu

Hi all, I try to use maven with tomcat plugin to develop a simple web application. But When I invoke the servlet, ClassCastException happens, this is the error message: java.lang.ClassCastException: "com.snda.dw.moniter.LogQueryServlet cannot be to javax.servlet.Servlet" But I already make com.snda.dw.moniter.LogQueryServlet extends HttpServlet, it should can be cast to avax.servlet.Servlet. The following is my pom.xml http://maven.apache.org/maven-v4_0_0.xsd" 4.0.0 com.snda dw.moniter war 0.0.1-SNAPSHOT dw.moniter Maven Webapp http://maven.apache.org junit junit 3.8.1 test <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.4</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>r07</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.1</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-simple</artifactId> <version>1.6.1</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-core</artifactId> <version>0.20.2</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>com.snda</groupId> <artifactId>dw.common</artifactId> <version>1.0-SNAPSHOT</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>net.sf.flexjson</groupId> <artifactId>flexjson</artifactId> <version>2.1</version> <type>jar</type> <scope>compile</scope> </dependency> </dependencies> <build> <finalName>dw.moniter</finalName> <pluginManagement> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.5</source> <target>1.5</target> </configuration> </plugin> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>tomcat-maven-plugin</artifactId> <version>1.1</version> </plugin> <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>jetty-maven-plugin</artifactId> <version>8.0.0.M2</version> </plugin> </plugins> </pluginManagement> </build>

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Expression Web 4 - Master Page Error

- by Eric J.

I created an ASP.Net Web Application in VS 2010. That in turn creates an example Site.Master, Default.aspx, and several other example files. I then opened Default.aspx in Expression Web 4 and get the error message The Master Page file 'Site.Master' cannot be loaded. Default.aspx can still be displayed fine in VS 2010. Source.Master: <%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site.master.cs" Inherits="SampleWebApp.SiteMaster" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head runat="server"> <title></title> <link href="~/Styles/Site.css" rel="stylesheet" type="text/css" /> <asp:ContentPlaceHolder ID="HeadContent" runat="server"> </asp:ContentPlaceHolder> <style type="text/css"> .style1 { font-family: Tunga; } </style> </head> <body> <form runat="server"> <div class="page"> <div class="header"> <div class="title"> <h1 class="style1"> My Application Master Page</h1> </div> <div class="loginDisplay"> <asp:LoginView ID="HeadLoginView" runat="server" EnableViewState="false"> <AnonymousTemplate> [ <a href="~/Account/Login.aspx" ID="HeadLoginStatus" runat="server">Log In</a> ] </AnonymousTemplate> <LoggedInTemplate> Welcome <span class="bold"><asp:LoginName ID="HeadLoginName" runat="server" /></span>! [ <asp:LoginStatus ID="HeadLoginStatus" runat="server" LogoutAction="Redirect" LogoutText="Log Out" LogoutPageUrl="~/"/> ] </LoggedInTemplate> </asp:LoginView> </div> <div class="clear hideSkiplink"> <asp:Menu ID="NavigationMenu" runat="server" CssClass="menu" EnableViewState="false" IncludeStyleBlock="false" Orientation="Horizontal"> <Items> <asp:MenuItem NavigateUrl="~/Default.aspx" Text="Home"> <asp:MenuItem NavigateUrl="~/Home/NewItem.aspx" Text="New Item" Value="New Item"></asp:MenuItem> <asp:MenuItem NavigateUrl="~/Home/AnotherItem.aspx" Text="Another Item" Value="Another Item"></asp:MenuItem> </asp:MenuItem> <asp:MenuItem NavigateUrl="~/About.aspx" Text="About"/> <asp:MenuItem NavigateUrl="~/ContactUs.aspx" Text="ContactUs" Value="ContactUs"> </asp:MenuItem> </Items> </asp:Menu> </div> </div> <div class="main"> <asp:ContentPlaceHolder ID="MainContent" runat="server"/> </div> <div class="clear"> </div> </div> <div class="footer"> </div> </form> </body> </html> Default.aspx: <%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="SampleWebApp._Default" %> <asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent"> <style type="text/css"> .style2 { color: #669900; } .style3 { background-color: #FFFFCC; } </style> </asp:Content> <asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> <h2> Welcome to MY page! </h2> <p> To learn more <span class="style2"><strong><em><span class="style3">about</span></em></strong></span> ASP.NET visit <a href="http://www.asp.net" title="ASP.NET Website">www.asp.net</a>. </p> <p> You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&clcid=0x409" title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>. </p> </asp:Content> Any idea how to get the master page to work properly in Expression Web 4?

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2 columns 100% height. Can the problem ever be solved in html markup???!!

- by denja

I'm in despair trying to draw this simple thing. Two columns stretching 100% vertically. Is this ever possible? here there are two tries <html> <head> <title>Columns</title> </head> <body> <style type="text/css"> .wrapper {font-size:900px; width:1200px; margin:0 auto; } .col1 { width:600px; height:100%; float:left; background:#f00; } .col2 { width:600px; height:100%; float:left; background:#00f; } </style> <div class="wrapper"> <div class="col1"> C o l u m n 1 </div> <div class="col2"> C ol u m n 2 </div> </div> </body> </html> and <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-GB"> <head> <title>2 Column CSS Demo - Equal Height Columns with Cross-Browser CSS</title> <style media="screen" type="text/css"> /*  */ </style> </head> <body> <div id="container2"> <div id="container1"> <div id="col1"> aaaa a a a a a a a a a aa aa a a a a a a a a aa aa a a a a a a a a aa aa a a a a a a a aa a a a a aa aa a a a a a a a a aa aa a a a a a a a a aa aa a a a a aa a a a a aa aa a </div> <div id="col2"> fghdfghsfgddn fghdfghsfgddn fghdfghsfgddn fghdfghsfgddn fghdfghsfgddn fghdfghsfgddn fghdfghsfgddn v </div> </div> </div> <div id="footer">   </div> </body>

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Opacity in CSS, some doubts

- by André

Hi, I have some doubts with opacity in CSS. I have a Header and a Footer that uses opacity, but I would like to turn off opacity the opacity in the text. Is that possible? To a better understanding I will post the code. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title> stu nicholls | CSS PLaY | cross browser fixed header/footer layout basic method </title> <style type="text/css" media="screen"> #printhead {display:none;} html { height:100%; max-height:100%; padding:0; margin:0; border:0; background:#fff; font-size:80%; font-family: "trebuchet ms", tahoma, verdana, arial, sans-serif; /* hide overflow:hidden from IE5/Mac */ /* \*/ overflow: hidden; /* */ } body {height:100%; max-height:100%; overflow:hidden; padding:0; margin:0; border:0;} #content {display:block; height:100%; max-height:100%; overflow:hidden; padding-left:0px; position:relative; z-index:3; word-wrap:break-word;} #head {position:absolute; margin:0; top:0; right:18px; display:block; width:100%; height:1; background-color:transparent; font-size:1em; z-index:5; color:#000; border-bottom:1px solid #000;} #foot {position:absolute; margin:0; bottom:-1px; right:18px; display:block; width:100%; height:30px; background-color:transparent; color:#000; text-align:right; font-size:2em; z-index:4; border-top:1px solid #000;} .pad1 {display:block; width:18px; height:18px; float:left;} /* Com este "height", alinho a border do header */ .pad2 {display:block; height:100px;} .pad3 {display:block; height:0px;} /* Com este "height" controlo onde começa o content e o scroll do browser */ #content p {padding:5px;} .bold {font-size:1.2em; font-weight:bold;} .red {color:#c00; margin-left:5px; font-family:"trebuchet ms", "trebuchet", "verdana", sans-serif;} h2 {margin-left:5px;} h3 {margin-left:5px;} /* Esta classe controla as caracteristicas do background do footer e do header. */ .bkg { background-color: blue; filter:alpha(opacity=35); /* IE's opacity*/ opacity: 0.35; height: 10; } iframe { border-style: none; width: 100%; height: 100%; } </style> </head> <body> <div id="head"> <div class="bkg"> <div class="pad1"></div>Header </div> </div> <div id="content"> <div class="pad3"></div> <iframe src="http://www.yahoo.com" id="iFrame"></iframe> <div class="pad2"></div> </div> </div> <div id="foot"><div class="bkg">Footer</div></div> </body> </html> I want to maintain the opacity in the blue color in the footer and header but I would like to put the text stronger. Is that possible? Best Regards,

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Twitter Bootstrap Collapsible Navbar Duplicating

- by sixeightzero

I am working on a project using Twitter Bootstrap. One thing that I noticed is that my pages have duplicate navbars when they are defined as collapsible and the page is resized smaller. Here is the duplicate NavBar: Here is the normal width NavBar: Code: <!DOCTYPE html> <html lang="en">     <html class="no-js">  <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <title></title> <meta name="description" content=""> <meta name="viewport" content="width=device-width"> <link rel="stylesheet" href="/assets/css/bootstrap.css"> <style> body { padding-top: 60px; } </style> <link rel="stylesheet" href="/assets/css/bootstrap-responsive.min.css"> <link rel="stylesheet" href="/assets/css/main.css"> <script>window.jQuery || document.write('<script src="/assets/js/vendor/jquery-1.8.1.min.js"><\/script>')</script> <script src="/assets/js/vendor/modernizr-2.6.1-respond-1.1.0.min.js"></script> </head> <body class="dark">  <div class="navbar navbar-inverse navbar-fixed-top"> <div class="navbar-inner"> <div class="container"> <a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </a> <a class="brand" href="#">Project name</a> <div class="nav-collapse collapse"> <ul class="nav"> <li class="active"><a href="#">Home</a></li> <li><a href="#about">About</a></li> <li><a href="#contact">Contact</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li class="divider"></li> <li class="nav-header">Nav header</li> <li><a href="#">Separated link</a></li> <li><a href="#">One more separated link</a></li> </ul> </li> </ul> </div> </div> </div> </div> Has anyone else run into this and have some pointers?

