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Posted to dev@qpid.apache.org by "Keith Wall (JIRA)" <ji...@apache.org> on 2016/04/08 13:26:25 UTC
[jira] [Resolved] (QPID-7186) CancelledKeyException from the
accepting thread during Broker shutdown
[ https://issues.apache.org/jira/browse/QPID-7186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Keith Wall resolved QPID-7186.
------------------------------
Resolution: Fixed
> CancelledKeyException from the accepting thread during Broker shutdown
> ----------------------------------------------------------------------
>
> Key: QPID-7186
> URL: https://issues.apache.org/jira/browse/QPID-7186
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: qpid-java-6.0.1
> Reporter: Keith Wall
> Assignee: Keith Wall
> Priority: Minor
> Fix For: qpid-java-6.0.2, qpid-java-6.1
>
>
> The following failure occurred during an Apache CI run:
> https://builds.apache.org/view/M-R/view/Qpid/job/Qpid-Java-Java-MMS-6.0.x-TestMatrix/lastCompletedBuild/jdk=JDK%201.7%20(latest),label=Ubuntu,profile=java-mms.0-10/artifact/6.0.x/systests/target/surefire-reports/TEST-org.apache.qpid.transport.ProtocolNegotiationTest.testWrongProtocolHeaderSent_BrokerRespondsWithSupportedProtocol.txt
> The error occurred during the Broker shutdown. The SelectorThread had cancelled the key corresponding to the accepting port, and then failed when iterating the previously returned selector keys ({{SelectorThread.SelectionTask#processSelectionKeys}}) .
> We can tell from the logs that no connections existed to the Broker at the point of shutdown, so the only key registered on the selector must have been the accepting port.
> It seems that the Broker must has received a incoming connection to the accepting port around the time of shutdown and this meant that the selector returned the acceptor as just of the selected set. This was then processed after the key was cancelled, causing the exception.
> {noformat}
> 2016-04-05 21:35:48,683 DEBUG [Selector-Port-amqp] o.a.q.s.t.SelectorThread Cancelling selector on accepting port /0:0:0:0:0:0:0:0:15672
> ...
> 2016-04-05 21:35:48,706 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) ~[na:1.7.0_80]
> at sun.nio.ch.SelectionKeyImpl.readyOps(SelectionKeyImpl.java:87) ~[na:1.7.0_80]
> at java.nio.channels.SelectionKey.isAcceptable(SelectionKey.java:360) ~[na:1.7.0_80]
> at org.apache.qpid.server.transport.SelectorThread$SelectionTask.processSelectionKeys(SelectorThread.java:167) ~[qpid-broker-core-6.0.2-SNAPSHOT.jar:6.0.2-SNAPSHOT]
> at org.apache.qpid.server.transport.SelectorThread$SelectionTask.performSelect(SelectorThread.java:306) ~[qpid-broker-core-6.0.2-SNAPSHOT.jar:6.0.2-SNAPSHOT]
> at org.apache.qpid.server.transport.SelectorThread$SelectionTask.run(SelectorThread.java:87) ~[qpid-broker-core-6.0.2-SNAPSHOT.jar:6.0.2-SNAPSHOT]
> at org.apache.qpid.server.transport.SelectorThread.run(SelectorThread.java:463) ~[qpid-broker-core-6.0.2-SNAPSHOT.jar:6.0.2-SNAPSHOT]
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) ~[na:1.7.0_80]
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) ~[na:1.7.0_80]
> at java.lang.Thread.run(Thread.java:745) ~[na:1.7.0_80]
> {noformat}
> This defect is not likely to cause impact to a production user.
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