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.
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