users@grizzly.java.net

Re: Grizzly/Comet GF V3 hangs

From: Jeanfrancois Arcand <Jeanfrancois.Arcand_at_Sun.COM>
Date: Mon, 23 Mar 2009 19:11:55 +0100

Salut,

gustav trede wrote:
>
> so your overwhelming the log at info level from the onEvent method, all
> cometworker threads are waiting inside the logger.

Indeed! Adding Carla to the thread as she might now why:

> CometWorker-7" daemon prio=6 tid=0x075c9400 nid=0x2198 waiting on condition [0x0fc8f000..0x0fc8fc68]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x1c8b3988> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
> at java.util.concurrent.ArrayBlockingQueue.put(ArrayBlockingQueue.java:252)
> at com.sun.enterprise.server.logging.GFFileHandler.publish(GFFileHandler.java:509)
> at java.util.logging.Logger.log(Logger.java:472)
> at java.util.logging.Logger.doLog(Logger.java:494)
> at java.util.logging.Logger.log(Logger.java:517)
> at java.util.logging.Logger.info(Logger.java:1036)
> at com.bcs.mm.model.EventSubscriber.onEvent(EventSubscriber.java:99)
> at com.sun.grizzly.comet.concurrent.DefaultConcurrentCometHandler.EnQueueEvent(DefaultConcurrentCometHandler.java:152)
> at com.sun.grizzly.comet.DefaultNotificationHandler.notify0(DefaultNotificationHandler.java:179)
> at com.sun.grizzly.comet.DefaultNotificationHandler$2.run(DefaultNotificationHandler.java:142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:619)

I don't think this is a bug in Grizzly IMO, but a problem with the
logger in GlassFish (hence the micro benchmark we have in Grizzly cannot
catch it).

Thanks!

-- Jeanfrancois


>
>
> 2009/3/23 felixx <dolaru_at_sympatico.ca <mailto:dolaru_at_sympatico.ca>>
>
>
>
> File attached, thanks.
>
>
> felixx wrote:
> >
> > GF V3 build 41, Win Vista, Java HotSpot(TM) Server VM (10.0-b19) for
> > windows-x86 JRE (1.6.0_05-b13);
> > Simple Comet test scenario: 100 java streaming clients connected
> to the
> > same Comet context, 1 event is posted to the context every second.
> > Works fine for approx 50-60 seconds then the server hangs. Nothing is
> > pushed to the clients anymore, no request is served on 8080 or 4848
> > (tested via browser), the server is dead.
> > Looks like a random/race condition.
> >
> >
>
> http://www.nabble.com/file/p22664213/stack.txt stack.txt
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> regards
> gustav trede
>
>