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  • Unable to make 2 parallel TCP requests to the same TCP Client

    - by soldieraman
    Error: Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall Situation There is a TCP Server My web application connects to this TCP Server Using the below code: TcpClientInfo = new TcpClient(); _result = TcpClientInfo.BeginConnect(<serverAddress>,<portNumber>, null, null); bool success = _result.AsyncWaitHandle.WaitOne(20000, true); if (!success) { TcpClientInfo.Close(); throw new Exception("Connection Timeout: Failed to establish connection."); } NetworkStreamInfo = TcpClientInfo.GetStream(); NetworkStreamInfo.ReadTimeout = 20000; 2 Users use the same application from two different location to access information from this server at the SAME TIME Server takes around 2sec to reply Both Connect But One of the user gets above error "Unable to read data from the transport connection: A blocking operation was interrupted by a call to WSACancelBlockingCall" when trying to read data from stream How can I resolve this issue? Use a better way of connecting to the server Can't because it's a server issue if a server issue, how should the server handle request to avoid this problem

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  • How to run multiple Linux installations on a single VirtualBox?

    - by NoCatharsis
    I just started playing with VirtualBox to check out different versions of Linux. I was wondering if it would be possible (and recommended) to set up a single virtual machine with multiple partitions - one for each separate version of Linux, one for swap memory, and one fully shared /home partition? Still new to Linux, but I've read this is a good way to partition so you can share common applications between Linux installations, however I think everything I've read is pertaining to literal partitions and not virtual machines.

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  • What's wrong with this SQL UPDATE query?

    - by Tommo
    I wouldn't ask if i wasn't sure that i have 100% no idea why this isn't working, so, in PHP i'm simply trying to update a value in the MySQL database: The field im updating - Name: read - Type: tinyint - Length: 1 Here is the PHP code: do_SQL("UPDATE messages SET read=1 WHERE id='".$id."'"); The do_SQL function is working for everything else, so it's something wrong with this statement. I have tried putting 1 in '1' and it still didn't work.m The error is: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read=1 WHERE id='1'' at line 1 Thanks for reading!

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  • Resizing uploaded files in django using PIL

    - by Nikunj
    I am using PIL to resize an uploaded file using this method: def resize_uploaded_image(buf): imagefile = StringIO.StringIO(buf.read()) imageImage = Image.open(imagefile) (width, height) = imageImage.size (width, height) = scale_dimensions(width, height, longest_side=240) resizedImage = imageImage.resize((width, height)) return resizedImage I then use this method to get the resizedImage in my main view method: image = request.FILES['avatar'] resizedImage = resize_uploaded_image(image) content = django.core.files.File(resizedImage) acc = Account.objects.get(account=request.user) acc.avatar.save(image.name, content) However, this gives me the 'read' error. Trace: Exception Type: AttributeError at /myapp/editAvatar Exception Value: read Any idea how to fix this? I have been at it for hours! Thanks! Nikunj

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  • Solaris 11 /proc permission denied

    - by Damo
    I have a Solaris 11.1 server running an Oracle database. I want to read the environment of a running oracle process, as the oracle user, like this: $ id uid=100(oracle) gid=100(oinstall) $ ps -fuoracle | grep pmon oracle 1651 1 0 10:25:37 ? 0:01 ora_pmon_TESTDB $ pargs -e 1651 pargs: cannot examine 1651: permission denied $ ls -ld /proc/1651 dr-x--x--x 5 oracle oinstall 864 Nov 23 10:25 /proc/1651 How can I grant permissions for oracle to read processes that it already owns?

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  • Subprocess fails to catch the standard output

    - by user343934
    I am trying to generate tree with fasta file input and Alignment with MuscleCommandline import sys,os, subprocess from Bio import AlignIO from Bio.Align.Applications import MuscleCommandline cline = MuscleCommandline(input="c:\Python26\opuntia.fasta") child= subprocess.Popen(str(cline), stdout = subprocess.PIPE, stderr=subprocess.PIPE, shell=(sys.platform!="win32")) align=AlignIO.read(child.stdout,"fasta") outfile=open('c:\Python26\opuntia.phy','w') AlignIO.write([align],outfile,'phylip') outfile.close() I always encounter with these problems Traceback (most recent call last): File "<string>", line 244, in run_nodebug File "C:\Python26\muscleIO.py", line 11, in <module> align=AlignIO.read(child.stdout,"fasta") File "C:\Python26\Lib\site-packages\Bio\AlignIO\__init__.py", line 423, in read raise ValueError("No records found in handle") ValueError: No records found in handle

