MicAnn wrote:
>
> Parameters :
> Version : apache-activemq-5.2.0 on windows or AIX (unix)
> JDK 1.5.0
> Test with exclude queue (no remote consumer)
> In the policyEntry queue, producerFlowControl is false.
>
> Conditions:
> I put 40000 little messages (or more) without active consumer by session
> of 10000 messages
> I lunch listener and sometimes I get more than 40000 messages (up to 19
> duplicates messages)
>
> ActiveMQ log display this message during the get operations
> INFO HashIndex - Resize hash bins
> queue-data_queue#3a#2f#2fLOCAL.Q3 from 1024 to 4096
>
> When MessageID are recorded it's possible to see the double MessageID of
> duplicate messages - marqued "duplicate" for the first and xxxxxx for the
> duplicate.
>
> rs37:/home/aep262ta/test_activemq> grep -n duplicate MessageID.txt
> 27209: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7209
> duplicate
> 27210: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7210
> duplicate
> 27211: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7211
> duplicate
> 27212: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7212
> duplicate
> 27213: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7213
> duplicate
> 27214: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7214
> duplicate
> 27246: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7246
> duplicate
> 27247: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7247
> duplicate
> 27248: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7248
> duplicate
> 27249: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7249
> duplicate
> 27250: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7250
> duplicate
> rs37:/home/aep262ta/test_activemq> grep -n xxxxx MessageID.txt
> 28424: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7209
> xxxxxxxxxxx
> 28425: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7210
> xxxxxxxxxxx
> 28426: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7211
> xxxxxxxxxxx
> 28427: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7212
> xxxxxxxxxxx
> 28428: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7213
> xxxxxxxxxxx
> 28429: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7214
> xxxxxxxxxxx
> 28430: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7246
> xxxxxxxxxxx
> 28431: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7247
> xxxxxxxxxxx
> 28432: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7248
> xxxxxxxxxxx
> 28433: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7249
> xxxxxxxxxxx
> 28434: JMS MessageID : ID:rs37-36072-1244118256815-0:0:1:1:7250
> xxxxxxxxxxx
>
> Here, messages read the first time in 27209 pos. are provided a second
> time in 28424 pos.
>
> Issue is reproducible on Windows or unix system (AIX).
>
> The JMX console shows that the QueueSize attribute has negative value (see
> the image) http://www.nabble.com/file/p23872984/duplicate.jpeg and
> Dequeue count is bigger than EnqueueCount
>
> Other condition:
> With a non exclude queue, I can't reproduce the issue.
> and the resized HashIndex is different
> INFO HashIndex - Resize hash bins queue-data_queue#3a#2f#2fM1
> from 1024 to 2048
> INFO HashIndex - Resize hash bins queue-data_queue#3a#2f#2fM1
> from 2048 to 4096
>
> This issue is serious : duplicate message or lost message is grave.
>
>
---------------
Gary Tully said : Can you try your test scenario with the 5.3 snapshot, I
think it should
behave better. There was an issue with the queue cache, i think this related
to https://issues.apache.org/activemq/browse/AMQ-2020
----------------
OK, this issue seems resolved with apache-activemq-5.3-SNAPSHOT. I can't
reproduce it after five tests with the same conditions.
Thanks
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