Hello all,
We are using JBoss Messaging 1.0.1.SP4 with JBoss Remoting 2.2.0 in JBoss
4.0.5.GA. We have a series of MDB's which answer to queues. The queues are
deployed on a remote machine from the JBoss instance hosting the MDB's.
We have already noticed that sometimes when shutting down JBoss, the server
hangs on undeployment of MDB's.
Today we were investigating the fact that certain queues were populated with
messages that were not being delivered to their target MDB's. Using the JMX
console, we noticed that the number of messages in MessageCount was not the
same as that from querying the database directly for these queues. Sometimes it
was more; sometimes it was less. When we tried to undeploy one of the MDB's
affected, we saw the following stracktrace:
2007-03-26 13:48:00,227 WARN [org.jboss.tm.TransactionImpl] Transaction
TransactionImpl:XidImpl[FormatId=257, GlobalId=Franco/39484616, BranchQual=,
localId=39484616] timed out. status=STATUS_COMMITING
2007-03-26 13:48:11,364 WARN [org.jboss.jms.client.JBossConnectionConsumer]
Connection consumer closing due to error in listening thread
JBossConnectionConsumer[-2147480495, 44]
javax.jms.JMSException: Failed to get a server session: javax.jms.JMSException:
Cannot get session after pool has been closed down.
at
org.jboss.jms.asf.StdServerSessionPool.getServerSession(StdServerSessionPool.java:206)
at
org.jboss.jms.client.JBossConnectionConsumer.run(JBossConnectionConsumer.java:291)
at java.lang.Thread.run(Thread.java:595)
After this, we cannot undeploy anything, even applications that have nothing to
do with MDB's. The only way to terminate the server is to send it a kill -9,
which is very bad.
Looking in the JBoss code, it seems that the server session pool is empty and
is never refilled. When we perform the undeployment, my guess is a notify() is
sent to this thread. Seeing that the pool is closing, it throws the
JMSException "cannot get session after pool has been closed".
The question I have is, why isn't the session pool being refilled and why does
this hang the undeployment thread?
Many thanks,
Adam
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