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  • Problem of reading OWL/XML

    - by Mikae Combarado
    Hello, I have a problem reading OWL/XML files from Java using Jena. I have no problem reading RDF/XML files, but whenever I create a OWL/XML file from Protege and try to read it, Java gives this error below : WARN [main] (RDFDefaultErrorHandler.java:36) Exception in thread "main" java.lang.NullPointerException at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.endElement(XMLHandler.java:143) The code that I use to retrieve RDF/XML is below : OntModel ontModel = ModelFactory.createOntologyModel(); InputStream in = FileManager.get().open(inputFileName); if (in == null) { throw new IllegalArgumentException( "File: " + inputFileName + " not found"); } ontModel.read(in, ""); This code works with RDF/XML perfectly. However, I cannot read an OWL/XML. I looked at Internet and I couldn't find anything. I would really appreciate, if someone shows me a way. Many thanks

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  • Reading Usenet w/o Spam

    - by user36720
    I'm trying to read comp.lang.javascript. The group seems to be active with decent content, but there is so much spam in there. Currently I'm reading it via Google Groups (http://groups.google.com/group/comp.lang.javascript/topics). Is there a way to read this group without the spam?

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  • Software Requirement Specifications for Web Applications

    - by illuminatedtiger
    Hi guys, I'm looking for some guidance/books to read when it comes to creating a software requirement specification for a web application. For inspiration I have read some spec documents for desktop based applications. The documents I have read capture a systems functional requirements in use cases which tend to be rather data oriented with use cases centered around the various CRUD operations the application is intended to perform. I like this structure however I'm finding it rather difficult to marry it to what my web application needs to do, mostly reading data as opposed to manipulating it. I've had a go at writing some use cases however they all tend to boil down to "Search for item", "Change view of search results" or "User selects facet to refine search results". This doesn't sound quite right to me and makes me wonder if I'm going about this the right way. Are there planning differences between web based and desktop based applications?

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  • Web.config file permissions

    - by ristonj
    I would like to lock down the web.config file as much as possible, so that as few accounts as necessary can read the file. I saw the list here http://msdn.microsoft.com/en-us/library/ms178699.aspx but allowing the Users group read permission on the web.config file seems excessive. Thanks.

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  • How to display multiple unicode text files in non-unicode program

    - by Stan
    OS:WinXP Say I got some files in Chinese and some files in Korean. And in windows 'Region and Language Options', I set language for non-unicode program = Chinese. Is there any way that I can read some Korean text file in text editor easily without using Microsoft Word? I need an environment that can support multiple unicode easily, I need to read Chinese, Japanese, Korean in text editor (Ultraeditor, notepad++) and terminal clients like SecureCRT. Please advise, thanks.

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  • Tool to highlight and annotate text on websites?

    - by doug
    When I read something I need to underscore what I like, or what I think is important, and to take notices about that read, near on that current paragraph. So, does anyone know a Firefox add-on or something else (another browser, any other application) which can provide me such a functionality? ps: I've tried some research tools as Zotero, but it is not what I'm looking for.

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  • Resources on wordpress theme-development

    - by Espenhh
    What are the best resources for Wordpress theme-development? I am currently in the phase of starting my own blog, and don't want to use one of the many free themes. I already have a theme for my website, so I want to read about best-practices. Any advice on how to get started would be very welcome :) I have now created my theme (wohoo!), and thought I should summarize the best resources I found. Lets see.. Resources: ThemeTation's three-part guide to create a wordpress-theme from scratch Nettuts.com's guide: How to Create a Wordpress Theme from Scratch (And Part 2) Didn't actually use this, it's a quite new article, but anyway - it's great. It will get a follow-up in the next few days too.. Wordpress.org's own guide on templates Definatly a must-read for everyone new to wordpress-designing.. "The loop" Essential knowledge, also a must-read Directory of all the template tags Used by wordpress to actually output blog-content.. Inspiration: Smashing Magazine's lists: first, one more, yet another one Wordpress.org's theme-directory

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  • Socket : can an asynchronous Receive returns without reading all the bytes I asked for?

