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  • Debug unstable Apache server under Debian

    - by almo
    Since yesterday my Apache server that runs on a Debian machine runs very unstable. Sometiems my websites load and sometimes not. I think it has to do with the memory since my Apache log is full of Out of memory (allocated 262144) (tried to allocate 4480 bytes). I also attached a screenshot of the memory graph. A server restart resolves the problem temporarily. I looked at the processes that are using memory but the biggest one is MySQL with 6.5%. Where else can look for the problem? Edit: I did a free -m right after rebooting and one about 2 hours later. I think the trend is visible: root@xxx:~# free -m total used free shared buffers cached Mem: 4016 731 3284 0 80 200 -/+ buffers/cache: 449 3566 Swap: 459 0 459 root@xxx:~# free -m total used free shared buffers cached Mem: 4016 2466 1550 0 92 473 -/+ buffers/cache: 1900 2115 Swap: 459 0 459

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  • Change Apache DocumentDirectory path in trueCrypt partition

    - by Alan C
    Hello, I'm recently moving from windows to linux, so I've setup my machine to dual boot Windows7 and Ubuntu 10.04. I was able to successfully setup Apache on the Ubuntu partition, but I need to move the DocumentRoot since my websites are on a TrueCrypt partition that is in another hard drive so I can have them accessible in both OS. I followed some guides on how to change the path for the DocumentRoot so I end up modifiying the default file at /etc/apache2/sites-available DocumentRoot /media/truecrypt1/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /media/truecrypt1/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> Those are the lines that I've changed, but now when I go to localhost I always get the Forbidden You don't have permission to access / on this server. Apache/2.2.14 (Ubuntu) Server at localhost Port 80

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  • Apache and fastcgi - How to secure an Apache server with fastcgi enabled?

    - by skyeagle
    I am running a headless server on Ubuntu 10.x. I am running Apache 2.2. I am writing a fastcgi application for deployment on the server. I remember reading a while back (I could be wrong) that running CGI (and by implication fastcgi) on a server, can provide 'backdoors' for potential attackers - or at the very least, could compromise the server if certain security measurements are not taken. My questions are: what are the security 'gotcha's that I have to be aware of if I am enabling mod_fastcgi on my Apache server? I want to run the fastcgi as a specific user (with restricted access) how do I do this?

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  • Apache httpd.conf handle multiple domains to run the same application

    - by John Stewart
    So what we are looking for is the ability to do the following: We have an application that can load certain settings based on the domain that it is being accessed from. So if you come from xyz.com we show a different logo and if you come from abc.com we show a different logo. The code is the same, running from same server just detects the domain on the run Now we want to get a dedicated server (any suggestions?) that will enable us to point all the doamins that we want to this server (we change the DNS for the domains to that of our server) and then when the user goes to a certain domain they run the same application. Now as far as I can understand we will need to create a "VirtualHost" in apache to handle this. Can we create a wildcard virtualhost that catches all the domains? I am not an expert with Apache at all. So please forgive if this comes out to be a silly question. Any detailed help would be great. Thanks

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  • Apache Virtual host Subdomains points to same directory

    - by Jakobud
    I have setup subdomains using Apache before and have never really ran into any big problems. But with this (I believe Centos) server that is one of my clients, I'm not understanding what I'm doing wrong. Here is the .conf that apache is loading: Listen 80 NameVirtualHost *:80 <VirtualHost *:80> ServerName www.thedomain.com DocumentRoot /u1/thedomain.com/public RailsEnv production </VirtualHost> <VirtualHost *:80> ServerName subdomain.thedomain.com DocumentRoot /u1/subdomain.thedomain.com/public_html </VirtualHost> When I access either the primary or subdomain addresses, they both point to the primary www.thedomain.com content. Any thoughts? UPDATE: Yes I did a configtest and graceful after making the changes.

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  • IIS and Apache on the same machine?