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Can't create admin user on Heroku

- by Nick5a1

I am new to rails and I have gone through Kevin Skoglund's Ruby on Rails 3 Essential Training course on Lynda.com. Through the course you set up a simple cms, which I did. It doesn't cover Git or deployment but I've pushed my simple cms to github (https://github.com/nick5a1/Simple_CMS) and deployed to Heroku (http://nkarrasch.herokuapp.com/). In order to deploy to Heroku I followed the Heroku setup guide (https://devcenter.heroku.com/articles/rails3) and switched my database from MySQL to PostgreSQL. As instructed I changed gen'mysql2' to gen 'sqlite3' in my Gemfile and ran bundle install before pushing. I then ran heroku run rake db:migrate. I'm running into 2 problems. When I try to log in (http://nkarrasch.herokuapp.com/access) I get an error "We're sorry, but something went wrong". I should instead be getting a flash message with invalid username/password combination. This is what I'm getting on my test environment on my local machine. Secondly, when I log into the Heroku console to create and create an admin user, when I try to save that user I get the following error: irb(main):004:0> user.save (1.2ms) BEGIN AdminUser Exists (1.9ms) SELECT 1 AS one FROM "admin_users" WHERE "admin_users"."username" = 'Nick5a1' LIMIT 1 (1.7ms) ROLLBACK => false Any advice on how to troubleshoot would be greatly appreciated :). Thanks very much, Nick EDIT: Here are my Heroku logs: 2012-06-27T20:36:44+00:00 heroku[slugc]: Slug compilation started 2012-06-27T20:37:34+00:00 heroku[api]: Add shared-database:5mb add-on by [email protected] 2012-06-27T20:37:34+00:00 heroku[api]: Release v2 created by [email protected] 2012-06-27T20:37:34+00:00 heroku[api]: Add RAILS_ENV, LANG, PATH, RACK_ENV, GEM_PATH config by [email protected] 2012-06-27T20:37:34+00:00 heroku[api]: Release v3 created by [email protected] 2012-06-27T20:37:34+00:00 heroku[api]: Release v4 created by [email protected] 2012-06-27T20:37:34+00:00 heroku[api]: Deploy 1d82839 by [email protected] 2012-06-27T20:37:35+00:00 heroku[slugc]: Slug compilation finished 2012-06-27T20:37:36+00:00 heroku[web.1]: Starting process with command `bundle exec rails server -p 45450` 2012-06-27T20:37:40+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 2012-06-27T20:37:40+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 2012-06-27T20:37:40+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 2012-06-27T20:37:44+00:00 app[web.1]: => Rails 3.2.6 application starting in production on http://0.0.0.0:45450 2012-06-27T20:37:44+00:00 app[web.1]: => Call with -d to detach 2012-06-27T20:37:44+00:00 app[web.1]: => Booting WEBrick 2012-06-27T20:37:44+00:00 app[web.1]: Connecting to database specified by DATABASE_URL 2012-06-27T20:37:44+00:00 app[web.1]: => Ctrl-C to shutdown server 2012-06-27T20:37:44+00:00 app[web.1]: [2012-06-27 20:37:44] INFO WEBrick 1.3.1 2012-06-27T20:37:44+00:00 app[web.1]: [2012-06-27 20:37:44] INFO ruby 1.9.2 (2011-07-09) [x86_64-linux] 2012-06-27T20:37:44+00:00 app[web.1]: [2012-06-27 20:37:44] INFO WEBrick::HTTPServer#start: pid=2 port=45450 2012-06-27T20:37:45+00:00 heroku[web.1]: State changed from starting to up 2012-06-27T20:39:44+00:00 heroku[run.1]: Awaiting client 2012-06-27T20:39:44+00:00 heroku[run.1]: Starting process with command `bundle exec rake db:migrate` 2012-06-27T20:39:44+00:00 heroku[run.1]: State changed from starting to up 2012-06-27T20:39:51+00:00 heroku[run.1]: Process exited with status 0 2012-06-27T20:39:51+00:00 heroku[run.1]: State changed from up to complete 2012-06-27T20:41:05+00:00 heroku[run.1]: Awaiting client 2012-06-27T20:41:05+00:00 heroku[run.1]: Starting process with command `bundle exec rails console` 2012-06-27T20:41:05+00:00 heroku[run.1]: State changed from starting to up 2012-06-27T20:46:09+00:00 heroku[run.1]: Process exited with status 0 2012-06-27T20:46:09+00:00 heroku[run.1]: State changed from up to complete

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Service injection into Controller (Spring MVC)

- by ThaSaleni

Hi I have a Spring web application, I have built it up to the controller stage and I could inject my Daos, into my Services fine. Now when I want to inject my Service into my controller i get an error for dependency with the Dao and further down the sessionFactory. I don't want to inject these again cause this will ultimately lead me to eventually create a data source but I have my Daos for data access and they already know about sessionFactory. Am I missing something here? here's the sample code snippets My Service: @Service("productService") @Transactional public class ProductServiceImpl implements ProductService { private ProductDao productDao; @Autowired public void setDao(ProductDao productDao) { this.productDao = productDao; } My Controller @Controller @WebServlet(name="controllerServlet", loadOnStartup= urlPatterns=...}) public class ControllerServlet extends HttpServlet { boolean isUserLogedIn =false; @Autowired private ProductService productService; public void setProductService(ProductService productService){ this.productService = productService; } Servlet-context Stack trace javax.servlet.ServletException: Servlet.init() for servlet mvcServlet threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java: 565) org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1812) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) java.lang.Thread.run(Thread.java:662) root cause org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'controllerServlet': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.phumzile.acme.services.ProductService com.phumzile.acme.client.web.controller.ControllerServlet.productService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.phumzile.acme.services.ProductService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.p ostProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) SERVLET-CONTEXT <context:component-scan base-package="com.phumzile.acme.client" />  <mvc:annotation-driven /> </beans> APP-CONFIG <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>configuration.properties</value> </list> </property> </bean> <context:annotation-config/> <context:component-scan base-package="com.phumzile.acme" /> <import resource="db-config.xml" /> </beans> DB-CONFIG <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="idleConnectionTestPeriod" value="10800"/> <property name="maxIdleTime" value="21600"/> <property name="driverClass"> <value>${jdbc.driver.className}</value> </property> <property name="jdbcUrl"> <value>${jdbc.url}</value> </property> <property name="user"> <value>${jdbc.username}</value> </property> <property name="password"> <value>${jdbc.password}</value> </property> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.a nnotation.AnnotationSessionFactoryBean"> <property name="dataSource"> <ref bean="dataSource" /> </property> <property name="annotatedClasses"> <list>  <value>com.phumzile.acme.model.User</value> <value>com.phumzile.acme.model.Person</value> <value>com.phumzile.acme.model.Company</value> <value>com.phumzile.acme.model.Product</value> <value>com.phumzile.acme.model.Game</value> <value>com.phumzile.acme.model.Book</value>  </list> </property> <property name="packagesToScan" value="com.phumzile.acme" /> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">${jdbc.hibernate.dialect </prop> <prop key="hibernate.hbm2ddl.auto">validate</prop> <prop key="hibernate.show_sql">true</prop> </props> </property> </bean> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory"> <ref bean="sessionFactory" /> </property> </bean> <tx:annotation-driven /> </beans> CONFIGURATION.PROPERTIES jdbc.driver.className=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mydb jdbc.username=root jdbc.password=root jdbc.hibernate.dialect=org.hibernate.dialect.MySQLDialect

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Java Client-Server problem when sending multiple files

