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https://issues.apache.org/jira/browse/HTTPCORE-118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12531348
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Oleg Kalnichevski commented on HTTPCORE-118:
--------------------------------------------
Halo,
> should close the socket and release all resources hold by the connection if
> the client close the socket firstly, right?
Because it takes a while to detect that a connection has been closed. So, while
you are bombarding the server with thousands of new connection requests JVM may
simply run out of memory because the server has to keep lots of connection
alive assuming the client intends to re-use them.
There have been numerous changes in HttpCore since alpha5. Could you please
re-test your application against SVN trunk. I'll try to reproduce the problem
locally using your latest test application.
Oleg
> Some strange issue under a heavy stress test
> ---------------------------------------------
>
> Key: HTTPCORE-118
> URL: https://issues.apache.org/jira/browse/HTTPCORE-118
> Project: HttpComponents Core
> Issue Type: Bug
> Components: Examples, HttpCore, HttpCore NIO
> Affects Versions: 4.0-alpha5
> Environment: Windows xp(sp2), JDK 1.5
> Reporter: Halo chen
> Priority: Critical
> Fix For: 4.0-alpha5
>
> Attachments: a.txt, SendToIA.java, SendToIA.java, snapshot.jpg
>
>
> Thanks very much for your contributions.
> I use your httpcore to develop a embed web application, very well, I think.
> But, when i do some stress test, i find a strange issue, please see my test
> case:
> public class SendToIA implements Runnable {
> String[] args;
> SendToIA( String[] args )
> {
> this.args = args;
> }
> public void run()
> {
> try {
> FileInputStream fis = new FileInputStream("a.txt");
> int len = fis.available();
> byte[] buf = new byte[len];
> fis.read(buf);
> fis.close();
> String ReuestHead = "POST /TerminalLocationNotification
> HTTP/1.1\r\nHOST: LOCALHOST\r\nContent-Length: ";
> String ReuestLen = String.valueOf(len) + "\r\n\r\n";
> String RequestBody = new String(buf);
> String httpRequest = ReuestHead + ReuestLen +
> RequestBody;
> String host = "localhost";
> int port = 8086;
> if( args.length == 1 )
> {
> host = args[0];
> }
> else if( args.length == 2 )
> {
> host = args[0];
> port = Integer.parseInt( args[ 1 ] );
> }
>
> System.out.println(new java.util.Date());
> for (int i = 0; i < 20000; i++) {
> Socket connection = new Socket( host, port );
> connection.setReuseAddress( true );
> PrintWriter out = new
> PrintWriter(connection.getOutputStream(), true);
> out.print(httpRequest);
> out.flush();
> connection.close();
> System.out.print("\b\rcont:"+i);
> }
> System.out.println(new java.util.Date());
> } catch (SecurityException e) {
> e.printStackTrace();
> } catch (Exception e) {
> e.printStackTrace();
> }
> }
> public static void main(String[] args) throws IOException {
> int threadcount = 1;
> if( args.length == 3 )
> {
> threadcount = Integer.parseInt( args[ 2 ] );
> }
> Thread[] t = new Thread[ threadcount ];
> for( int i = 0 ; i < threadcount ; i ++ )
> {
> new Thread( new SendToIA( args ) ).start();
> }
> for( int i = 0 ; i < threadcount ; i ++ )
> {
> try{t[i].join();}catch( Exception e ){}
> }
> }
> }
> Unfortunately, the application was crashed.
> The first , I think my application has some mistake. so I run the example(
> org.apache.http.examples.nio.NHttpServer) in the HttpCore binary package.
> Oh,No!
> The same issue was occured!
> Why? I found the memory usage of the application reach 170M!!, and then I add
> the JVM parameter -Xmx256M.Okay, the application can running continue. but
> after a long time, the memory usage of the application reach 256M and then
> the same thing was occured! So , I think that the HttpCore has some memory
> leak.
> Can you give me some advices to resolve this issue? or I have some mistakes?
> details of error occured:
> ...
> Exception in thread "I/O reactor worker thread 2" java.lang.OutOfMemoryError:
> Java heap space
> ....
> java.lang.NullPointerException
> at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.verifyWorkers(AbstractMultiworkerIOReactor.java:136)
> at
> org.apache.http.impl.nio.reactor.DefaultListeningIOReactor.execute(DefaultListeningIOReactor.java:111)
> ....
> Exception in thread "I/O reactor worker thread 8" java.lang.OutOfMemoryError:
> Java heap space
> Exception in thread "Thread-6" java.lang.OutOfMemoryError: Java heap space
> Sorry , I'm chinese , my english is bad, may be i haven't explain the issue
> clearly. but I need your help.
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