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From Chen-hsiu Huang <chenh...@gmail.com>
Subject ActiveMQ 5.3 pending message issue
Date Tue, 11 Aug 2009 07:47:30 GMT

Hi, 

We're using ActiveMQ 5.3 as our message service. However, we found that
messages stall easily through our test. 

1. We have two servers, each with two Intel Xeon E5420 CPUs, total 8 cores,
32 GB memory for each. Both servers run on Linux CentOS 5.3. 
2. JDK 1.6.0_13 is used
3. The two servers use static network connector to form a cluster.
4. 50 consumers listen to 50 channels on Server1, and 50 producers send
messages to those consumers on the said 50 channels via Server2. (one
consumer/producer means a standalone java process)
5. 50 producers connect and send messages to Server2 simultaneously. Each
producer sends 20,000 messages. 
6. If all 50 consumers receives 20,000 messages for each (total 1,000,000
messages), then we say “the round” is completed. 
7. However, not every round finishes successfully. Messages get pending or
stalled easily. 
8. We have both Java and C++ client implemented, both have the same problem. 

We design this test scenario in order to simulate our production
environment. But actually we get stalled messages frequently when we test
our applications. 

Does anyone have any clue to this issue? 
How should I configurate our server to provide stable services? 

Thanks in advance. 

PS: attached with one of our server configuration file. 

BR, 
Chen-hsiu Huang
http://www.nabble.com/file/p24913211/activemq_01.xml activemq_01.xml 
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