MDB stops servicing any messages (ReceiversCount goes to 0)

[ravichittari]

Environment
Jboss 4.2.2
OS RHEL 4.0
JDK 5.0

Question:
I have very simple MDB implementation where I log some data into db asyncrhonously. This implementation works fine except sometimes, it runs to a situation where-in ReceiversCount on the Queue goes to 0 and QueueDepth increases.

(a) When would the RecieversCount go to zero? ie. the only one receiver associated with this queue is empty or null

(b) When I look into the logs I see
javax.resource.ResourceException: Interrupted while requesting permit! Waited 0 ms
logged in server.log

This seems like the thread is already in interrupted state or being interrupted when a simple getConnection() request is made.

Below is stack trace
2008-09-14 15:57:51,180 ERROR [org.jboss.resource.adapter.jms.JmsSessionFactoryImpl] could not create session
javax.resource.ResourceException: Interrupted while requesting permit! Waited 0 ms
at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:309)
at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:500)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:341)
at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:315)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:396)
at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:842)
at org.jboss.resource.adapter.jms.JmsSessionFactoryImpl.allocateConnection(JmsSessionFactoryImpl.java:389)
at org.jboss.resource.adapter.jms.JmsSessionFactoryImpl.createSession(JmsSessionFactoryImpl.java:369)



So, the final question, is are (a) and (b) related? if so, what is the solution?
I think I gave all info but could add more.

Any help is greatly appreciated.

[ravichittari]

Jboss Tech Team:

Anyone who can provide some pointers here?

Thanks!!

[genman]

What's causing the InterruptException in your software? The issue might be related.

[ravichittari]

Application code in particular is NOT calling an interrupt..

But I have a Web application (Servlet) that is deployed on the same instance. I do call interrupt on some of the threads servicing web requests when the processing time goes beyond 2.5 min.

But, my understanding is that, the threads alloted for web app are not shared across for the JMS Session Bean pool. The JMS listener problem would be associated with the threads alloted to only JMS pool

(a) Is my understanding of the thread pooling is incorrect?

Otherwise, I am not calling a direct interrupt on any of the JMS session threads..

[adrian.brock]

The error shown has nothing to do with MDBs.

The only reason the receivers count will go to zero is because
all the MDBs are busy doing something.

A thread dump will show what they are doing.

I assume the subscription count is non-zero. That is the MDB hasn't been undeployed.