[jboss-user] [jBPM] - Re: Concurrency problems with JBPM 5.4

Thomas Setiabudi do-not-reply at jboss.com
Tue Jul 23 02:53:57 EDT 2013

Thomas Setiabudi [https://community.jboss.org/people/thomas.setiabudi] created the discussion

"Re: Concurrency problems with JBPM 5.4"

To view the discussion, visit: https://community.jboss.org/message/829220#829220

Hi Jon Kranes,

I got this problem too before.
I am using JBPM5.4 Final, Spring 3, and MS SQL Server 2008 Db.

few things that I remember:
1. when you start process or when you do completeTask, remove the @Transactional annotation. And let the jBPM engine handle the transaction. 
(I got a problem where my Web App got hang like endless locking, and this clears the issue)

2. add unique index for "processInstanceId" field in database table "ProcessInstanceLog"
(I got a problem where the jBPM engine throws deadlock exception when starting task without human task with multiple thread)

Hope this helps.

Thomas Setiabudi

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