    - by NorthWind
    Hi; I was reading an article on Vadym Stetsiak's blog about how to transfer variable length messages with async sockets (url: http://vadmyst.blogspot.com/2008/03/part-2-how-to-transfer-fixed-sized-data.html). He says : What to expect when multiple messages arrive at the server? While dealing with multiple messages one has to remember that receive operation can return arbitrary number of bytes being read from the net. Typically that size is from 0 to specified buffer length in the Receive or BeginReceive methods. So, even if I tell BeginReceive to read 100 bytes, it may read less than that and returns??? I am developing a network-enabled software (TCP/IP), and I always receive the same exact number of bytes I asked for. I don't even understand the logic : why would Receive completes asynchronously if it didn't get every byte I asked for ... just keep waiting. Maybe it has something to do with IP vs TCP? Thank you for your help.

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  • Why does unpartitioned Hitachi HDS5C3020 drive start consuming 50% more power 15 minutes after boot?

    - by Pro Backup
    In a Debian 6.0.6 system there are 74 pieces of 2TB Toshiba DT01ABA200 drives. These drives are identified as Hitachi HDS5C3020BLE630 drives running firmware revision MZ4OAAB0. 64 Drives attached via HP SAS expander cards to an LSI 2008 SAS controller, another 5 drives are connected directly to the mainboard, 4 drives are connected to a Sil based PCI controller and last 1 drive is only powered and has no data cable connected. The controller LSI and Sil card's their onboard BIOS are both disabled and the mpt2sas and sata_sil modules are removed from the Linux debian 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux kernel. The mpt2sas module is loaded after boot using a modprobe command in /etc/rc.local. These 74 drives are not partitioned, neither formatted and also not mounted. The system consumes: with 0 drives: 70.6 - 70.9 Watt (also 15 minutes after boot); with 74 drives: 330 - 360 Watt, just after boot (is equivalent to 3.5 - 3.9W per drive in idle state); with 74 drives: 420 - 466 Watt, each time in the 15th minute of uptime (is equivalent to 4.7 - 5.3W per drive in idle state). The drive specification lists 4.7W as read/write, and 3.3W as idle power consumption. The increased power consumption is most likely on the 5V line, because after roughly 1 minute an "over current protection" (OCP) of the power supply (PSU) shuts down the power. The used PSU is a single rail model with an OCP of 122A on the 12V line and 55A on the 5V line. Regression: It doesn't matter whether the drive its APM value is set to disabled or 1 (maximum power saving). The operating system records no read/write activity in /proc/diskstats. The values there are identical (28 read, 0 write operations) as immediately after the modprobe operation. Can't test what happens when booting into the mainboard it's BIOS - to exclude any OS intervention - because the Super Micro X8SI6-F mainboard running firmware 06/27/12 has a bug that incorrectly reads a +74.0 C CPU sensor temperature as "High" in BIOS mode, and shuts down the power after 1 minute. What might be causing the drive read/write activity on all drives in the 15th minute after boot and how to prevent it from happening?

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  • c# xml string special characters

    - by sam
    Please help explain why the dataset cannot read the encoded xml? string xml = "<?xml version=\"1.0\" standalone=\"yes\" ?> <DataSet><node>it's my \"node\" & i like it</node></DataSet>"; string encodedXml = System.Security.SecurityElement.Escape(xml); DataSet ds = new DataSet(); ds.ReadXml(New XmlTextReader(new StringReader(encodedXml))); I have checked the link http://weblogs.sqlteam.com/mladenp/archive/2008/10/21/Different-ways-how-to-escape-an-XML-string-in-C.aspx What i want to do is to read a string with special characters into a dataset. But the code cannot locate the special characters in the string, c# added all the \ so the linenumber is not accurate generated by XmlException object. Anyone could provide the code to read a string with special characters into a dataset. thanks very much

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  • Reading files using Windows API

    - by Eli Polonsky
    Hi I'm trying to write a console program that reads characters from a file. i want it to be able to read from a Unicode file as well as an ANSI one. how should i address this issue? do i need to programatically distinguish the type of file and read acoordingly? or can i somehow use the windows API data types like TCHAR and stuff like that. The only differnce between reading from the files is that in Unicode i have to read 2 bytes for a character and in ASNSI its 1 byte? im a little lost with this windows API. would appretiate any help thanks

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  • JavaFX Threading issue - GUI freezing while method call ran.

    - by David Meadows
    Hi everyone, I hoped someone might be able to help as I'm a little stumped. I have a javafx class which runs a user interface, which includes a button to read some text out loud. When you press it, it invokes a Java object which uses the FreeTTS java speech synth to read out loud a String, which all works fine. The problem is, when the speech is being read out, the program stops completely until its completed. I'm not an expert on threaded applications, but I understand that usually if I extend the Thread class, and provided my implementation of the speech synth code inside an overridden run method, when I call start on the class it "should" create a new Thread, and run this code there, allowing the main thread which has the JavaFX GUI on to continue as normal. Any idea why this isn't the case? Thanks a lot in advance!