    - by MLS
    I have a Windows 2003 Server running IIS (due to an ASP Site needing to be hosted). I wanted to add some non ASP sites (HTML, PHP and MySQL) so I was thinking I could just run apache on 8080. What confuses me a bit is if someone hits DomiainA.com, IIS intercepts it and forwards it to DomainA.com:8080 where apache is running. I could do this by putting a server side javascript re-direct in the IIS www-root for the domain. What else can I do that might be more proper?

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  • SuexecUserGroup not working in Apache 2.4

    - by James W.
    I have upgraded my PHP from version 5.3 to 5.4 via yum which requires upgrading Apache from version 2.2 to 2.4. After doing configuration, it turns out that the userid and groupid is still using the global user/group which is "apache". <VirtualHost *:80> ServerName example.com ServerAdmin [email protected] DocumentRoot "/path/to/webroot" .... .... <IfModule mod_fcgid.c> SuexecUserGroup user-name group-name <Directory "/path/to/webroot"> Options +ExecCGI AllowOverride All AddHandler fcgid-script .php FcgidWrapper /path/to/webroot/php-fcgi-scripts/php-fcgi-starter .php Order allow,deny Allow from all </Directory> </IfModule> ........ </VirtualHost> /etc/httpd/modules/base.conf: LoadModule suexec_module modules/mod_suexec.so I would appreciate if anyone could advise what was I missed. Thanks.

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  • Site's performance slows over time until Apache is restarted

    - by udbhav
    I'm running a Django app w/ Nginx and Apache. All our static media is stored on S3, and basically it takes a while for the app to check if thumbnails have been created every time a page is loaded. To alleviate this problem, I'm caching the output of the templates w/ memcached. Over the course of an hour or two, the site's speed goes down significantly, until I restart apache, and then all is good for a little while. I have very little sysadmin experience, and was hoping somebody could at least point me in the right direction.

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  • Why do Apache access logs - timer resolution issue?

    - by Rob
    When going through Apache 2.2 access logs, logging with the %D directive (The time taken to serve the request, in microseconds), that it's very common for a 200 response to have a given number of bytes, but a "time to serve" of zero. For example, a given URL might be requested 10 times in a single day, and a 200 response is sent for them all, and all return, say 1000 bytes. However, 7 of them have a "time to serve" of zero, while the other 3 have a time to serve of 1 second. Is this simply because the request was served faster than the resolution of the timer Apache uses?

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  • apache: lists of all directives for a context?

    - by ajsie
    in the apache online documentation each directive could belong to a context eg: server-config, virtualhost, directory, .htaccess and so on. i wonder if there is a list of all directives belonging to each context? eg. a list with all directives for virtualhost so i know exactly which one i can use? and also, where can i find directives for apache modules? on their page or does each module has its own page with documentation (eg. mod_rewrite)?

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  • Apache logging: rotating logs on Win32?

    - by Jason S
    I was noticing my disk space disappearing faster than expected, and finally narrowed it down to a rewrite.log file that was 4 GB in size! Is there a way to rotate the various Apache logs (rewrite, error, access, etc.) on a Win32 PC so that only the most recent entries are there and I can limit the data size that results? I found the bit about log rotation on Apache's website but it's Unix-centric. Edit: I got rotatelogs.exe to work, and it's great except that it slows the server response down noticably so I rejected the idea of using it.

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  • Apache resolves all URLs to default

    - by Ariel
    I am using Apache 2.2 on a Debian-based distro. For some reason, all URLs are directed to the default index. No error or anything. That means: example.domain.com goes to domain.com. "example" can be just anything. In the default Vhost file (/etc/apache2/sites-available/default) I've added: ServerName: www.domain.com But it still keeps that odd behaviour. Please let me know how to enable the common, default behaviour. I haven't changed anything by the way, this is since installation. Update: Following SvW's answer, I am looking for a way to force Apache not to accept any URL, only those specified as VirtualHosts.

