Threads with "state = BLOCKED" are indicating that they have been
suspended (Object.wait). It's not a deadlock or something. If required,
they will be resumed and suspended again as soon as their work is done.
But they will not be terminated until the application is going to
terminate.
You can use the code below in order to approve that the threads will be
terminated properly if the application is going to terminate:
class WorkerThreadObserver extends Thread {
public WorkerThreadObserver() {
this.start();
}
public void run() {
while ( !application().isTerminating() ) {
try {
sleep(100);
}
catch(Exception e) {}
}
while ( workerThreadCount().intValue() >
workerThreadCountMin().intValue() ) {
try {
sleep(100);
}
catch(Exception e) {}
}
System.out.println("Worker Thread Count (should be
WOWorkerThreadCountMin now) = " + workerThreadCount());
}
}
Usage:
new WorkerThreadObserver(); // e.g. in the applications constructor
>>> Kristof Cossement <kristof.cossem...@nss.be> schrieb am Donnerstag,
15. Oktober
2009 um 10:38 in Nachricht
<7d25e3e8-e3a6-49a6-8116-1535a3c1b...@nss.be>:
> I included the stack from jstack:
>
> they all look like :
>
> Thread t...@78339: (state = BLOCKED)
> - java.net.PlainSocketImpl.accept(java.net.SocketImpl) @bci=0,
> line=382 (Interpreted frame)
> - java.net.ServerSocket.implAccept(java.net.Socket) @bci=50,
> line=450 (Interpreted frame)
> - java.net.ServerSocket.accept() @bci=48, line=421 (Interpreted
frame)
> - com.webobjects.appserver._private.WOWorkerThread.run() @bci=26,
> line=210 (Compiled frame)
> - java.lang.Thread.run() @bci=11, line=613 (Interpreted frame)
>
>
>
>
>
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