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  • Attaching HTML file as email in VB 6.0

    - by Shax
    Hi, I am trying to attach an html file file to email using Visual Basic 6.0. when the cursor is comes on Open strFile For Binary Access Read As #hFile line it gives error "Error encoding file - Bad file name or number". Please all your help and support would be highly appreciated. Dim handleFile As Integer Dim strValue As String Dim lEventCtr As Long handleFile = FreeFile Open strFile For Binary Access Read As #handleFile Do While Not EOF(hFile) ' read & Base 64 encode a line of characters strValue = Input(57, #handleFile) SendCommand EncodeBase64String(strValue) & vbCrLf ' DoEvents (occasionally) lEventCtr = lEventCtr + 1 If lEventCtr Mod 50 = 0 Then DoEvents Loop Close #handleFile Exit Sub File_Error: Close #handleFile m_ErrorDesc = "Error encoding file - " & Err.Description Err.Raise Err.Number, Err.Source, m_ErrorDesc End Sub

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  • Java: downloading issue using BufferedInputStream, BufferedOutputStream

    - by nkr1pt
    When downloading a rar file from the internet with the code below, the downloaded file is larger than it actually is. Not sure what causes this? bis = new BufferedInputStream(urlConn.getInputStream()); bos = new BufferedOutputStream(new FileOutputStream(outputFile)); eventBus.fireEvent(this, new DownloadStartedEvent(item)); int read; byte[] buffer = new byte[2048]; while ((read = bis.read(buffer)) != -1) { bos.write(buffer); } eventBus.fireEvent(this, new DownloadCompletedEvent(item));

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  • VB.net: Is my Thread Safe List Solution actually safe?

    - by Shiftbit
    I've added teh following Extensions to my Project in order to create a thread safe list: Extensions If I want to conduct a simple operation on my list <Extension()> _ Public Sub Action(Of T)(ByVal list As List(Of T), ByVal action As Action(Of List(Of T))) SyncLock (list) action(list) End SyncLock End Sub If I want to pass it more than one parameter I could simply extend it with more items... <Extension()> _ Public Sub Action(Of T)(ByVal list As List(Of T), ByVal action As Action(Of List(Of T), T), ByVal item As T) SyncLock (list) Action(list, item) End SyncLock End Sub Actions I have created the following Action Examples: Private Sub Read(Of T)(ByVal list As List(Of T)) Console.WriteLine("Read") For Each item As T In list Console.WriteLine(item.ToString) Thread.Sleep(10) Next End Sub and also one that takes a parameter: Private Sub Write(Of T)(ByVal list As List(Of T), ByVal item As T) Thread.Sleep(100) list.Add(item) Console.WriteLine("Write") End Sub Initiating Then in my various threads I will call my Actions with: list.Action(AddressOf Read) or list.Action(AddressOf Write2, 10) Are these Extenxion methods thread safe or do you have other recommendations?

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  • Python - Things I shouldn't be doing?

    - by cornjuliox
    I've got a few questions about best practices in Python. Not too long ago I would do something like this with my code: ... junk_block = "".join(open("foo.txt","rb").read().split()) ... I don't do this anymore because I can see that it makes code harder to read, but would the code run slower if I split the statements up like so: f_obj = open("foo.txt", "rb") f_data = f_obj.read() f_data_list = f_data.split() junk_block = "".join(f_data_list) I also noticed that there's nothing keeping you from doing an 'import' within a function block, is there any reason why I should do that?

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  • How to show unread subforums?

    - by bilygates
    I have written a simple forum in PHP using PostgreSQL. The forum consists of a number of subforums (or categories, if you like) that contain topics. I have a table that stores when was the last time a user visited a topic. It's something like this: user_id, topic_id, timestamp. I can easily determine what topics should be marked as unread by comparing the timestamp of the last topic reply with the timestamp of the last user visit. My question is: how do I efficiently determine what subforums (categories) should be marked as unread? All I've come up with is this: every time a user visits a topic, update the visit timestamp and check if all the topics from the current subforum are read or unread. If they are all read, mark the subforum as read for the user. Else, mark it as unread. But I think there must be another way. Thank you in advance.

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