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Posted to dev@mina.apache.org by "Simon Temple (JIRA)" <ji...@apache.org> on 2006/04/10 12:49:05 UTC
[jira] Commented: (DIRMINA-204) Network disconnection (or initial
connection) once SocketAcceptor is running causes 100% CPU consumption on
Windows
[ http://issues.apache.org/jira/browse/DIRMINA-204?page=comments#action_12373836 ]
Simon Temple commented on DIRMINA-204:
--------------------------------------
Apologies... this appears to be a problem when running Java 1.4.1
When running 1.4.2_07 we see very low CPU utilisation when the network is disabled and re-enabled.
I'd guess that the JDK 1.4.1 implementation of poll() spins out of control and 1.4.2 does not:
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(WindowsSelectorImpl.java:262)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(WindowsSelectorImpl.java:244)
at sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:127)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:62)
If anyone can educate me about this I'd be pleased to hear from them.
TIA
> Network disconnection (or initial connection) once SocketAcceptor is running causes 100% CPU consumption on Windows
> -------------------------------------------------------------------------------------------------------------------
>
> Key: DIRMINA-204
> URL: http://issues.apache.org/jira/browse/DIRMINA-204
> Project: Directory MINA
> Type: Bug
> Versions: 0.9.3
> Environment: JDK 1.4.2_07, Windows 2000
> Reporter: Simon Temple
>
> SocketAcceptorDelegate Thread appears to be skipping the Thread.Sleep() because the interrupted attribute of the Thread is set because the selector operation dropped through... I think ;-)
> "SocketAcceptor-0" prio=5 tid=0x1784FCD0 nid=0x92c runnable [1802f000..1802fd88]
> at java.lang.Thread.isInterrupted(Native Method)
> at java.lang.Thread.isInterrupted(Thread.java:771)
> at java.nio.channels.spi.AbstractSelector.begin(AbstractSelector.java:198)
> at sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:125)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:62)
> - locked <040E09F0> (a sun.nio.ch.SelectorImpl$Lock)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:67)
> at org.apache.mina.transport.socket.nio.support.SocketAcceptorDelegate$Worker.run(SocketAcceptorDelegate.java:326)
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