Ryan Hochstetler [http://community.jboss.org/people/ryanhos] created the 
discussion

"Re: Messages Stuck in 'Delivering State'."

To view the discussion, visit: http://community.jboss.org/message/590685#590685

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Gurvinderpal,

We're experiencing the "stuck in delivering" issue also, though on a clustered 
setup.  It occurs on queues consumed by MDBs and by JBoss ESB.  We don't yet 
have a solution, but I'm closing-in on one.  I'm wodering if it isn't a 
remoting timeout issue when the server is under high load (we're doing load 
testing) or during a stop-the-world GC.  This poster has had success increasing 
the remoting timeouts:   http://community.jboss.org/message/442276#442276 
http://community.jboss.org/message/442276#442276

The next time you notice this, check the consumer count on the queue.  Is it 
the expected value, or is it zero?  (I believe MDB-consumed queues should 
always have one consumer.)  What about the +delivering count?+  Does it match 
the number of stuck messages?  What happens if you stop and start the MDB 
consuming that queue via the jmx-console?  The +delivering+ messages will 
disappear, but do the messages actually get consumed?  (have they perhaps 
already been consumed?  Can you prove this via the logs?)  The more evidence 
and information we gather about this, the closer we get to a solution.  
However, most of JBoss' attention has been turned toward HornetQ (according to 
my limited powers of observation).  Even if you find the exact source of the 
problem, a solution may not arrive quickly or at all, unless you've paid-up 
your JBoss credits.
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