HornetQ: some messages get stuck (JBoss 7.1.1 AS)

[petronom]

We're using JBoss 7.1 AS with HornetQ. Some JMS messages get stuck in In Delivery phase:

So some messages are stuck and not processed by MDB in onMessage() method (Java EE spec.). After JBoss restart JMS messages are processed correctly.

We assume that some MDB instance are corrupted or something like that because they are not returning to pool. Only restart fix them:

Any idea why some MDB instances are not returning to pool and probably corrupted JMS messages?

Thanks.

[jbertram]

Do you have a thread dump from the application server during the time you observe this issue?  That should indicate what the MDBs are doing (if anything).

[petronom]

I don't have thread dump. I observe server via jconsole. I'll try obtain thread dump.

[petronom]

Sorry for late response. Thread dump helped us find the issue!

We found out that multiple threads (MDB pool instances) ended up in deadlock in one of ours business logic methods.

For thread dump we used jstack.

Thank you.