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https://issues.apache.org/jira/browse/DIRMINA-1054?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Valliere resolved DIRMINA-1054.
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Resolution: Unresolved
> High CPU lasting between 5-15 minutes during heavy load
> -------------------------------------------------------
>
> Key: DIRMINA-1054
> URL: https://issues.apache.org/jira/browse/DIRMINA-1054
> Project: MINA
> Issue Type: Bug
> Affects Versions: 2.0.15
> Environment: Linux
> Reporter: Dan Janosik
> Priority: Major
> Labels: performance
> Attachments: thread-dump.txt
>
>
> After upgrading from version 2.0.7 to 2.0.15 we experienced periods of 100%
> cpu usage in our production environment lasting approximately 5-15 minutes in
> length. Reverting to 2.0.7 resolved the issue. The issue was seen exclusively
> in the evenings during times of heavy usage, but the pattern of its
> occurrence was unclear. We obtained a thread dump which has been cleaned up
> to show only mina code and that is included below. Using VisualVM, we also
> ran the CPU sampler and got the following results:
> Mina CPU sampler entries in the top 10 during a 100% cpu period
> -----------------------
>
> org.apache.mina.filter.executor.OrderedThreadPoolExecutor:Worker.fetchSession()
> 60.4%
> org.apache.mina.transport.socket.nio.NioProcessor.select() 10.9%
> org.apache.mina.transport.socket.nio.NioProcessor.read() 3.2%
> org.apache.mina.core.pooling.AbstractPollingIoProcessor.access$700() 1.4%
> org.apache.mina.core.pooling.AbstractPollingIoProcessor.access$400() 1.1%
> Mina CPU sampler entries in the top 10 immediately after a 100% cpu period
> ended
> -----------------------
>
> org.apache.mina.filter.executor.OrderedThreadPoolExecutor:Worker.fetchSession()
> 72.5%
> org.apache.mina.transport.socket.nio.NioProcessor.select() 14.4%
> Thread dump is attached
>
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