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If you were logged in you would be able to see more operations.
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Environment:
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JDK 1.4.2_07, Windows 2000
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| Resolution Date: |
10/Apr/06 08:28 PM
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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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Description
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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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Show » |
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Bug
Closed
Major
Network disconnection (or initial connection) once SocketAcceptor is running causes 100% CPU consumption on Windows
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