- by Jim

Client public void transferImage() { File file = new File(ServerStats.clientFolder); String[] files = file.list(); int numFiles = files.length; boolean done = false; BufferedInputStream bis; BufferedOutputStream bos; int num; byte[] byteArray; long count; long len; Socket socket = null ; while (!done){ try{ socket = new Socket(ServerStats.imgServerName,ServerStats.imgServerPort) ; InputStream inStream = socket.getInputStream() ; OutputStream outStream = socket.getOutputStream() ; System.out.println("Connected to : " + ServerStats.imgServerName); BufferedReader inm = new BufferedReader(new InputStreamReader(inStream)); PrintWriter out = new PrintWriter(outStream, true /* autoFlush */); for (int itor = 0; itor < numFiles; itor++) { String fileName = files[itor]; System.out.println("transfer: " + fileName); File sentFile = new File(fileName); len = sentFile.length(); len++; System.out.println(len); out.println(len); out.println(sentFile); //SENDFILE bis = new BufferedInputStream(new FileInputStream(fileName)); bos = new BufferedOutputStream(socket.getOutputStream( )); byteArray = new byte[1000000]; count = 0; while ( count < len ){ num = bis.read(byteArray); bos.write(byteArray,0,num); count++; } bos.close(); bis.close(); System.out.println("file done: " + itor); } done = true; }catch (Exception e) { System.err.println(e) ; } } } Server public static void main(String[] args) { BufferedInputStream bis; BufferedOutputStream bos; int num; File file = new File(ServerStats.serverFolder); if (!(file.exists())){ file.mkdir(); } try { int i = 1; ServerSocket socket = new ServerSocket(ServerStats.imgServerPort); Socket incoming = socket.accept(); System.out.println("Spawning " + i); try { try{ if (!(file.exists())){ file.mkdir(); } InputStream inStream = incoming.getInputStream(); OutputStream outStream = incoming.getOutputStream(); BufferedReader inm = new BufferedReader(new InputStreamReader(inStream)); PrintWriter out = new PrintWriter(outStream, true /* autoFlush */); String length2 = inm.readLine(); System.out.println(length2); String filename = inm.readLine(); System.out.println("Filename = " + filename); out.println("ACK: Filename received = " + filename); //RECIEVE and WRITE FILE byte[] receivedData = new byte[1000000]; bis = new BufferedInputStream(incoming.getInputStream()); bos = new BufferedOutputStream(new FileOutputStream(ServerStats.serverFolder + "/" + filename)); long length = (long)Integer.parseInt(length2); length++; long counter = 0; while (counter < length){ num = bis.read(receivedData); bos.write(receivedData,0,num); counter ++; } System.out.println(counter); bos.close(); bis.close(); File receivedFile = new File(filename); long receivedLen = receivedFile.length(); out.println("ACK: Length of received file = " + receivedLen); } finally { incoming.close(); } } catch (IOException e){ e.printStackTrace(); } } catch (IOException e1){ e1.printStackTrace(); } } The code is some I found, and I have slightly modified it, but I am having problems transferring multiple images over the server. Output on Client: run ServerQueue.Client Connected to : localhost transfer: Picture 012.jpg 1312743 java.lang.ArrayIndexOutOfBoundsException Connected to : localhost transfer: Picture 012.jpg 1312743 Cant seem to get it to transfer multiple images. But bothsides I think crash or something because the file never finishes transfering

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Why I can't implement this simple CSS

- by nXqd

<!DOCTYPE html> <html lang="en"> <head> <title>Enjoy BluePrint</title> <link rel="stylesheet" href="css/blueprint/screen.css" type="text/css" media="screen, projection"> <link rel="stylesheet" href="css/blueprint/print.css" type="text/css" media="print">   <script type="text/css"> h1.logo { width:181px; height:181px; background: url("img/logo.png"); text-indent: -9999px; } </script> </head> <body> <div class="container">  <div id="header" class="span-24"> <div id="logo" class="span-6"> <h1 class="logo">This is my site</h1> </div> <div id="script" class="span-10"> <p>Frank Chimero is a graphic designer, illustrator, teac`her, maker, writer, thinker-at-large in Portland, Oregon.</p> </div> <div id="contact" class="span-8 last"> contact </div> </div>  <div id="main-content" class="span-12"> <h3>DISCOVERY</h3> <p>My fascination with the creative process, curiosity, and visual experience informs all of my work in some way. Each piece is the part of an exploration in finding wit, surprise, honesty, and joy in the world around us, then, trying to document those things with all deliberate speed before they vanish.</p><br/> <p>Our creative output can have a myriad intended outcomes: to inform, to persuade or sell, or delight. There are many other creative people who do well in servicing the needs to inform or persuade, but there are not many out there who have taken up the mantle of delighting people. I’ll try my best.</p><br/> <p>It’s not about pretty; it is about beauty. Beauty in form, sure, but also beauty in the fit of a bespoke idea that transcends not only the tasks outlined, but also fulfilling the objectives that caused the work to be produced in the first place.</p><br/> <p>The best creative work connects us by speaking to what we share. From that, we hope to make things that will last. Work made without staying power and lasting relevance leads to audiences that are fickle, strung along on a diet of crumbs.</p><br/> <p>The work should be nourishing in some way, both while a creative person is making it, but also while someone consumes it. When I think of all my favorite books, movies, art and albums, they all make me a little less alone and a little more sentient. Perhaps that is what making is for: to document the things that make us feel most alive.</p> </div>  <div id="award" class="span-4"> Awards </div> <div id="right-sidebar" class="span-8 last"> Right sidebar </div> </div> </body> </html> I'm 100% sure the code works, and I can't replace image at h1.logo . I try to use live-editing CSS tool and it works fine . Thanks for reading :)

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Image not loading onto JPanel?

- by None None

I have been trying to figure out how to add an image to a JPanel as a background, but still have complete control over the placing of JButtons, JLabels, and etc. This is one method I found, but it is crashing and not loading the image or buttons. Here is the code: import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JButton; import java.awt.BorderLayout; import java.awt.FlowLayout; import java.awt.GridLayout; public class PanelDemo extends JFrame { private static final long serialVersionUID = 1L; private JButton btn1 = new JButton("EASY"); private JButton btn2 = new JButton("MEDIUM"); private JButton btn3 = new JButton("HARD"); private JButton btn4 = new JButton("High Score"); public PanelDemo() { super("Image Panel Demo"); JPanel panel = new ImagePanel( new FlowLayout(FlowLayout.CENTER, 50, 180)); JPanel panelbtn = new JPanel(new GridLayout(4, 1)); btn1.setBackground(new java.awt.Color(0, 0, 0)); btn1.setFont(new java.awt.Font("Showcard Gothic", 1, 24)); btn1.setForeground(new java.awt.Color(0, 255, 102)); btn2.setBackground(new java.awt.Color(0, 0, 0)); btn2.setFont(new java.awt.Font("Showcard Gothic", 1, 24)); btn2.setForeground(new java.awt.Color(0, 255, 102)); btn3.setBackground(new java.awt.Color(0, 0, 0)); btn3.setFont(new java.awt.Font("Showcard Gothic", 1, 24)); btn3.setForeground(new java.awt.Color(0, 255, 102)); btn4.setBackground(new java.awt.Color(0, 0, 0)); btn4.setFont(new java.awt.Font("Showcard Gothic", 1, 24)); btn4.setForeground(new java.awt.Color(0, 255, 102)); panel.add(panelbtn); panelbtn.add(btn1); panelbtn.add(btn2); panelbtn.add(btn3); panelbtn.add(btn4); add(panel, BorderLayout.CENTER); setSize(640, 480); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public static void main(String... args) { new PanelDemo().setVisible(true); } } ImagePanel.java import java.awt.Graphics; import java.awt.Image; import java.awt.LayoutManager; import javax.swing.ImageIcon; import javax.swing.JPanel; public class ImagePanel extends JPanel { private static final long serialVersionUID = 1L; String imageFile = "/rsc/img/background.jpg"; public ImagePanel() { super(); } public ImagePanel(String image) { super(); this.imageFile = image; } public ImagePanel(LayoutManager layout) { super(layout); } public void paintComponent(Graphics g) { ImageIcon imageicon = new ImageIcon(getClass().getResource(imageFile)); Image image = imageicon.getImage(); super.paintComponent(g); if (image != null) g.drawImage(image, 0, 0, getWidth(), getHeight(), this); } } Error: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at javax.swing.ImageIcon.<init>(Unknown Source) at ImagePanel.paintComponent(ImagePanel.java:27) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at javax.swing.JLayeredPane.paint(Unknown Source) at javax.swing.JComponent.paintChildren(Unknown Source) at javax.swing.JComponent.paintToOffscreen(Unknown Source) at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source) at javax.swing.RepaintManager$PaintManager.paint(Unknown Source) at javax.swing.RepaintManager.paint(Unknown Source) at javax.swing.JComponent.paint(Unknown Source) at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source) at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source) at sun.awt.SunGraphicsCallback.runComponents(Unknown Source) at java.awt.Container.paint(Unknown Source) at java.awt.Window.paint(Unknown Source) at javax.swing.RepaintManager$3.run(Unknown Source) at javax.swing.RepaintManager$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source) at javax.swing.RepaintManager.access$1000(Unknown Source) at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$200(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Also, if anyone knows of a better way to put a background image on a JPanel, pease do tell. Thank you in advance.

