Hello,
From time to time our as2 starts eating 100% cpu. This has happened in b25 and the issue is still in b27. I can't see any relation between each occurrence. Sometimes this happens during the night when there are no connections. It can happen after one day or after month from the AS2 start.
Linux, RH 4.4 ES
mec_AS b27
Does anyone observe something similar ?
uniks,
There are some third party products included in the AS2 server that may start threads, perhaps this is a database reorganization or something like this.
Regards
Heller
Hi again,
I'm still fighting with this issue,
currently I'm able to reproduce this by executing:
for i in `seq 1 1000`; do `wget http://sv-as2:8888/as2/ > /dev/null 2>&1`; done &
for i in `seq 1 1000`; do `wget http://sv-as2:8888/as2/ > /dev/null 2>&1`; done &
so, 2k request for index.html, this caused that AS2 starts using 100% cpu, even if all request finished.
I tried switch AS2 from sun java to jrockit, but the problem is also there. Using jrmc I trace two threads consuming this cpu:
Stack Trace
btpool0-7 - Acceptor1 SelectChannelConnector @ 0.0.0.0:8080 [36] (RUNNABLE)
java.lang.System.currentTimeMillis line: not available [native method]
org.mortbay.io.nio.SelectorManager$SelectSet.doSelect line: 312
org.mortbay.io.nio.SelectorManager.doSelect line: 73
org.mortbay.jetty.nio.SelectChannelConnector.accept line: 120
org.mortbay.jetty.AbstractConnector$Acceptor.run line: 498
org.mortbay.thread.BoundedThreadPool$PoolThread.run line: 475
Stack Trace
btpool0-7 - Acceptor1 SelectChannelConnector @ 0.0.0.0:8080 [36] (RUNNABLE)
sun.nio.ch.EPollArrayWrapper.epollWait line: not available [native method]
sun.nio.ch.EPollArrayWrapper.poll line: 215
sun.nio.ch.EPollSelectorImpl.doSelect line: 65
sun.nio.ch.SelectorImpl.lockAndDoSelect line: 69
sun.nio.ch.SelectorImpl.select line: 80
org.mortbay.io.nio.SelectorManager$SelectSet.doSelect line: 299
org.mortbay.io.nio.SelectorManager.doSelect line: 73
org.mortbay.jetty.nio.SelectChannelConnector.accept line: 120
org.mortbay.jetty.AbstractConnector$Acceptor.run line: 498
org.mortbay.thread.BoundedThreadPool$PoolThread.run line: 475
PS.
I tested this in b25, b27, b29
OS: Linux RH 4.4
tested with sun java jre1.6.0_11 and jrockit jrrt-4.0.0-1.6.0
miss click, the second thread was:
Stack Trace
btpool0-8 - Acceptor0 SelectChannelConnector @ 0.0.0.0:8080 [37] (RUNNABLE)
java.lang.System$2.blockedOn line: 1143
java.nio.channels.spi.AbstractInterruptibleChannel.blockedOn line: 191
java.nio.channels.spi.AbstractSelector.end line: 210
sun.nio.ch.EPollSelectorImpl.doSelect line: 67
sun.nio.ch.SelectorImpl.lockAndDoSelect line: 69
sun.nio.ch.SelectorImpl.select line: 80
org.mortbay.io.nio.SelectorManager$SelectSet.doSelect line: 299
org.mortbay.io.nio.SelectorManager.doSelect line: 73
org.mortbay.jetty.nio.SelectChannelConnector.accept line: 120
org.mortbay.jetty.AbstractConnector$Acceptor.run line: 498
org.mortbay.thread.BoundedThreadPool$PoolThread.run line: 475
uniks,
please update to the newest version of the mendelson opensource AS2 server.
Regards
Heller