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From "Alex Rudyy (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (QPID-7001) [Java Broker] NullPointerException can be thrown from Port IO Thread
Date Fri, 19 Feb 2016 14:28:18 GMT

     [ https://issues.apache.org/jira/browse/QPID-7001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alex Rudyy resolved QPID-7001.
------------------------------
    Resolution: Fixed

The changes look reasonable

> [Java Broker] NullPointerException can be thrown from Port IO Thread
> --------------------------------------------------------------------
>
>                 Key: QPID-7001
>                 URL: https://issues.apache.org/jira/browse/QPID-7001
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Broker
>    Affects Versions: qpid-java-6.0, qpid-java-6.1
>            Reporter: Alex Rudyy
>            Priority: Critical
>             Fix For: qpid-java-6.0.1, qpid-java-6.1
>
>         Attachments: 0001-WIP-Add-system-test.patch, BrokerLoggingTest.tar.bz2, test.log.tar.gz
>
>
> I run into the following issue in my tests:
> {noformat}
> ########################################################################
> #
> # Unhandled Exception java.lang.NullPointerException in Thread IO-pool-Port-amqp-1
> #
> # Exiting
> #
> ########################################################################
> java.lang.NullPointerException
>  at org.apache.qpid.server.transport.SelectorThread$SelectionTask$1.run(SelectorThread.java:190)
>  at org.apache.qpid.server.transport.SelectorThread.run(SelectorThread.java:457)
>  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> {noformat}
> I've seen this exception occurring from time to time in the BDB HA test MultiNodeTest#testInFlightTransactionsWhilstMajorityIsLost
> It seems that NPE occurs on heavy loads when multiple connections are trying to restore
connectivity because of failover. The issue might affect users severely production deployments
of the 6.x brokers, as NPE kills the broker and manual intervention could be required to start-up
the broker



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