I have a message-driven EJB which is listening to a queue which can only have a single
listener (the queue can only be dequeued by one listener) so when I have one node
running in a cluster a second node can't start due to this restriction (at least this
is what appears to be going on). I am running both nodes using an Oracle AQ JMS
Provider patch, and I have the Message-Driven EJB using a singleton configuration
(this setup works fine in a non-clustered setting).
Below is the start of the exception messages I get on the second node after running
the first node on another machine (with no errors):
17:27:47,983 ERROR [DLQHandler] Initialization failed DLQHandler
javax.jms.JMSException: Error creating the dlq connection: DLQ not bound
at org.jboss.ejb.plugins.jms.DLQHandler.createService(DLQHandler.java:171)
at
org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:237)
at org.jboss.system.ServiceMBeanSupport.create(ServiceMBeanSupport.java:164)
The nodes can see each other, as seen by the following messages:
17:27:38,499 INFO [DefaultPartition] Number of cluster members: 2
17:27:38,499 INFO [DefaultPartition] Other members: 1
17:27:38,499 INFO [DefaultPartition] Fetching state (will wait for 60000
milliseconds):
17:27:39,210 INFO [HANamingService] Listening on /0.0.0.0:1100
17:27:39,220 INFO [DetachedHANamingService$AutomaticDiscovery] Listening on
/0.0.0.0:1102
, group=230.0.0.4, HA-JNDI address=10.10.10.78:1100
What can I do to make it so that the MDB is only started once, so that only the first
node's MDB listens to the queue ?
My systems are running Windows XP and JBoss 3.2.5, the JMS Provider is an Oracle
Advanced Queue (using the patch provided for the JBoss/OAQ JMS Provider from
sourceforge.net).
Thanks in advance for any suggestions.
-James
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