Activiti JVM recycled due to MQ listener stopped.

[thnagi]

We received alerts twice so for. We are running Activiti in WebSphere 7.0. We communicate between our core application and Activiti using MQ. The MQ listener stopped twice in the last few days.

Here is what we observed in the log.

[7/9/14 8:47:46:491 EDT] 0000004b ThreadMonitor W WSVR0605W: Thread "WorkManager.DefaultWorkManager : 171" (0000010b) has been active for 686019 milliseconds and may be hung. There is/are 9 thread(s) in total in the server that may be hung.
[7/9/14 8:47:46:493 EDT] 0000004b ThreadMonitor W WSVR0605W: Thread "WorkManager.DefaultWorkManager : 179" (00000113) has been active for 675725 milliseconds and may be hung. There is/are 10 thread(s) in total in the server that may be hung.

We are unable to find the root cause. In both case we recylced the Activiti JVM to bring the application back. Any idea what is causing this issue.

[jbarrez]

The threads that are hanging here, are those MQ threads or Activiti threads?

In the case of Activiti threads: are you using the default job executor? That one starts threads itselfs.