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  • Ubuntu 10.04 Apache Configuration for Websites

    - by completenoob
    Looking at a basic Ubuntu 10.04 server setup, Apache points to /var/www for where to it looks for files to serve up. The default apache user is www. I'm just trying to set up a plain old WordPress blog. Should I just dump the files into /var/www/ as root or www? User www seems inconvenient since I won't log in as the user, but I guess I can chown the files in /var/www to www. Not that I would log in as root either, but what is the recommended user who should own the /var/www files? Thanks for the help.

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  • how to read input with multiple lines in java

    - by Gandalf StormCrow
    Hi all, Our professor is making us do some basic programming with java, he gaves a website and everything to register and submit our questions, for today I need to do this one example I feel like I'm on the right track but I just can't figure out the rest .. here is the actualy question : **Sample Input:** 10 12 10 14 100 200 **Sample Output:** 2 4 100 And here is what I've got so far : public class Practice { public static int calculateAnswer(String a, String b) { return (Integer.parseInt(b) - Integer.parseInt(a)); } public static void main(String[] args) { System.out.println(calculateAnswer(args[0], args[1])); } } Now I always get the answer 2 because I'm reading the single line, how can I take all lines into account? thank you For some strange reason everytime I want to execute I get this error: C:\sonic>java Practice.class 10 12 Exception in thread "main" java.lang.NoClassDefFoundError: Fact Caused by: java.lang.ClassNotFoundException: Fact.class at java.net.URLClassLoader$1.run(URLClassLoader.java:20 at java.security.AccessController.doPrivileged(Native M at java.net.URLClassLoader.findClass(URLClassLoader.jav at java.lang.ClassLoader.loadClass(ClassLoader.java:307 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher. at java.lang.ClassLoader.loadClass(ClassLoader.java:248 Could not find the main class: Practice.class. Program will exit. Whosever version of answer I use I get this error, what do I do ? However if I run it in eclipse Run as Run Configuration - Program arguments 10 12 10 14 100 200 I get no output EDIT I have made some progress, at first I was getting the compilation error, then runtime error and now I get wrong answer , so can anybody help me what is wrong with this : import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.math.BigInteger; public class Practice { public static BigInteger calculateAnswer(String a, String b) { BigInteger ab = new BigInteger(a); BigInteger bc = new BigInteger(b); return bc.subtract(ab); } public static void main(String[] args) throws IOException { BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in)); String line; while ((line = stdin.readLine()) != null && line.length()!= 0) { String[] input = line.split(" "); if (input.length == 2) { System.out.println(calculateAnswer(input[0], input[1])); } } } }

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  • NoHostAvailableException With Cassandra & DataStax Java Driver If Large ResultSet

    - by hughj
    The setup: 2-node Cassandra 1.2.6 cluster replicas=2 very large CQL3 table with no secondary index Rowkey is a UUID.randomUUID().toString() read consistency set to ONE Using DataStax java driver 1.0 The request: Attempting to do a table scan by "SELECT some-col from schema.table LIMIT nnn;" The fail: Once I go beyond a certain nnn LIMIT, I start to get NoHostAvailableExceptions from the driver. It reads like this: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /10.181.13.239 ([/10.181.13.239] Unexpected exception triggered)) at com.datastax.driver.core.exceptions.NoHostAvailableException.copy(NoHostAvailableException.java:64) at com.datastax.driver.core.ResultSetFuture.extractCauseFromExecutionException(ResultSetFuture.java:214) at com.datastax.driver.core.ResultSetFuture.getUninterruptibly(ResultSetFuture.java:169) at com.jpmc.es.rtm.storage.impl.EventExtract.main(EventExtract.java:36) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120) Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /10.181.13.239 ([/10.181.13.239] Unexpected exception triggered)) at com.datastax.driver.core.RequestHandler.sendRequest(RequestHandler.java:98) at com.datastax.driver.core.RequestHandler$1.run(RequestHandler.java:165) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) Given: This is probably not the most enlightened thing to do to a large table with millions of rows, but this is how I learn what not to do, so I would really appreciate someone who could volunteer how this kind of error can be debugged. For example, when this happens, there are no indications that the nodes in the cluster ever had an issue with the request (there is nothing in the logs on either node that indicate any timeout or failure). Also, I enabled the trace on the driver, which gives you some nice autotrace (ala Oracle) info as long as the query succeeds. But in this case, the driver blows a NoHostAvailableException and no ExecutionInfo is available, so tracing has not provided any benefit in this case. I also find it interesting that this does not seem to be recorded as a timeout (my JMX consoles tell me no timeouts have occurred). So, I am left not understanding WHERE the failure is actually occurring. I am left with the idea that it is the driver that is having a problem, but I don't know how to debug it (and I would really like to). I have read several posts from folks that state that query'g for resultSets 10000 rows is probably not a good idea, and I am willing to accept this, but I would like to understand what is causing the exception and where the exception is happening. FWIW, I also tried bumping the timeout properties in the cassandra.yaml, but this made no difference whatsoever. I welcome any suggestions, anecdotes, insults, or monetary contributions for my registration in the house of moron-developers. Regards!!

