Keith Wall created QPID-7186:
--------------------------------
Summary: 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}
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