Messages get stuck temporarily

[jydev <jy...@gmail.com>]

Hi,

We have messages that get submitted to the queue daily.  Every so often,
these messages get stuck in the queue until another message arrives the next
day.  It almost seems like the second message "pushes" out the first...  

Any idea why?  Is there some configuration property that's causing this?  I
don't know how to diagnose this issue and didn't find similar issues on the
forum.  There isn't anything in activemq log file that suggests any issue.

Our Environment:
* ActiveMQ 5.1 : single, no failover
* Tomcat 6.0 : 2 nodes
* Spring (Using DefaultMessageListener)
* Virtual topic with multiple consumers (some consumers receive the message)
* Each of Tomcat has same sets of consumers

VirtualTopic.myTopic
Node 1 with listeners
  Consumer.A.VirtualTopic.myTopic
  Consumer.B.VirtualTopic.myTopic
  Consumer.C.VirtualTopic.myTopic

Node 2 with listeners
  Consumer.A.VirtualTopic.myTopic
  Consumer.B.VirtualTopic.myTopic
  Consumer.C.VirtualTopic.myTopic

Appreciate any diagnostic suggestions!

Thanks,
JY

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