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https://issues.apache.org/jira/browse/QPID-3459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13099673#comment-13099673
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Andrew Kennedy commented on QPID-3459:
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Agree with Robbie here.
FYI, when implementing, I deliberated between full-on synchronisation and using
atomic counters, eventually settling for the synchronisation as seen. In
testing there was no performance difference between the two mechanisms at any
statistically significant level. Adding more synchronisation would cause
serialisation of message processing, since the statistics generation happens on
the delivery path, which is inadvisable.
> Test org.apache.qpid.management.jmx.MessageStatisticsDeliveryTest
> sporadically fails on 0.10 profiles
> -----------------------------------------------------------------------------------------------------
>
> Key: QPID-3459
> URL: https://issues.apache.org/jira/browse/QPID-3459
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: 0.6, 0.7, 0.8, 0.9, 0.10, 0.11, 0.12
> Reporter: Alex Rudyy
> Assignee: Alex Rudyy
> Priority: Minor
> Attachments: QPID-3459-Adds-synchronization-to-StatisticsCounter.patch
>
>
> The stack trace from failed test is provided below:
> Message 3 was not received
> junit.framework.AssertionFailedError: Message 3 was not received
> at
> org.apache.qpid.management.jmx.MessageStatisticsDeliveryTest.receiveUsing(MessageStatisticsDeliveryTest.java:107)
> at
> org.apache.qpid.management.jmx.MessageStatisticsDeliveryTest.testDeliveryAndReceiptStatistics(MessageStatisticsDeliveryTest.java:72)
> at
> org.apache.qpid.test.utils.QpidBrokerTestCase.runBare(QpidBrokerTestCase.java:243)
> at org.apache.qpid.test.utils.QpidTestCase.run(QpidTestCase.java:125)
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