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Unable to create application factory of class org.apache.wicket.spring.SpringWebApplicationFactory

- by theJava

org.apache.wicket.protocol.http.WebApplicationFactoryCreationException: Unable to create application factory of class org.apache.wicket.spring.SpringWebApplicationFactory at org.apache.wicket.protocol.http.WicketFilter.getApplicationFactory(WicketFilter.java:228) at org.apache.wicket.protocol.http.WicketFilter.init(WicketFilter.java:271) at org.apache.wicket.protocol.http.WicketFilter.init(WicketFilter.java:252) at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:713) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499) at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:115) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132) at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:454) at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:396) at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRunMojo.java:210) at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:107) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:195) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:140) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59) at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:314) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:151) at org.apache.maven.cli.MavenCli.execute(MavenCli.java:445) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:168) at org.apache.maven.cli.MavenCli.main(MavenCli.java:132) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352) 2010-12-28 14:51:46.213:INFO::Started [email protected]:8080 I am using Wicket 1.5 M3, Spring 3.0 and i am getting this error. Below is my Web.xml config. <?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <display-name>mysticpaste</display-name>  <filter> <filter-name>wicket.mysticpaste</filter-name> <filter-class> org.apache.wicket.protocol.http.WicketFilter </filter-class> <init-param> <param-name>applicationFactoryClassName</param-name> <param-value>org.apache.wicket.spring.SpringWebApplicationFactory</param-value> </init-param> </filter> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:com/mysticcoders/mysticpaste/spring/application-context.xml</param-value> </context-param> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <filter> <filter-name>wicket.session</filter-name> <filter-class>org.apache.wicket.protocol.http.servlet.WicketSessionFilter</filter-class> <init-param> <param-name>filterName</param-name> <param-value>wicket.mysticpaste</param-value> </init-param> </filter> <filter-mapping> <filter-name>wicket.session</filter-name> <url-pattern>/servlet/*</url-pattern> </filter-mapping> <filter> <filter-name>open.hibernate.session.in.view</filter-name> <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> </filter>  <filter-mapping> <filter-name>open.hibernate.session.in.view</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>

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HttpURLConnection! Connection.getInputStream is java.io.FileNotFoundException

- by user3643283

I created a method "UPLPAD2" to upload file to server. Splitting my file to packets(10MB). It's OK (100%). But when i call getInputStream, i get FileNotFoundException. I think, in loop, i make new HttpURLConnection to set "setRequestProperty". This is a problem. Here's my code: @SuppressLint("NewApi") public int upload2(URL url, String filePath, OnProgressUpdate progressCallBack, AtomicInteger cancelHandle) throws IOException { HttpURLConnection connection = null; InputStream fileStream = null; OutputStream out = null; InputStream in = null; HttpResponse response = new HttpResponse(); Log.e("Upload_Url_Util", url.getFile()); Log.e("Upload_FilePath_Util", filePath); long total = 0; try { // Write the request. // Read from filePath and upload to server (url) byte[] buf = new byte[1024]; fileStream = new FileInputStream(filePath); long lenghtOfFile = (new java.io.File(filePath)).length(); Log.e("LENGHT_Of_File", lenghtOfFile + ""); int totalPacket = 5 * 1024 * 1024; // 10 MB int totalChunk = (int) ((lenghtOfFile + (totalPacket - 1)) / totalPacket); String headerValue = ""; String contentLenght = ""; for (int i = 0; i < totalChunk; i++) { long from = i * totalPacket; long to = 0; if ((from + totalPacket) > lenghtOfFile) { to = lenghtOfFile; } else { to = (totalPacket * (i + 1)); } to = to - 1; headerValue = "bytes " + from + "-" + to + "/" + lenghtOfFile; contentLenght = "Content-Length:" + (to - from + 1); Log.e("Conten_LENGHT", contentLenght); connection = client.open(url); connection.setRequestMethod("POST"); connection.setRequestProperty("Content-Range", headerValue); connection.setRequestProperty("Content-Length", Long.toString(to - from + 1)); out = connection.getOutputStream(); Log.e("Lenght_Of_File", lenghtOfFile + ""); Log.e("Total_Packet", totalPacket + ""); Log.e("Total_Chunk", totalChunk + ""); Log.e("Header_Valure", headerValue); int read = 1; while (read > 0 && cancelHandle.intValue() == 0 && total < totalPacket * (i + 1)) { read = fileStream.read(buf); if (read > 0) { out.write(buf, 0, read); total += read; progressCallBack .onProgressUpdate((int) ((total * 100) / lenghtOfFile)); } } Log.e("TOTAL_", total + "------" + totalPacket * (i + 1)); Log.e("I_", i + ""); Log.e("LENGHT_Of_File", lenghtOfFile + ""); if (i < totalChunk - 1) { connection.disconnect(); } out.close(); } // Read the response. response.setHttpCode(connection.getResponseCode()); in = connection.getInputStream(); // I GET ERROR HERE. if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) { throw new IOException("Unexpected HTTP response: " + connection.getResponseCode() + " " + connection.getResponseMessage()); } byte[] body = readFully(in); response.setBody(body); response.setHeaderFields(connection.getHeaderFields()); if (cancelHandle.intValue() != 0) { return 1; } JSONObject jo = new JSONObject(response.getBodyAsString()); Log.e("Upload_Body_res_", response.getBodyAsString()); if (jo.has("error")) { if (jo.has("code")) { int errCode = jo.getInt("code"); Log.e("Upload_Had_errcode", errCode + ""); return errCode; } else { return 504; } } Log.e("RESPONE_BODY_UPLOAD", response.getBodyAsString() + ""); return 0; } catch (Exception e) { e.printStackTrace(); Log.e("Http_UpLoad_Response_Exception", e.toString()); response.setHttpCode(connection.getResponseCode()); Log.e("ErrorCode_Upload_Util_Return", response.getHttpCode() + ""); if (connection.getResponseCode() == 200) { return 1; } else if (connection.getResponseCode() == 0) { return 1; } else { return response.getHttpCode(); } // Log.e("ErrorCode_Upload_Util_Return", response.getHttpCode()+""); } finally { if (fileStream != null) fileStream.close(); if (out != null) out.close(); if (in != null) in.close(); } } And Logcat 06-12 09:39:29.558: W/System.err(30740): java.io.FileNotFoundException: http://download-f77c.fshare.vn/upload/NRHAwh+bUCxjUtcD4cn9xqkADpdL32AT9pZm7zaboHLwJHLxOPxUX9CQxOeBRgelkjeNM5XcK11M1V-x 06-12 09:39:29.558: W/System.err(30740): at com.squareup.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:187) 06-12 09:39:29.563: W/System.err(30740): at com.fsharemobile.client.HttpUtil.upload2(HttpUtil.java:383) 06-12 09:39:29.563: W/System.err(30740): at com.fsharemobile.fragments.ExplorerFragment$7$1.run(ExplorerFragment.java:992) 06-12 09:39:29.568: W/System.err(30740): at java.lang.Thread.run(Thread.java:856) 06-12 09:39:29.568: E/Http_UpLoad_Response_Exception(30740): java.io.FileNotFoundException: http://download-f77c.fshare.vn/upload/NRHAwh+bUCxjUtcD4cn9xqkADpdL32AT9pZm7zaboHLwJHLxOPxUX9CQxOeBRgelkjeNM5XcK11M1V-x

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Error 404 after change filter in web.xml

- by Falci

I'm trying to add Spring Security to the project. After adding a block of code in web.xml, all url's give 404. What is wrong? It's a Maven project, Spring MVC, hibernate, postgres. (I do not know what information is relevant to describe the scenario) <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/spring/root-context.xml</param-value> </context-param>  <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>  <servlet> <servlet-name>appServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>appServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>  <filter> <filter-name>springSecurityFilterChain</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSecurityFilterChain</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app> UPDATE: Grave: Exception starting filter springSecurityFilterChain org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'springSecurityFilterChain' is defined at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:529) at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1094) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:276) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1079) at org.springframework.web.filter.DelegatingFilterProxy.initDelegate(DelegatingFilterProxy.java:217) at org.springframework.web.filter.DelegatingFilterProxy.initFilterBean(DelegatingFilterProxy.java:145) at org.springframework.web.filter.GenericFilterBean.init(GenericFilterBean.java:179) at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4638) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5294) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1366) at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1454) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:295) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1379) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1537) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1547) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1526) at java.lang.Thread.run(Thread.java:722)

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Unexpected StackOverflowError in KeyListener

