sorry, i meant to reply this to [email protected], didnt realize that this points only to thomas
thanx ---------- Forwarded message ---------- From: kim young ill <[email protected]> Date: Tue, Apr 17, 2012 at 8:09 PM Subject: Re: [jetty-users] high cpu load NIO (Jetty7.6.0) To: Thomas Becker <[email protected]> hi there, no one seems to have the same issue ? i switched back to blocking IO & dont have this problem anymore. thanx On Mon, Apr 2, 2012 at 1:15 PM, kim young ill <[email protected]> wrote: > hi there, > update to 7.6.2 doesnt seem to solve our problem, cpu gets up stays there > after some days again, > with the tool from here > > http://weblogs.java.net/blog/brucechapman/archive/2008/03/hot_threads.html > > this is what i got (same problem with Selector thread): > > 47.0% CPU Usage by Thread 'qtp650519471-16 Selector0' > 3/10 snapshots sharing following 10 elements > > sun.nio.ch.EPollArrayWrapper.epollWait(Native Method) > sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:210) > sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65) > sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69) > sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80) > > org.eclipse.jetty.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:564) > > org.eclipse.jetty.io.nio.SelectorManager$1.run(SelectorManager.java:285) > > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) > > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) > java.lang.Thread.run(Thread.java:662) > 3/10 snapshots sharing following 11 elements > sun.nio.ch.EPollArrayWrapper.epollCtl(Native Method) > > sun.nio.ch.EPollArrayWrapper.updateRegistrations(EPollArrayWrapper.java:246) > sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:209) > sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65) > sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69) > sun.nio.ch.SelectorImpl.selectNow(SelectorImpl.java:88) > > org.eclipse.jetty.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:531) > > > org.eclipse.jetty.io.nio.SelectorManager$1.run(SelectorManager.java:285) > > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) > > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) > java.lang.Thread.run(Thread.java:662) > 4/10 snapshots sharing following 4 elements > > > org.eclipse.jetty.io.nio.SelectorManager$1.run(SelectorManager.java:285) > > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) > > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) > java.lang.Thread.run(Thread.java:662) > > 12.0% CPU Usage by Thread 'qtp650519471-27914' > 10/10 snapshots sharing following 8 elements > sun.misc.Unsafe.park(Native Method) > java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196) > > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025) > > org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:337) > > org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:517) > > org.eclipse.jetty.util.thread.QueuedThreadPool.access$600(QueuedThreadPool.java:39) > > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:563) > java.lang.Thread.run(Thread.java:662) > > 12.0% CPU Usage by Thread 'qtp650519471-27909' > 9/10 snapshots sharing following 8 elements > sun.misc.Unsafe.park(Native Method) > java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196) > > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025) > > org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:337) > > org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:517) > > org.eclipse.jetty.util.thread.QueuedThreadPool.access$600(QueuedThreadPool.java:39) > > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:563) > java.lang.Thread.run(Thread.java:662) > > > /// > i suspected that we got hit by this bug: > http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6525190 > > but testing on our jvm (1.6 update 31) shows that it's not the issue. > > the difference on 7.6.2 is that we dont see this kind of message anymore > even when cpu get high: > > Selector org.eclipse.jetty.io.nio.SelectorManager$SelectSet@7413a356keys=8 > selected=0 is too busy, pausing! > > thanx > > > > > > > On Sat, Mar 10, 2012 at 12:06 PM, kim young ill <[email protected]>wrote: > >> the servers are still running ( slow thou) & we cannot restart it yet, >> but i'll test it on a test server & let you know in any case. >> >> by the way, on one of the machine which spins which has fine-log, this >> message fill the logs endless, dont know if it helps to narrow the issue: >> >> >> 2012-03-10 10:51:19,740 AsyncHttpConnection-qtp986381142-19351 [INFO ] >> EndPoint making no progress: -1807095600 SSL NEED_WRAP i/o/u=0/0/714 >> ishut=false oshut=true >> {AsyncHttpConnection@7816f7f,g=HttpGenerator{s=0,h=-1,b=-1,c=-1},p=HttpParser{s=0,l=0,c=-3},r=0} >> AsyncHttpConnection@7816f7f >> ,g=HttpGenerator{s=0,h=-1,b=-1,c=-1},p=HttpParser{s=0,l=0,c=-3},r=0 >> >> >> >> thanx >> >> >> >> >> On Mon, Mar 5, 2012 at 5:25 PM, Thomas Becker <[email protected]>wrote: >> >>> Hi, >>> >>> could you please upgrade to the most recent jetty version and report >>> back if that has fixed the problem? Some bugs causing cpu spins like this >>> have been fixed since 7.6.0. >>> http://download.eclipse.org/jetty/ >>> >>> Cheers, >>> Thomas >>> >>> >>> >>> >>> On 3/5/12 5:16 PM, kim young ill wrote: >>> >>> Hi there, >>> >>> after running for 2 days, we have suddenly high cpu (permanent 100%), >>> even there's no traffic, cpu usage wouldnt go down even there's no traffic. >>> >>> env: >>> jetty 7.6.0 (embedded) >>> linux 64bit (opensuse, kernel 2.6.37.1-1.2 >>> oracle-jdk 1.6.0.31 >>> >>> >>> from jconsole i got these 2 threads, each use 50-60% cpu: >>> >>> >>> sun.nio.ch.EPollArrayWrapper.epollWait(Native Method) >>> sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:210) >>> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65) >>> sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69) >>> sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80) >>> >>> org.eclipse.jetty.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:564) >>> org.eclipse.jetty.io.nio.SelectorManager$1.run(SelectorManager.java:285) >>> >>> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) >>> >>> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) >>> java.lang.Thread.run(Thread.java:662) >>> >>> >>> >>> sun.nio.ch.EPollArrayWrapper.interrupt(Native Method) >>> sun.nio.ch.EPollArrayWrapper.interrupt(EPollArrayWrapper.java:256) >>> sun.nio.ch.EPollSelectorImpl.wakeup(EPollSelectorImpl.java:175) >>> >>> org.eclipse.jetty.io.nio.SelectorManager$SelectSet.wakeup(SelectorManager.java:817) >>> >>> org.eclipse.jetty.io.nio.SelectChannelEndPoint.updateKey(SelectChannelEndPoint.java:520) >>> >>> org.eclipse.jetty.io.nio.SelectChannelEndPoint.close(SelectChannelEndPoint.java:698) >>> org.eclipse.jetty.io.nio.SslConnection.process(SslConnection.java:377) >>> org.eclipse.jetty.io.nio.SslConnection.access$900(SslConnection.java:43) >>> >>> org.eclipse.jetty.io.nio.SslConnection$SslEndPoint.flush(SslConnection.java:718) >>> >>> org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:85) >>> org.eclipse.jetty.io.nio.SslConnection.handle(SslConnection.java:191) >>> >>> org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:609) >>> >>> org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:45) >>> >>> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599) >>> >>> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534) >>> java.lang.Thread.run(Thread.java:662) >>> >>> >>> any hints ? >>> >>> thanx >>> >>> >>> >>> _______________________________________________ >>> jetty-users mailing >>> [email protected]https://dev.eclipse.org/mailman/listinfo/jetty-users >>> >>> >>> -- >>> thomas [email protected] >>> http://webtide.com / http://intalio.com >>> (the folks behind jetty and cometd) >>> >>> >> >
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