Java memory leak on Red Hat, but memory leak on Mac OS X

Question

I have a java webobjects application that shows memory leak problems while working on Red Hat, but we didn’t have such problems when it worked on Mac OS X. The JVMs are similar.

Mac OS X 10.6.5 using java 1.6.0_22 64 bit from Apple Red Hat EL 5.0 using java 1.6.0_20 64 bit from Sun

I configured it to dump the heap when it ran out of memory, and analyzing it with the eclipse memory analysis tool suggests that the problem is part of the code that creates the stream that sends the HTTP request to the service network. The reason for creating the stream is that the request timed out because the web service is sometimes unavailable.

Does anyone have any ideas?

    WOHTTPConnection connection = new WOHTTPConnection(host, port);
    WORequest request = new WORequest(strMethod, strQuery, strHttpVersion, nsdHeader, content, null);

    WebServiceRequester theRequester = new WebServiceRequester(connection, request);
    Thread requestThread = new Thread(theRequester);
    requestThread.start();
    try {
            requestThread.join(intTimeoutSend);  //timeout in milliseconds = 10000
            if ( requestThread.isAlive() ) {
                requestThread.interrupt();
            }
    } catch(InterruptedException e) { 

    }
    requestThread = null;
    if(!theRequester.getTfSent()) {
           return null;
    }
    WOResponse response = connection.readResponse();

...

class WebServiceRequester implements Runnable {

    private WORequest theRequest;
    private WOHTTPConnection theConnection;
    private boolean tfSent = false;

    public WebServiceRequester(WOHTTPConnection c, WORequest r) {
        theConnection = c;
        theRequest = r;
    }

    public void run() {
        tfSent = theConnection.sendRequest(theRequest);
    }

    public boolean getTfSent() {
        return tfSent;
    }
}

EDIT: , eclipse:

1,296 instances of "java.lang.Thread", loaded by "<system class loader>" occupy 111,947,632 (43.21%) bytes.
1,292 instances of "er.extensions.eof.ERXEC", loaded by "java.net.URLClassLoader @ 0x2aaab375b7c0" occupy 37,478,352 (14.46%) bytes.
1,280 instances of "er.extensions.appserver.ERXRequest", loaded by "java.net.URLClassLoader @ 0x2aaab375b7c0" occupy 27,297,992 (10.54%) bytes.

Answer 1

, WOHTTPConnection . WOHTTPConnection . .

, Apache HttpComponents HttpClient

Answer 2

WOHTTPConnection? ( API...).

Followup

, , connection.readResponse() , .

@Rudiger - , connection.readResponse() . , , , . ( - , .)

, finally... .

, WOHTTPConnection.

Answer 3

, , Thread.interrupt Thread. JVM , .

closeConnection Thread.interrupt. , , , IO, :

WOHTTPConnection connection = new WOHTTPConnection(host, port);
WORequest request = new WORequest(strMethod, strQuery, strHttpVersion, nsdHeader, content, null);

WebServiceRequester theRequester = new WebServiceRequester(connection, request);
Thread requestThread = new Thread(theRequester);
requestThread.start();
try {
        requestThread.join(intTimeoutSend);  //timeout in milliseconds = 10000
        if ( requestThread.isAlive() ) {
            requestThread.closeConnection();
            requestThread.interrupt();
        }
} catch(InterruptedException e) { 

}
requestThread = null;
if(!theRequester.getTfSent()) {
       return null;
}
WOResponse response = connection.readResponse();

...

class WebServiceRequester implements Runnable {

    private WORequest theRequest;
    private WOHTTPConnection theConnection;
    private boolean tfSent = false;

    public WebServiceRequester(WOHTTPConnection c, WORequest r) {
        theConnection = c;
        theRequest = r;
    }

    public void run() {
        tfSent = theConnection.sendRequest(theRequest);
    }

    public boolean getTfSent() {
        return tfSent;
    }

    public void closeConnection() {
        this.theConnection.close();
    }

}