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  • Effectively implementing a game view using java

    - by kdavis8
    I am writing a 2d game in java. The game mechanics are similar to the Pokémon game boy advance series e.g. fire red, ruby, diamond and so on. I need a way to draw a huge map maybe 5000 by 5000 pixels and then load individual in game sprites to across the entirety of the map, like rendering a scene. Game sprites would be things like terrain objects, trees, rocks, bushes, also houses, castles, NPC's and so on. But i also need to implement some kind of camera view class that focuses on the player. the camera view class needs to follow the characters movements throughout the game map but it also needs to clip the rest of the map away from the user's field of view, so that the user can only see the arbitrary proximity adjacent to the player's sprite. The proximity's range could be something like 500 pixels in every direction around the player’s sprite. On top of this, i need to implement an independent resolution for the game world so that the game view will be uniform on all screen sizes and screen resolutions. I know that this does sound like a handful and may fall under the category of multiple questions, but the questions are all related and any advice would be very much appreciated. I don’t need a full source code listing but maybe some pointers to effective java API classes that could make doing what i need to do a lot simpler. Also any algorithmic/ design advice would greatly benefit me as well. example of what i am trying to do in source code form below package myPackage; /** * The Purpose of GameView is to: Render a scene using Scene class, Create a * clipping pane using CameraView class, and finally instantiate a coordinate * grid using Path class. * * Once all of these things have been done, GameView class should then be * instantiated and used jointly with its helper classes. CameraView should be * used as the main drawing image. CameraView is the the window to the game * world.Scene passes data constantly to CameraView so that the entire map flows * smoothly. Path uses the x and y coordinates from camera view to construct * cells for path finding algorithms. */ public class GameView { // Scene is a helper class to game view. it renders the entire map to memory // for the camera view. Scene scene; // Camera View is a helper class to game view. It clips the Scene into a // small image that follows the players coordinates. CameraView Camera; // Path is a helper class to game view. It observes and calculates the // coordinates of camera view and divides them into Grids/Cells for Path // finding. Path path; // this represents the player and has a getSprite() method that will return // the current frame column row combination of the passed sprite sheet. Sprite player; }

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  • Article: Interceptors 1.1 in Java EE 6

    - by OracleTechnologyNetwork
    This Tip Of The Day (TOTD) attempts to explain the basics of Interceptors 1.1 - a "new" specification introduced in the Java EE 6. Interceptors do what they say - they intercept on invocations and lifecycle events on an associated target class. The specification is not entirely new as the concept is borrowed from the EJB 3.0 specification.

