Dev S [https://community.jboss.org/people/devinderpal] created the discussion "Intermittently pending human task come across a missing jbpm parent process in jBPM 5.2" To view the discussion, visit: https://community.jboss.org/message/752342#752342 -------------------------------------------------------------- Env: Jboss 7.1.0, mysql DB, Redhat 5.5, jBPM 5.2 When I thought I'm getting pretty good with jBPM and our application is about to be released, i came across this tough bug during extensive testing. Intermittently we're facing that pending human task has missing parent process instance and it results in nullpointerexception while completing that human task. I ran below SQL query to confirm this: select t.id, t.processInstanceId from Task t where t.processInstanceId not in (select distinct(InstanceId) from ProcessInstanceInfo); +----+-------------------+ | id | processInstanceId | +----+-------------------+ | 33 |                20 | | 43 |                20 | | 47 |                20 | | 53 |                20 | | 57 |                20 | +----+-------------------+ Same code works fine most of the time. So I think it's not problem with our code but some bug in jBPM. MinaTaskServer is being used for our implementation. Also we use JTA persistence for jBPM core engine and RESOURCE_LOCAL for human task. We have to use RESOURCE_LOCAL for human task because JTA can't be used due to another jBPM bug. If I reinitialize the database, then everything works fine for a while but again I run into this problem. Please let us know how we can fix it, if anyone knows solution. I was about to create a blocker JIRA issue but thought let's first get community opinion on this. Exception stack trace is attached. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/752342#752342] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]