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https://issues.apache.org/jira/browse/HTTPCORE-169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12623454#action_12623454
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Anders Wallgren commented on HTTPCORE-169:
------------------------------------------
FYI, I deleted the other two patch files that only applied my log lines, so
they don't cause confusion with the patch that has the code change in it.
> ClosedChannelException causes IOReactor to shut down
> ----------------------------------------------------
>
> Key: HTTPCORE-169
> URL: https://issues.apache.org/jira/browse/HTTPCORE-169
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore NIO
> Affects Versions: 4.0-beta2
> Reporter: Anders Wallgren
> Priority: Critical
> Fix For: 4.0-beta3
>
> Attachments: HTTPCORE-169.patch
>
>
> I've finally had time to track down a problem that's been happening
> intermittently for the past few weeks.
> The symptom of the problem is that the IOReactor shuts down during one of our
> unit tests (always the same test).
> The test before the test that fails cancels an NIO session request before it
> completes, and I believe what might be happening is this session request ends
> up being processed by the IOReactor during the next test (the IOReactor
> remains running between these tests).
> AbstractIOReactor.processNewChannels calls
> AbstractSelectableChannel.configureBlocking, which throws a
> ClosedChannelException.
> AbstractIOReactor.processNewChannels reacts to this by throwing an
> IOReactorException, which in turn causes AbstractMultiworkerIOReactor.execute
> to call doShutdown.
> This is an expected error condition, so it shouldn't cause the IOReactor to
> exit.
> I'm including some supporting stack traces below -- note that I added some
> logging to the 4.0-beta2 code, so I'm also including patch files so line
> numbers can line up (though you probably won't need them -- the problem seems
> straightfoward to me).
> The ClosedChannelException happens:
> 2008-08-17T16:35:27.424 | DEBUG | ntHttpManager |
> | AbstractMultiworkerIOReactor | Worker exception in
> execute()
> org.apache.http.nio.reactor.IOReactorException: Failure registering channel
> with the selector
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processNewChannels(AbstractIOReactor.java:227)
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:158)
> at
> org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:70)
> at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:341)
> at java.lang.Thread.run(Thread.java:619)
> at
> com.electriccloud.util.queue.CommanderThread.run(CommanderThread.java:94)
> Caused by: java.nio.channels.ClosedChannelException
> at
> java.nio.channels.spi.AbstractSelectableChannel.configureBlocking(AbstractSelectableChannel.java:252)
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processNewChannels(AbstractIOReactor.java:224)
> ... 5 more
> Right after that, the shutdown happens:
> 2008-08-17T16:35:27.425 | INFO | ntHttpManager |
> | AbstractIOReactor | gracefulShutdown: [EMAIL
> PROTECTED]
> java.lang.Exception: Stack trace from gracefulShutdown
> at
> org.apache.http.impl.nio.reactor.AbstractIOReactor.gracefulShutdown(AbstractIOReactor.java:338)
> at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.doShutdown(AbstractMultiworkerIOReactor.java:240)
> at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:203)
> at
> com.electriccloud.commander.agent.AgentSocketManager.innerRun(AgentSocketManager.java:280)
> at
> com.electriccloud.util.FailsafeRunnable.run(FailsafeRunnable.java:136)
> at java.lang.Thread.run(Thread.java:619)
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