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  • StackWrap4J Java wrapper

    - by Bill the Lizard
    The StackWrap4J 1.0.1 jar is now available! (See the changelog) Sample Code / Screen Shot The following code snippet was used to test the wrapper in the Android emulator: TextView text = (TextView)findViewById(R.id.output); StackWrapper stackWrap = new StackOverflow(); String displayText = null; try { Stats stats = stackWrap.getStats(); displayText = "Stack Overflow Statistics"; displayText += "\nTotal Questions: " + stats.getTotalQuestions(); displayText += "\nTotal Unanswered: " + stats.getTotalUnanswered(); displayText += "\nTotal Answers: " + stats.getTotalAnswers(); displayText += "\nTotal Comments: " + stats.getTotalComments(); displayText += "\nTotal Votes: " + stats.getTotalVotes(); displayText += "\nTotal Users: " + stats.getTotalUsers(); } catch(Exception e){ displayText = e.getMessage(); } text.setText(displayText); About StackWrap4J is a Java wrapper for the Stack Exchange API. It is designed to be easy to use, and intuitive to learn while providing the full functionality of the API. License StackWrap4J is available under the MIT license. Download StackWrap4J Platform StackWrap4J was built using Java 1.5 and tested on Sun's JVM. It should run on any implementation of the JVM (1.5 or later). It's also been tested on the Android emulator. It also runs under the Google App Engine. Code You can download the code from our SVN repository hosted on SourceForge. Documentation for the code is also available on the SourceForge site. Authors Bill Cruise Justin Nelson Contact Please feel free to leave feedback here in the Answers section or on the StackWrap4J project discussion forum. Alternatively: Bill is available at: lizard.bill (at) gmail.com Justin can be reached at: jjnguy13 (at) gmail.com Future Currently we are focusing on adding more tests and fixing bugs. We are also working on adding serialization so that our objects can be easily persisted, and throttling so that users of our library don't have to worry about breaking the terms of use of the API. Notes The latest build was tested against version 1.0 of the API on July 28th.

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  • Java hosting service provider?

    - by Rahul Utb
    I want to host a Java web application. How to decide which hosting service provider to choose from. Is there any source of info where from I can get such info. Yes most important, being from India which service provider service should I use, from those who say there servers are located in US or they who say their servers are located in India itself. Thanks in advance from any suggestion/reply to this query.

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  • Which Java-specific annoyance fixed in Scala reduces surprises like the ones discussed in Java Puzzl

    - by soc
    Example: In Java this code falls through and prints "Mhhh..." Integer i = new Integer(1); Integer j = new Integer(1); if (i == j) { System.out.println("Equal"); } else if (i < j) { System.out.println("Smaller"); } else if (i > j) { System.out.println("Bigger"); } else {System.out.println("Mhhh...");} In Scala the equivalent code does not even compile: val a = new Integer(1) val b = new Integer(1) println { if(a == b) "Equal" else if(a < b) "Smaller" else if (a > b) "Bigger" else "Mhhh..."}

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  • Problem by installing Java

    - by Shagun
    Yesterday night I was trying to download Java as per instructions given on http://developer.android.com/ .But I messed up somewhere and had to give up the thing. But since morning when ever I try to install or remove some thing I get the following response http://paste.ubuntu.com/1198084/ Please help fast. I am a newbie in android development and have to submit an app within 5 days from now for a project. And I need my linux machine working fine for that.

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  • Practicing Java Swing

    - by user1265125
    I've been learning Java by myself through many different online and offline resources. I just finished some basic practice and theoretical knowledge of Swing. Now, to become good at it I need some practice problems which would test my Swing skills, including GUI Building, listeners etc. But I can't figure out where to find such questions/problems for my practice. Do you guys know of an online resource? Some book would also do...

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  • C++ track or Java track in college?

    - by sq1020
    I'm starting some CS classes at a community college and they have two tracks. Either you take three courses in C++ or three courses in Java. Both cover the same fundamental material e.g. data structures, algorithms etc. Which would you recommend considering that I know python and may be consider doing a masters in CS some time down the road....my undergrad degree is in something else. And advice would be appreciated.

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