- by BillThePlatypus

I am writing a program that can write sets of questions for review to a file for another program to read. The possible answers are typed into JTextFields at the bottom. It has code to ensure that there won't bew more than one blank JTextField at the end. When I type in answers, at varying points it will throw a StackOverflowError. The stack trace: Exception in thread "AWT-EventQueue-0" java.lang.StackOverflowError at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:232) at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:232) at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:232) at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:232) and the code: package writer; import java.awt.BorderLayout; import java.awt.Font; import java.awt.FontMetrics; import java.awt.GridLayout; import java.awt.Insets; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.util.ArrayList; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JSplitPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.event.DocumentEvent; import javax.swing.event.DocumentListener; import main.QuestionSet; public class SetPanel extends JPanel implements KeyListener { private QuestionSet set; private WriterPanel writer; private JPanel top=new JPanel(new BorderLayout()),controls=new JPanel(new GridLayout(1,0)),answerPanel=new JPanel(new GridLayout(0,1)); private JSplitPane split; private JTextField title=new JTextField(); private JTextArea question=new JTextArea(); private ArrayList<JTextField> answers=new ArrayList<JTextField>(); public SetPanel(QuestionSet s,WriterPanel writer) { super(new BorderLayout()); top.add(controls,BorderLayout.PAGE_START); title.setFont(title.getFont().deriveFont(40f)); title.addKeyListener(new KeyListener(){ @Override public void keyTyped(KeyEvent e) { title.setText(WriterPanel.convertString(title.getText())); } @Override public void keyPressed(KeyEvent e) { title.setText(WriterPanel.convertString(title.getText())); } @Override public void keyReleased(KeyEvent e) { title.setText(WriterPanel.convertString(title.getText())); } }); title.getDocument().addDocumentListener(new DocumentListener(){ @Override public void insertUpdate(DocumentEvent e) { // TODO Auto-generated method stub fitTitle(); } @Override public void removeUpdate(DocumentEvent e) { // TODO Auto-generated method stub fitTitle(); } @Override public void changedUpdate(DocumentEvent e) { // TODO Auto-generated method stub fitTitle(); } }); top.add(title,BorderLayout.PAGE_END); this.add(top,BorderLayout.PAGE_START); question.setLineWrap(true); question.setWrapStyleWord(true); question.setFont(question.getFont().deriveFont(20f)); question.addKeyListener(new KeyListener(){ @Override public void keyTyped(KeyEvent e) { // TODO Auto-generated method stub question.setText(WriterPanel.convertString(question.getText())); } @Override public void keyPressed(KeyEvent e) { // TODO Auto-generated method stub question.setText(WriterPanel.convertString(question.getText())); } @Override public void keyReleased(KeyEvent e) { // TODO Auto-generated method stub question.setText(WriterPanel.convertString(question.getText())); }}); split=new JSplitPane(JSplitPane.VERTICAL_SPLIT,true,new JScrollPane(question),new JScrollPane(answerPanel)); split.setDividerLocation(150); this.add(split,BorderLayout.CENTER); answers.add(new JTextField()); answerPanel.add(answers.get(0)); answers.get(0).addKeyListener(this); } private void fitTitle() { if(title==null||title.getText().equals("")) return; //title.setText(WriterPanel.convertString(title.getText())); String text=title.getText(); Insets insets=title.getInsets(); int width=title.getWidth()-insets.left-insets.right; int height=title.getHeight()-insets.top-insets.bottom; Font root=title.getFont().deriveFont((float)height); FontMetrics m=title.getFontMetrics(root); if(m.stringWidth(text)<width) { title.setFont(title.getFont().deriveFont((float)height)); return; } float delta=-100; while(Math.abs(delta)>.1f) { m=title.getFontMetrics(root); int w=m.stringWidth(text); if(w==width) break; if(Math.signum(w-width)==Math.signum(delta)||root.getSize2D()+delta<0) { delta/=-10; continue; } root=root.deriveFont(root.getSize2D()+delta); } title.setFont(root); } private void fixAnswers() { //System.out.println(answers); while(answers.get(answers.size()-1).getText().equals("")&&answers.size()>1&&answers.get(answers.size()-2).getText().equals("")) removeAnswer(answers.size()-1); if(!answers.get(answers.size()-1).getText().equals("")) { answers.add(new JTextField()); answerPanel.add(answers.get(answers.size()-1)); answers.get(answers.size()-2).removeKeyListener(this); answerPanel.revalidate(); } answers.get(answers.size()-1).addKeyListener(this); } private void removeAnswer(int i) { answers.remove(i); answerPanel.remove(i); answerPanel.revalidate(); } @Override public void keyTyped(KeyEvent e) { // TODO Auto-generated method stub } @Override public void keyPressed(KeyEvent e) { // TODO Auto-generated method stub fixAnswers(); } @Override public void keyReleased(KeyEvent e) { // TODO Auto-generated method stub } } Thank you in advance for any help.

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Java Array Index Out of Bounds Exception

- by user1302023

I need help debugging the following program: I'm getting a run time error that reads: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1 at SearchEngine.main(SearchEngine.java:126) import java.util.*; import java.io.*; public class SearchEngine { public static int getNumberOfWords (File f) throws FileNotFoundException { int numWords = 0; Scanner scan = new Scanner(f); while (scan.hasNext()) { numWords++; scan.next(); } scan.close(); return numWords; } public static void readInWords (File input, String [] x) throws FileNotFoundException { Scanner scan = new Scanner(input); int i = 0; while (scan.hasNext() && i<x.length) { x[i] = scan.next(); i++; } scan.close(); } public static int getNumOfDistinctWords (File input, String [] x) throws FileNotFoundException { Scanner scan = new Scanner(input); int count = 0; int i = 1; while (scan.hasNext() && i<x.length) { if (!x[i].equals(x[i-1])) { count++; } i++; } scan.close(); return count; } public static void readInDistinctWords (String [] x, String [] y) { int i = 1; int k = 0; while (i<x.length) { if (!x[i].equals(x[i-1])) { y[k] = x[i]; k++; } i++; } } public static int getNumberOfLines (File input) throws FileNotFoundException { int numLines = 0; Scanner scan = new Scanner(input); while (scan.hasNextLine()) { numLines++; scan.nextLine(); } scan.close(); return numLines; } public static void readInLines (File input, String [] x) throws FileNotFoundException { Scanner scan = new Scanner(input); int i = 0; while (scan.hasNextLine() && i<x.length) { x[i] = scan.nextLine(); i++; } scan.close(); } public static void main(String [] args) { try { //gets file name System.out.println("Enter the name of the text file you wish to search"); Scanner kb = new Scanner(System.in); String fileName = kb.nextLine(); String TXT = ".txt"; if (!fileName.endsWith(TXT)) { fileName = fileName.concat(TXT); } File input = new File(fileName); //First part of creating index System.out.println("Creating vocabArray"); int NUM_WORDS = getNumberOfWords(input); //System.out.println(NUM_WORDS); String [] wordArray = new String[NUM_WORDS]; readInWords(input, wordArray); Arrays.sort(wordArray); int NUM_DISTINCT_WORDS = getNumOfDistinctWords(input, wordArray); String [] vocabArray = new String[NUM_DISTINCT_WORDS]; readInDistinctWords(wordArray, vocabArray); System.out.println("Finished creating vocabArray"); System.out.println("Creating concordanceArray"); int NUM_LINES = getNumberOfLines(input); String [] concordanceArray = new String[NUM_LINES]; readInLines(input, concordanceArray); System.out.println("Finished creating concordanceArray"); System.out.println("Creating invertedIndex"); int [][] invertedIndex = new int[NUM_DISTINCT_WORDS][10]; int [] wordCountArray = new int[NUM_DISTINCT_WORDS]; int lineNum = 0; while (lineNum<concordanceArray.length) { Scanner scan = new Scanner(concordanceArray[lineNum]); while (scan.hasNext()) { int wordPos = Arrays.binarySearch(vocabArray, scan.next()); wordCountArray[wordPos]+=1; for(int i = 0; i < invertedIndex.length; i++) { for(int j = 0; j < invertedIndex[i].length; j++) { if (invertedIndex[i][j] == 0) { invertedIndex[i][j] = lineNum; break; } } } } lineNum++; } System.out.println("Finished creating invertedIndex"); } catch (FileNotFoundException exception) { System.out.println("File Not Found"); } } //main } //class

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Android UnknownHost in asyncTask - loading web page

- by Sneha

I followed this tutorial for AsyncTask and getting the following error log: 03-23 11:44:42.936: WARN/System.err(315): java.net.UnknownHostException: www.google.co.in 03-23 11:44:42.936: WARN/System.err(315): at java.net.InetAddress.lookupHostByName(InetAddress.java:513) 03-23 11:44:42.936: WARN/System.err(315): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:278) 03-23 11:44:42.936: WARN/System.err(315): at java.net.InetAddress.getAllByName(InetAddress.java:242) 03-23 11:44:42.936: WARN/System.err(315): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:136) 03-23 11:44:42.936: WARN/System.err(315): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 03-23 11:44:42.936: WARN/System.err(315): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 03-23 11:44:42.936: WARN/System.err(315): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:348) 03-23 11:44:42.936: WARN/System.err(315): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 03-23 11:44:42.936: WARN/System.err(315): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 03-23 11:44:42.944: WARN/System.err(315): at org.apache.http.impl.client.AbstractHttpC lient.execute(AbstractHttpClient.java:465) 03-23 11:44:42.944: WARN/System.err(315): at com.test.async.AsyncTaskExampleActivity$DownloadWebPageTask.doInBackground (AsyncTaskExampleActivity.java:36) 03-23 11:44:42.944: WARN/System.err(315): at com.test.async.AsyncTaskExampleActivity$DownloadWebPageTask.doInBackground (AsyncTaskExampleActivity.java:1) 03-23 11:44:42.944: WARN/System.err(315): at android.os.AsyncTask$2.call(AsyncTask.java:185) 03-23 11:44:42.944: WARN/System.err(315): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 03-23 11:44:42.944: WARN/System.err(315): at java.util.concurrent.FutureTask.run (FutureTask.java:137) 03-23 11:44:42.944: WARN/System.err(315): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 03-23 11:44:42.944: WARN/System.err(315): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 03-23 11:44:42.944: WARN/System.err(315): at java.lang.Thread.run(Thread.java:1096) How do i fix it?? My Code: public class AsyncTaskExampleActivity extends Activity { private TextView textView; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); textView = (TextView) findViewById(R.id.TextView01); } private class DownloadWebPageTask extends AsyncTask<String, Void, String> { @Override protected String doInBackground(String... urls) { String response = ""; Log.i("", "in doInBackgroundddddddddd.........."); Log.i("", "in readWebpageeeeeeeeeeeee"); /* * try { InetAddress i = * InetAddress.getByName("http://google.co.in"); } catch * (UnknownHostException e1) { e1.printStackTrace(); } */ for (String url : urls) { Log.i("", "in for looooooop doInBackgroundddddddddd.........."); DefaultHttpClient client = new DefaultHttpClient(); HttpGet httpGet = new HttpGet(url); try { Log .i("", "afetr for looooooop try doInBackgroundddddddddd.........."); HttpResponse execute = client.execute(httpGet); Log .i("", "afetr for looooooop try client ..execute doInBackgroundddddddddd.........."); InputStream content = execute.getEntity().getContent(); BufferedReader buffer = new BufferedReader( new InputStreamReader(content)); String s = ""; while ((s = buffer.readLine()) != null) { response += s; Log .i("", "afetr while looooooop try client ..execute doInBackgroundddddddddd.........."); } } catch (Exception e) { e.printStackTrace(); } } Log .i("", "afetr lasttttttttttttt b4 response doInBackgroundddddddddd.........."); return response; } @Override protected void onPostExecute(String result) { Log.i("", "in onPostExecuteeee.........."); textView.setText(result); } } public void readWebpage(View view) { /* * System.setProperty("http.proxyHost", "10.132.116.10"); * System.setProperty("http.proxyPort", "3128"); */ DownloadWebPageTask task = new DownloadWebPageTask(); task.execute(new String[] { "http://google.co.in" }); Log.i("", "in readWebpageeeeeeeeeeeee after execute.........."); } } main.xml: <Button android:id="@+id/readWebpage" android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="readWebpage" android:text="Load Webpage"> </Button> <TextView android:id="@+id/TextView01" android:layout_width="match_parent" android:layout_height="match_parent" android:text="Example Text"> </TextView> Manifest: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.test.async" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="8" /> <uses-permission android:name="android.permission.INTERNET"></uses-permission> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".AsyncTaskExampleActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> Thanks Sneha

