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Posted to dev@qpid.apache.org by "Keith Wall (Commented) (JIRA)" <ji...@apache.org> on 2012/01/13 17:31:39 UTC
[jira] [Commented] (QPID-3756)
ManagedConnectionMBeanTest.testChannels fails on 0-10 spawned profiles
[ https://issues.apache.org/jira/browse/QPID-3756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185657#comment-13185657 ]
Keith Wall commented on QPID-3756:
----------------------------------
Problem is that there is a race condition between the broker, closing the connection and unregistering the connection mbean and the test using the mbean to observe the number of connections. When the test fails, the test makes the observation too soon.
On the 0-10 path, the broker unregisters the mbean (ServerConnection#closed) only after the socket has been closed (IoReceiver.java:175). This is after the broker has sent the ConnectionCloseOk to the client, so the clients #close() call will have already returned control to the caller.
On 0-8..0-9-1 the unregister is done much earlier (AMQProtocolEngine#closeSession) which is invoked on receipt of ConnectionClose, i.e. before the ConnectionCloseOkBody is sent so the same problem cannot occur.
We could change 0-10 to unregister the mbean from ServerConnectionDelegate.connectionClose() i.e. before the ConnectionCloseOk is sent to the client. Opinions anyone?
{code}
main 2012-01-13 16:15:27,028 DEBUG [apache.qpid.transport.Connection] SEND: [conn:78dc9766] ch=0 ConnectionClose(replyCode=NORMAL)
main 2012-01-13 16:15:27,028 DEBUG [apache.qpid.transport.Connection] FLUSH: [conn:78dc9766]
BROKER: IoReceiver - /127.0.0.1:41093 2012-01-13 16:15:27,029 DEBUG [apache.qpid.transport.Connection] RECV: [conn:53e6978d] ch=0 ConnectionClose(replyCode=NORMAL)
BROKER: IoReceiver - /127.0.0.1:41093 2012-01-13 16:15:27,029 INFO [qpid.message.connection.close] [con:0(clientid@/127.0.0.1:41093/test)] [con:0(clientid@/127.0.0.1:41093/test)] CON-1002 : Close
BROKER: IoReceiver - /127.0.0.1:41093 2012-01-13 16:15:27,030 DEBUG [apache.qpid.transport.Connection] SEND: [conn:53e6978d] ch=0 ConnectionCloseOk()
BROKER: IoReceiver - /127.0.0.1:41093 2012-01-13 16:15:27,030 DEBUG [apache.qpid.transport.Connection] FLUSH: [conn:53e6978d]
IoReceiver - localhost/127.0.0.1:15672 2012-01-13 16:15:27,030 DEBUG [apache.qpid.transport.Connection] RECV: [conn:78dc9766] ch=0 ConnectionCloseOk()
IoReceiver - localhost/127.0.0.1:15672 2012-01-13 16:15:27,031 DEBUG [apache.qpid.transport.Connection] connection closed: conn:78dc9766
XX test close done
XX getting managed connections
BROKER: IoReceiver - /127.0.0.1:41093 2012-01-13 16:15:27,032 DEBUG [qpid.server.transport.ServerConnection] unregister mbean
BROKER: IoReceiver - /127.0.0.1:41093 2012-01-13 16:15:27,032 DEBUG [apache.qpid.transport.Connection] connection closed: conn:53e6978d
XX test got managed connections
{code}
> ManagedConnectionMBeanTest.testChannels fails on 0-10 spawned profiles
> ----------------------------------------------------------------------
>
> Key: QPID-3756
> URL: https://issues.apache.org/jira/browse/QPID-3756
> Project: Qpid
> Issue Type: Bug
> Components: Java Tests
> Affects Versions: 0.15
> Reporter: Keith Wall
> Assignee: Keith Wall
> Priority: Minor
>
> We see the following test fail occasionally on the java-mms-spawn.0-10 and java-bdb-spawn.0-10. The stack trace is as folows:
> Error Message
> Unexpected number of connection mbeans expected:<0> but was:<1>
> {code}
> Stacktrace
> junit.framework.AssertionFailedError: Unexpected number of connection mbeans expected:<0> but was:<1>
> at org.apache.qpid.management.jmx.ManagedConnectionMBeanTest.testChannels(ManagedConnectionMBeanTest.java:125)
> at org.apache.qpid.test.utils.QpidBrokerTestCase.runBare(QpidBrokerTestCase.java:240)
> at org.apache.qpid.test.utils.QpidTestCase.run(QpidTestCase.java:135)
> {code}
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