Process execution gets stuck

[waghvikrant]

I have a process A which contains two call activities B and C. Call activitiy C contains a Human task. When I include process A in another process Z as a reusable sub process and start the process Z. After starting process Z, process execution normally goes to process A, it calls call activities B and C as expected. But after this execution is getting stuck and execution of process Z never resumes. Process instance tab of KIE workbench shows that process instances of A, B and C are completed, Process instance Z is in Active state forever. There are no exceptions. Execution of processes is just getting stuck.  When I replace on of the call activities with a script task, everything works fine. When I run the JUnits everything works fine. This problem is coming only when I invoke a process from KIE workbench. What can be the problem and its solution?

JIRA for the issue https://issues.jboss.org/browse/JBPM-4409

[waghvikrant]

Is there any workaround or possible solution for this issue?

[badtea]

You mentioned that there were no exceptions.  Did you look in the server.log on the JBPM server?

I have noticed that sometimes there are no exceptions in server.log when I have problems.  By default, the logging is set to INFO.  Sometimes I would increase the root logging to DEBUG, reproduce the problem, and then I would get exceptions logged as DEBUG.  (You cannot see these when the logging is set to INFO).  Then I could set the root logging back to INFO, because it is a flood of information.  And then I could use the exception text to troubleshoot the problem.

You can see how to increase the logging on this thread:

Re: How to increase logging level for jBPM components

HTH

[waghvikrant]

I increased logging levels to DEBUG and ran the process again...

Got some exceptions i the server.log

I am attaching the server.log

[badtea]

From those exceptions, it looks like there is some kind of database error.  I'm not sure how to resolve it.  Maybe a jbpm guru has some ideas.

By the way, I just noticed that jbpm version 6.1.0.Final was released yesterday.  If possible, you could install 6.1.0 and try your processes in there.  I'm going to try 6.1.0 later this week, to see if it fixes some issues I've been having.

http://sourceforge.net/projects/jbpm/files/jBPM%206/jbpm-6.1.0.Final/