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https://issues.apache.org/jira/browse/QPID-7909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16198582#comment-16198582
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Alex Rudyy commented on QPID-7909:
----------------------------------
Here is another stack trace for unhandled CancelledKeyException
{noformat}
java.nio.channels.CancelledKeyException: null
at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:73)
at sun.nio.ch.SelectionKeyImpl.interestOps(SelectionKeyImpl.java:82)
at
java.nio.channels.spi.AbstractSelectableChannel.register(AbstractSelectableChannel.java:204)
at
org.apache.qpid.server.transport.SelectorThread$SelectionTask.reregisterUnregisteredConnections(SelectorThread.java:269)
at
org.apache.qpid.server.transport.SelectorThread$SelectionTask.performSelect(SelectorThread.java:326)
at
org.apache.qpid.server.transport.SelectorThread$SelectionTask.run(SelectorThread.java:97)
at
org.apache.qpid.server.transport.SelectorThread.run(SelectorThread.java:521)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{noformat}
> [Java Broker] CancelledKeyException can be thrown from a selector thread when
> accepting new connection on Broker shutdown
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: QPID-7909
> URL: https://issues.apache.org/jira/browse/QPID-7909
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: qpid-java-broker-7.0.0
> Reporter: Alex Rudyy
> Priority: Minor
> Fix For: Future
>
> Attachments:
> TEST-org.apache.qpid.systest.management.amqp.AmqpManagementTest.testCreateQueueOnBrokerManagement.txt
>
>
> {{CancelledKeyException}} can be reported on broker shutdown when a new
> incoming connection is about to be accepted. The exception crashes the broker
> as it is not handled anywhere.
> The following thread stack trace is reported into broker logs
> {noformat}
> 2017-09-10 15:54:48,118 ERROR [Selector-Port-amqp]
> o.a.q.t.u.InternalBrokerHolder Uncaught exception from thread
> Selector-Port-amqp
> java.nio.channels.CancelledKeyException: null
> at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:73)
> at sun.nio.ch.SelectionKeyImpl.readyOps(SelectionKeyImpl.java:87)
> at java.nio.channels.SelectionKey.isAcceptable(SelectionKey.java:360)
> at
> org.apache.qpid.server.transport.SelectorThread$SelectionTask.processSelectionKeys(SelectorThread.java:180)
> at
> org.apache.qpid.server.transport.SelectorThread$SelectionTask.performSelect(SelectorThread.java:319)
> at
> org.apache.qpid.server.transport.SelectorThread$SelectionTask.run(SelectorThread.java:97)
> at
> org.apache.qpid.server.transport.SelectorThread.run(SelectorThread.java:521)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> The broker log does not contain the logs for selector cancellation in
> {{SelectorThread#cancelAcceptingSocketAsync}} for amqp port. It does not look
> like selector was cancelled from Qpid code
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