[jira] [Created] (AMQ-6634) Restarting Consumer results in duplicate message delivery for all messages consumed after restart.

["Jayaram Sankaranarayanan (JIRA)" <ji...@apache.org>]

Jayaram Sankaranarayanan created AMQ-6634:
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             Summary: Restarting Consumer results in duplicate message delivery for all messages consumed after restart.
                 Key: AMQ-6634
                 URL: https://issues.apache.org/jira/browse/AMQ-6634
             Project: ActiveMQ
          Issue Type: Bug
          Components: JMS client
    Affects Versions: 5.7.0
         Environment: Linux
            Reporter: Jayaram Sankaranarayanan


This is observed during our tests where a consumer is restarted , after which we see that consumer receives all the messages sent post restart twice. 

Here is the test environment. 

Active MQ 5.7.0
One Topic, with two active consumers  and one producer.
There are three JVM instances.
1. Runs the broker, 
2. Runs the producer and consumer#1
3. Runs the consumer#2

When instance#3 is restarted, that consumer will start receiving duplicate messages for all the messages that producer sends (instance#2).  
Note that consumer running in instance #2 (which was not restarted) does not receive duplicate messages. 

The duplicate message delivery is not just for those messages that producer sends when consumer#2 was being restarted. It is observed for all the messages that producer sends after consumer#2 is back online as well.

Can you please confirm whether this is a known issue with activeMQ 5.7 ?

I tried to search the issues in JIRA but could not see a matching one.






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