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[jetty-users] Fwd: high cpu load NIO (Jetty7.6.0)
sorry, i meant to reply this to
jetty-users@xxxxxxxxxxx , didnt realize that this points only to thomas
thanx
---------- Forwarded message ----------
From:
kim young ill <khiemu@xxxxxxxxxxxxxx > Date: Tue, Apr 17, 2012 at 8:09 PM
Subject: Re: [jetty-users] high cpu load NIO (Jetty7.6.0)
To: Thomas Becker <
tbecker@xxxxxxxxxxx >
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
<khiemu@xxxxxxxxxxxxxx > 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@7413a356 keys=8
selected=0 is too busy, pausing! thanxOn Sat, Mar 10, 2012 at 12:06 PM, kim young ill
<khiemu@xxxxxxxxxxxxxx > 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
thanxOn Mon, Mar 5, 2012 at 5:25 PM, Thomas Becker
<tbecker@xxxxxxxxxxx > 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
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--
thomas becker
tbecker@xxxxxxxxxxx
http://webtide.com / http://intalio.com
(the folks behind jetty and cometd)