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Why my :hover aren't working?

- by user1628488

I have am nav, and when i hover some elements, the submenu should be displayed 'block', but this dont work. See <!doctype html> <html lang="pt-br"> <head> <meta charset="utf-8" /> <meta name="robots" content="noindex, nofollow" /> <meta name="generator" content="Notepad++" /> <meta name="author" content="Erick Ribeiro" /> <meta http-equiv="refresh" content="60" /> <title>Mozilla Firefox</title> <style type="text/css"> *{ font-family: calibri; } #menu { float: left; } .submenu { margin-top: 26px; padding: 10px; border: solid 1px rgb(224, 224, 224); background: rgb(254, 254, 254); color: rgb(0, 128, 224); border-radius: 0 0 4px 4px; } #menuHome:hover ~ #submenuControle { display: block; opacity: 0; color: red; } #submenuHome { display: none; opacity: 0; } #submenuControle { display: block; opacity: 1; } #submenuGestão { display: none; opacity: 0; } #submenuRL { display: none; opacity: 0; } #submenuSI { display: none; opacity: 0; } ul { float: left; list-style-type: none; padding: 0; margin: 0; } li { display: inline; float:left; } .primeiroItem { border: solid rgb(224, 224, 224); border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-radius: 4px 0 0 4px; } .naoPrimeiroItem { border: solid rgb(224, 224, 224); border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 0; } .ultimoItem { border: solid rgb(224, 224, 224); border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 0; border-radius: 0 4px 4px 0; } a { text-decoration:none; padding: 8px; border: solid 1px; color: rgb(0, 0, 0); background: rgb(240,240, 240); } a:visited { color: rgb(0, 0, 0); } </style> <script type="text/javascript"> </script> </head> <body> <nav id="menu"> <ul> <li><a id="menuHome" class="primeiroItem" href="#">Home</a></li> <li><a id="menuControle" class="naoPrimeiroItem" href="#">Controle</a></li> <li><a id="menuGestao" class="naoPrimeiroItem" href="#">Gestão</a></li> <li><a id="menuRL" class="naoPrimeiroItem" href="#">Relatórios e Listas</a></li> <li><a id="menuSI" class="ultimoItem" href="#">Sistema Informação</a></li> </ul> <div id="submenuHome" class="submenu"> </div> <div id="submenuControle" class="submenu"> BSC Comunicação Treinamento Documentos Controle de Acesso </div> <div id="submenuGestão" class="submenu"> ASV Treinamento Suprimentos Chamados</div> <div id="submenuRL" class="submenu"> Listas Relatórios </div> <div id="submenuSI" class="submenu"> </div> </nav> </body> </html>

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Cannot SSH after resetting firewall on VPS

- by Thomas Buckley

I'm having trouble trying to SSH to my Debian 5 VPS with blacknight. It was working fine until I did the following: Logged into 'Parallels Infrastructure Manager' - Container - Firewall - Set to 'Normal Firewall settings'. It told me there was an error with the IPTables and offered the option again with a checkbox to 'reset' firewall settings, I selected this. I can see that that the default rules are been applied ( anything from anyone on any port and allowing anything to happen). Whenever I attempt to SSH I get the following debug info: thomas@localmachine:~/.ssh$ ssh -v thomas@hostname OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to hostname [***********] port 22. debug1: Connection established. debug1: identity file /home/thomas/.ssh/id_rsa type 1 debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-4096 debug1: Checking blacklist file /etc/ssh/blacklist.RSA-4096 debug1: identity file /home/thomas/.ssh/id_rsa-cert type -1 debug1: identity file /home/thomas/.ssh/id_dsa type -1 debug1: identity file /home/thomas/.ssh/id_dsa-cert type -1 debug1: identity file /home/thomas/.ssh/id_ecdsa type -1 debug1: identity file /home/thomas/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5 debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-7ubuntu1 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Server host key: RSA ************************************* debug1: Host 'hostname' is known and matches the RSA host key. debug1: Found key in /home/thomas/.ssh/known_hosts:2 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/thomas/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: Trying private key: /home/thomas/.ssh/id_dsa debug1: Trying private key: /home/thomas/.ssh/id_ecdsa debug1: No more authentication methods to try. Permission denied (publickey). I had my public/private RSA keys set up and working fine before I reset the firewall settings. I had also made the following changes to my /etc/ssh/sshd_config file on the VPS: PermitRootLogin no PasswordAuthentication no X11Forwarding no UsePAM no UseDNS no AllowUsers thomas Could it be something to do with the SSH server & client having different versions between my local machine and VPS? Any help appreciated. Output with ssh -vvv thomas@localcomputer:~/.ssh$ ssh -vvv thomas@**************** OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to ************ [*************] port 22. debug1: Connection established. debug3: Incorrect RSA1 identifier debug3: Could not load "/home/thomas/.ssh/id_rsa" as a RSA1 public key debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug2: key_type_from_name: unknown key type 'Proc-Type:' debug3: key_read: missing keytype debug2: key_type_from_name: unknown key type 'DEK-Info:' debug3: key_read: missing keytype debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /home/thomas/.ssh/id_rsa type 1 debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-4096 debug1: Checking blacklist file /etc/ssh/blacklist.RSA-4096 debug1: identity file /home/thomas/.ssh/id_rsa-cert type -1 debug1: identity file /home/thomas/.ssh/id_dsa type -1 debug1: identity file /home/thomas/.ssh/id_dsa-cert type -1 debug1: identity file /home/thomas/.ssh/id_ecdsa type -1 debug1: identity file /home/thomas/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5 debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-7ubuntu1 debug2: fd 3 setting O_NONBLOCK debug3: load_hostkeys: loading entries for host "*****************" from file "/home/thomas/.ssh/known_hosts" debug3: load_hostkeys: found key type RSA in file /home/thomas/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],ssh-rsa debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: [email protected],[email protected],ssh-rsa,[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,[email protected],zlib debug2: kex_parse_kexinit: none,[email protected],zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,[email protected],aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,[email protected],aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,[email protected] debug2: kex_parse_kexinit: none,[email protected] debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: found hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug2: dh_gen_key: priv key bits set: 127/256 debug2: bits set: 498/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Server host key: RSA *********************************************************** debug3: load_hostkeys: loading entries for host "*********************" from file "/home/thomas/.ssh/known_hosts" debug3: load_hostkeys: found key type RSA in file /home/thomas/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug1: Host '****************' is known and matches the RSA host key. debug1: Found key in /home/thomas/.ssh/known_hosts:1 debug2: bits set: 516/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/thomas/.ssh/id_rsa (0x7fa7028b6010) debug2: key: /home/thomas/.ssh/id_dsa ((nil)) debug2: key: /home/thomas/.ssh/id_ecdsa ((nil)) debug1: Authentications that can continue: publickey debug3: start over, passed a different list publickey debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/thomas/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Authentications that can continue: publickey debug1: Trying private key: /home/thomas/.ssh/id_dsa debug3: no such identity: /home/thomas/.ssh/id_dsa debug1: Trying private key: /home/thomas/.ssh/id_ecdsa debug3: no such identity: /home/thomas/.ssh/id_ecdsa debug2: we did not send a packet, disable method debug1: No more authentication methods to try. Permission denied (publickey). sshd_config # Package generated configuration file # See the sshd(8) manpage for details # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin no StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) C hallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords PasswordAuthentication no # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding no X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server UsePAM no UseDNS no AllowUsers thomas Thanks

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Hadoop hdfs namenode is throwing an error

