[jira] [Created] (QPID-7156) Possible Java Broker crash if connection is formed whilst virtualhost is stopping

["Keith Wall (JIRA)" <ji...@apache.org>]

Keith Wall created QPID-7156:
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             Summary: Possible Java Broker crash if connection is formed whilst virtualhost is stopping
                 Key: QPID-7156
                 URL: https://issues.apache.org/jira/browse/QPID-7156
             Project: Qpid
          Issue Type: Bug
          Components: Java Broker
    Affects Versions: qpid-java-6.0.1, qpid-java-6.0
            Reporter: Keith Wall
             Fix For: qpid-java-6.0.2, qpid-java-6.1



As reported here:

http://qpid.2158936.n2.nabble.com/Java-broker-crashes-after-stopping-vhost-td7640284.html

A race condition leads to the possibility of a NPE if the virtualhost is stopped as a new connection is formed.   In the unlucky case, the task to associate the connection with the virtualhost gets executed after the virtual host's network connection scheduler is shutdown.  This leads to a NPE. The Broker detects the NPE and shuts itself down.

{noformat}
2016-03-18 06:41:06,748 ERROR [IO-/172.24.102.24:51029] (o.a.q.s.Main) - Uncaught exception, shutting down.
java.lang.NullPointerException: null
                at org.apache.qpid.server.transport.NetworkConnectionScheduler.processConnection(NetworkConnectionScheduler.java:142) ~[qpid-broker-core-6.0.1.jar:6.0.1]
                at org.apache.qpid.server.transport.SelectorThread$ConnectionProcessor.processConnection(SelectorThread.java:505) ~[qpid-broker-core-6.0.1.jar:6.0.1]
                at org.apache.qpid.server.transport.SelectorThread$SelectionTask.performSelect(SelectorThread.java:338) ~[qpid-broker-core-6.0.1.jar:6.0.1]
                at org.apache.qpid.server.transport.SelectorThread$SelectionTask.run(SelectorThread.java:87) ~[qpid-broker-core-6.0.1.jar:6.0.1]
                at org.apache.qpid.server.transport.SelectorThread.run(SelectorThread.java:463) ~[qpid-broker-core-6.0.1.jar:6.0.1]
                at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) ~[na:1.8.0_51]
                at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ~[na:1.8.0_51]
                at java.lang.Thread.run(Unknown Source) ~[na:1.8.0_51]
"
{noformat}



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