[ openjms-Bugs-768543 ] Deadlock btw LeaseManager and DestinationManager.collectGarb

Bugs item #768543, was opened at 2003-07-10 01:41
Message generated for change (Settings changed) made by tanderson
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Category: server
Group: v0.7.5
Status: Open
Resolution: None
Priority: 5
Submitted By: David Magro Martin (dmagrom)
>Assigned to: Tim Anderson (tanderson)
Summary: Deadlock btw LeaseManager and DestinationManager.collectGarb

Initial Comment:
We think we have discovered a deadlock problem....

We have 5 clients connected to our openjms server. At
the moment we are not using any MessagerListeners in
the consumer threads, but rather doing continous
polling (receiveNoWait) with a 5ms interval.

Since we have no listeners and do no receive, there are
intervals with no consumer threads attached to the
corresponding destination cache. So, every second
(default setting) the cache gets garbaged-collected,
but at the same time there are expired messages in the
cache and the
lease manager tries to remove them. This produces 
a deadlock as can be seen in the stack trace (attached
file).

All our messages are persistent (mysql backend) and 
some of them have a TTL.

Thank you very much.

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