- by KarmicDice

Full list of error: hb@localhost:/etc/hadoop/conf$ sudo service hadoop-hdfs-namenode start * Starting Hadoop namenode: starting namenode, logging to /var/log/hadoop-hdfs/hadoop-hdfs-namenode-localhost.out 12/09/10 14:41:09 INFO namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = localhost/127.0.0.1 STARTUP_MSG: args = [] STARTUP_MSG: version = 2.0.0-cdh4.0.1 STARTUP_MSG: classpath = /etc/hadoop/conf:/usr/lib/hadoop/lib/xmlenc-0.52.jar:/usr/lib/hadoop/lib/protobuf-java-2.4.0a.jar:/usr/lib/hadoop/lib/kfs-0.3.jar:/usr/lib/hadoop/lib/asm-3.2.jar:/usr/lib/hadoop/lib/commons-logging-api-1.1.jar:/usr/lib/hadoop/lib/jasper-compiler-5.5.23.jar:/usr/lib/hadoop/lib/stax-api-1.0.1.jar:/usr/lib/hadoop/lib/commons-configuration-1.6.jar:/usr/lib/hadoop/lib/jets3t-0.6.1.jar:/usr/lib/hadoop/lib/jersey-server-1.8.jar:/usr/lib/hadoop/lib/oro-2.0.8.jar:/usr/lib/hadoop/lib/aspectjrt-1.6.5.jar:/usr/lib/hadoop/lib/json-simple-1.1.jar:/usr/lib/hadoop/lib/snappy-java-1.0.3.2.jar:/usr/lib/hadoop/lib/commons-httpclient-3.1.jar:/usr/lib/hadoop/lib/log4j-1.2.15.jar:/usr/lib/hadoop/lib/servlet-api-2.5.jar:/usr/lib/hadoop/lib/jackson-xc-1.8.8.jar:/usr/lib/hadoop/lib/jersey-json-1.8.jar:/usr/lib/hadoop/lib/jackson-mapper-asl-1.8.8.jar:/usr/lib/hadoop/lib/commons-el-1.0.jar:/usr/lib/hadoop/lib/slf4j-api-1.6.1.jar:/usr/lib/hadoop/lib/commons-collections-3.2.1.jar:/usr/lib/hadoop/lib/commons-logging-1.1.1.jar:/usr/lib/hadoop/lib/jackson-core-asl-1.8.8.jar:/usr/lib/hadoop/lib/jersey-core-1.8.jar:/usr/lib/hadoop/lib/commons-codec-1.4.jar:/usr/lib/hadoop/lib/jsr305-1.3.9.jar:/usr/lib/hadoop/lib/commons-cli-1.2.jar:/usr/lib/hadoop/lib/activation-1.1.jar:/usr/lib/hadoop/lib/jaxb-impl-2.2.3-1.jar:/usr/lib/hadoop/lib/jetty-util-6.1.26.cloudera.1.jar:/usr/lib/hadoop/lib/jasper-runtime-5.5.23.jar:/usr/lib/hadoop/lib/commons-beanutils-1.7.0.jar:/usr/lib/hadoop/lib/commons-lang-2.5.jar:/usr/lib/hadoop/lib/commons-digester-1.8.jar:/usr/lib/hadoop/lib/commons-io-2.1.jar:/usr/lib/hadoop/lib/jsp-api-2.1.jar:/usr/lib/hadoop/lib/guava-11.0.2.jar:/usr/lib/hadoop/lib/jetty-6.1.26.cloudera.1.jar:/usr/lib/hadoop/lib/jsch-0.1.42.jar:/usr/lib/hadoop/lib/zookeeper-3.4.3-cdh4.0.1.jar:/usr/lib/hadoop/lib/avro-1.5.4.jar:/usr/lib/hadoop/lib/core-3.1.1.jar:/usr/lib/hadoop/lib/paranamer-2.3.jar:/usr/lib/hadoop/lib/jettison-1.1.jar:/usr/lib/hadoop/lib/jackson-jaxrs-1.8.8.jar:/usr/lib/hadoop/lib/slf4j-log4j12-1.6.1.jar:/usr/lib/hadoop/lib/commons-beanutils-core-1.8.0.jar:/usr/lib/hadoop/lib/commons-net-3.1.jar:/usr/lib/hadoop/lib/jaxb-api-2.2.2.jar:/usr/lib/hadoop/lib/commons-math-2.1.jar:/usr/lib/hadoop/lib/jline-0.9.94.jar:/usr/lib/hadoop/.//hadoop-annotations.jar:/usr/lib/hadoop/.//hadoop-annotations-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop/.//hadoop-common-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop/.//hadoop-auth-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop/.//hadoop-common.jar:/usr/lib/hadoop/.//hadoop-auth.jar:/usr/lib/hadoop/.//hadoop-common-2.0.0-cdh4.0.1-tests.jar:/usr/lib/hadoop-hdfs/./:/usr/lib/hadoop-hdfs/lib/protobuf-java-2.4.0a.jar:/usr/lib/hadoop-hdfs/lib/snappy-java-1.0.3.2.jar:/usr/lib/hadoop-hdfs/lib/log4j-1.2.15.jar:/usr/lib/hadoop-hdfs/lib/jackson-mapper-asl-1.8.8.jar:/usr/lib/hadoop-hdfs/lib/slf4j-api-1.6.1.jar:/usr/lib/hadoop-hdfs/lib/commons-logging-1.1.1.jar:/usr/lib/hadoop-hdfs/lib/jackson-core-asl-1.8.8.jar:/usr/lib/hadoop-hdfs/lib/commons-daemon-1.0.3.jar:/usr/lib/hadoop-hdfs/lib/zookeeper-3.4.3-cdh4.0.1.jar:/usr/lib/hadoop-hdfs/lib/avro-1.5.4.jar:/usr/lib/hadoop-hdfs/lib/paranamer-2.3.jar:/usr/lib/hadoop-hdfs/lib/jline-0.9.94.jar:/usr/lib/hadoop-hdfs/.//hadoop-hdfs-2.0.0-cdh4.0.1-tests.jar:/usr/lib/hadoop-hdfs/.//hadoop-hdfs-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-hdfs/.//hadoop-hdfs.jar:/usr/lib/hadoop-yarn/lib/protobuf-java-2.4.0a.jar:/usr/lib/hadoop-yarn/lib/asm-3.2.jar:/usr/lib/hadoop-yarn/lib/netty-3.2.3.Final.jar:/usr/lib/hadoop-yarn/lib/javax.inject-1.jar:/usr/lib/hadoop-yarn/lib/jersey-server-1.8.jar:/usr/lib/hadoop-yarn/lib/jersey-guice-1.8.jar:/usr/lib/hadoop-yarn/lib/snappy-java-1.0.3.2.jar:/usr/lib/hadoop-yarn/lib/log4j-1.2.15.jar:/usr/lib/hadoop-yarn/lib/guice-3.0.jar:/usr/lib/hadoop-yarn/lib/jackson-mapper-asl-1.8.8.jar:/usr/lib/hadoop-yarn/lib/junit-4.8.2.jar:/usr/lib/hadoop-yarn/lib/jackson-core-asl-1.8.8.jar:/usr/lib/hadoop-yarn/lib/jersey-core-1.8.jar:/usr/lib/hadoop-yarn/lib/jdiff-1.0.9.jar:/usr/lib/hadoop-yarn/lib/guice-servlet-3.0.jar:/usr/lib/hadoop-yarn/lib/aopalliance-1.0.jar:/usr/lib/hadoop-yarn/lib/commons-io-2.1.jar:/usr/lib/hadoop-yarn/lib/avro-1.5.4.jar:/usr/lib/hadoop-yarn/lib/paranamer-2.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-web-proxy.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-nodemanager.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-resourcemanager-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-common.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-common.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-applications-distributedshell-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-web-proxy-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-api.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-resourcemanager.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-common-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-nodemanager-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-site.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-api-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-common-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-applications-distributedshell.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-site-2.0.0-cdh4.0.1.jar:/usr/lib/hadoop-mapreduce/.//* STARTUP_MSG: build = file:///var/lib/jenkins/workspace/generic-package-ubuntu64-12-04/CDH4.0.1-Packaging-Hadoop-2012-06-28_17-01-57/hadoop-2.0.0+91-1.cdh4.0.1.p0.1~precise/src/hadoop-common-project/hadoop-common -r 4d98eb718ec0cce78a00f292928c5ab6e1b84695; compiled by 'jenkins' on Thu Jun 28 17:39:19 PDT 2012 ************************************************************/ 12/09/10 14:41:10 WARN impl.MetricsConfig: Cannot locate configuration: tried hadoop-metrics2-namenode.properties,hadoop-metrics2.properties hdfs-site.xml: hb@localhost:/etc/hadoop/conf$ cat hdfs-site.xml <?xml version="1.0" encoding="UTF-8"?>  <configuration> <property> <name>dfs.https.address</name> <value>localhost:50470</value> </property> <property> <name>dfs.https.port</name> <value>50470</value> </property> <property> <name>dfs.namenode.http-address</name> <value>localhost:50070</value> </property> <property> <name>dfs.replication</name> <value>1</value> </property> <property> <name>dfs.blocksize</name> <value>134217728</value> </property> <property> <name>dfs.client.use.datanode.hostname</name> <value>false</value> </property> </configuration>

