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https://issues.apache.org/jira/browse/QPID-3047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12992521#comment-12992521
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Rajith Attapattu commented on QPID-3047:
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In AMQSession_0_10.java, when using AUTO_ACK or DUPS_OK the acknowledgements
are batched to improve performance.
The ack are flushed based one of the following conditions (which ever happens
first).
1. When the ack timer fires. The ack-time is configure via
qpid.session.max_ack_delay
2. if un_acked_msg_count > max_prefetch/2.
For the test case you could force it to ack more frequently by having a smaller
prefetch.
(Please note as per the JMS spec AUTO_ACK should ack each message before it
serves up the next message. However by default our AUTO_ACK acts the same as
DUPS_OK.)
> The QueueDepthWithSelectorTest fails on 0-10 profiles
> -----------------------------------------------------
>
> Key: QPID-3047
> URL: https://issues.apache.org/jira/browse/QPID-3047
> Project: Qpid
> Issue Type: Bug
> Components: Java Client
> Affects Versions: 0.9
> Reporter: Andrew Kennedy
> Assignee: Andrew Kennedy
> Fix For: 0.9
>
>
> The QueueDepthWithSelector needs refactored to use QpidBrokerTestCase rather
> than being hardcoded simply the 0-8 iVM broker. Once this is done, the test
> fails on 0-10 profiles, as the session is not flushing acks correctly.
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