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Printing fails after first print with Centos 6 and HP LaserJet P3015dn printer

- by Gavin Simpson

Centos 6 recognises and configures a HP LaserJet P3015dn printer connected via USB. This machine is being configured as a small group file/print server. I can print a test page, which is processed/printed correctly. The next time printing is attempted (say printing a second test page), the page is not printed and the printer is set to disabled. The status of the printer is stated as: Stopped - /usr/lib/cups/backend/hp failed in the printer configuration dialogue. /var/log/cups/error_log contains this information (first two lines were there prior to the failed print job) E [24/Jun/2004:09:12:57 +0100] Returning HTTP Forbidden for Resume-Printer (ipp://localhost/printers/HP-LaserJet-P3010-Series) from localhost E [24/Jun/2004:09:20:59 +0100] Returning HTTP Forbidden for CUPS-Delete-Printer (ipp://localhost/printers/HP-LaserJet-P3010-Series) from localhost D [24/Jun/2004:09:37:28 +0100] [Job 28] The following messages were recorded from 09:36:43 AM to 09:37:28 AM D [24/Jun/2004:09:37:28 +0100] [Job 28] Adding start banner page "none". D [24/Jun/2004:09:37:28 +0100] [Job 28] Adding end banner page "none". D [24/Jun/2004:09:37:28 +0100] [Job 28] File of type application/vnd.cups-banner queued by "gavin". D [24/Jun/2004:09:37:28 +0100] [Job 28] hold_until=0 D [24/Jun/2004:09:37:28 +0100] [Job 28] Queued on "HP-LaserJet-P3010-Series" by "gavin". D [24/Jun/2004:09:37:28 +0100] [Job 28] job-sheets=none,none D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[0]="HP-LaserJet-P3010-Series" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[1]="28" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[2]="gavin" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[3]="Test Page" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[4]="1" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[5]="job-uuid=urn:uuid:b3370a97-4ab6-3451-40a2-6239b13fa3e1 job-originating-host-name=localhost" D [24/Jun/2004:09:37:28 +0100] [Job 28] argv[6]="/var/spool/cups/d00028-001" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[0]="CUPS_CACHEDIR=/var/cache/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[1]="CUPS_DATADIR=/usr/share/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[2]="CUPS_DOCROOT=/usr/share/cups/www" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[3]="CUPS_FONTPATH=/usr/share/cups/fonts" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[4]="CUPS_REQUESTROOT=/var/spool/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[5]="CUPS_SERVERBIN=/usr/lib/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[6]="CUPS_SERVERROOT=/etc/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[7]="CUPS_STATEDIR=/var/run/cups" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[8]="HOME=/var/spool/cups/tmp" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[9]="PATH=/usr/lib/cups/filter:/usr/bin:/usr/sbin:/bin:/usr/bin" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[10]="[email protected]" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[11]="SOFTWARE=CUPS/1.4.2" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[12]="TMPDIR=/var/spool/cups/tmp" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[13]="USER=root" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[14]="CUPS_SERVER=/var/run/cups/cups.sock" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[15]="CUPS_ENCRYPTION=IfRequested" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[16]="IPP_PORT=631" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[17]="CHARSET=utf-8" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[18]="LANG=en_US.UTF-8" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[19]="PPD=/etc/cups/ppd/HP-LaserJet-P3010-Series.ppd" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[20]="RIP_MAX_CACHE=8m" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[21]="CONTENT_TYPE=application/vnd.cups-banner" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[22]="DEVICE_URI=hp:/usb/HP_LaserJet_P3010_Series?serial=VNBV993GM4" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[23]="PRINTER_INFO=Hewlett-Packard HP LaserJet P3010 Series" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[24]="PRINTER_LOCATION=electra.geog.ucl.ac.uk" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[25]="PRINTER=HP-LaserJet-P3010-Series" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[26]="CUPS_FILETYPE=document" D [24/Jun/2004:09:37:28 +0100] [Job 28] envp[27]="FINAL_CONTENT_TYPE=application/vnd.cups-postscript" D [24/Jun/2004:09:37:28 +0100] [Job 28] Started filter /usr/lib/cups/filter/bannertops (PID 2858) D [24/Jun/2004:09:37:28 +0100] [Job 28] Started filter /usr/lib/cups/filter/pstops (PID 2859) D [24/Jun/2004:09:37:28 +0100] [Job 28] Started backend /usr/lib/cups/backend/hp (PID 2860) D [24/Jun/2004:09:37:28 +0100] [Job 28] load_banner(filename="/var/spool/cups/d00028-001") D [24/Jun/2004:09:37:28 +0100] [Job 28] Page = 612x792; 12,12 to 600,780 D [24/Jun/2004:09:37:28 +0100] [Job 28] Page = 612x792; 12,12 to 600,780 D [24/Jun/2004:09:37:28 +0100] [Job 28] slow_collate=0, slow_duplex=0, slow_order=0 D [24/Jun/2004:09:37:28 +0100] [Job 28] Before copy_comments - %!PS-Adobe-3.0 D [24/Jun/2004:09:37:28 +0100] [Job 28] %!PS-Adobe-3.0 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%BoundingBox: 12 12 600 780 D [24/Jun/2004:09:37:28 +0100] [Job 28] %cupsRotation: 0 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%Creator: bannertops/CUPS v1.4.2 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%CreationDate: Thu 24 Jun 2004 09:36:43 AM BST D [24/Jun/2004:09:37:28 +0100] [Job 28] %%LanguageLevel: 2 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%DocumentData: Clean7Bit D [24/Jun/2004:09:37:28 +0100] [Job 28] %%Title: (Test Page) D [24/Jun/2004:09:37:28 +0100] [Job 28] %%For: (gavin) D [24/Jun/2004:09:37:28 +0100] [Job 28] %%Pages: 1 D [24/Jun/2004:09:37:28 +0100] [Job 28] %%DocumentSuppliedResources: font Monospace D [24/Jun/2004:09:37:28 +0100] [Job 28] %%+ font Monospace-Bold D [24/Jun/2004:09:37:28 +0100] [Job 28] %%+ font Monospace-BoldOblique D [24/Jun/2004:09:37:28 +0100] [Job 28] %%+ font Monospace-Oblique D [24/Jun/2004:09:37:28 +0100] [Job 28] %%EndComments D [24/Jun/2004:09:37:28 +0100] [Job 28] Before copy_prolog - %%BeginProlog D [24/Jun/2004:09:37:28 +0100] [Job 28] STATE: +connecting-to-device D [24/Jun/2004:09:37:28 +0100] [Job 28] prnt/backend/hp.c 762: ERROR: cannot open channel PRINT D [24/Jun/2004:09:37:28 +0100] [Job 28] Backend returned status 1 (failed) D [24/Jun/2004:09:37:28 +0100] [Job 28] Printer stopped due to backend errors; please consult the error_log file for details. D [24/Jun/2004:09:37:28 +0100] [Job 28] End of messages D [24/Jun/2004:09:37:28 +0100] [Job 28] printer-state=5(stopped) D [24/Jun/2004:09:37:28 +0100] [Job 28] printer-state-message="/usr/lib/cups/backend/hp failed" D [24/Jun/2004:09:37:28 +0100] [Job 28] printer-state-reasons=paused /var/log/messages contains the following reports associated with the recognition of the printer and the failed print job: Jun 24 09:35:07 electra kernel: usb 1-8: new high speed USB device using ehci_hcd and address 2 Jun 24 09:35:07 electra kernel: usb 1-8: New USB device found, idVendor=03f0, idProduct=8d17 Jun 24 09:35:07 electra kernel: usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jun 24 09:35:07 electra kernel: usb 1-8: Product: HP LaserJet P3010 Series Jun 24 09:35:07 electra kernel: usb 1-8: Manufacturer: Hewlett-Packard Jun 24 09:35:07 electra kernel: usb 1-8: SerialNumber: VNBV993GM4 Jun 24 09:35:07 electra kernel: usb 1-8: configuration #1 chosen from 1 choice Jun 24 09:35:07 electra kernel: usblp0: USB Bidirectional printer dev 2 if 0 alt 1 proto 2 vid 0x03F0 pid 0x8D17 Jun 24 09:35:07 electra kernel: usbcore: registered new interface driver usblp Jun 24 09:35:07 electra udev-configure-printer: invalid or missing IEEE 1284 Device ID Jun 24 09:35:08 electra hp[1942]: io/hpmud/pp.c 627: unable to read device-id ret=-1 Jun 24 09:35:09 electra python: io/hpmud/pp.c 627: unable to read device-id ret=-1 Jun 24 09:35:51 electra kernel: usblp0: removed Jun 24 09:37:28 electra hp[2860]: io/hpmud/dot4.c 254: unable to read Dot4ReverseReply data: Resource temporarily unavailable exp=2 act=0 Jun 24 09:37:28 electra hp[2860]: io/hpmud/dot4.c 330: invalid DOT4InitReply: cmd=0, result=20#012, revision=0 Jun 24 09:37:28 electra hp[2860]: prnt/backend/hp.c 762: ERROR: cannot open channel PRINT I am now at a loss as to how to proceed to get this printer working on my Centos machine. How can I configure the machine to print more than a single print job without needing to be unplugged/plugged in repeatedly?

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