topic NullPointerException on Complete Task in Alfresco Archive

NullPointerException on Complete Task

edufrazao — Fri, 15 Jul 2016 14:32:33 GMT

Hi folks.Sometimes in a specific bpmn process, the task complete throws this error:Caused by: java.lang.NullPointerException at org.activiti.engine.impl.variable.JPAEntityListVariableType.isAbleToStore(JPAEntityListVariableType.java:60) at org.activiti.engine.impl.variable.DefaultVaria

Re: NullPointerException on Complete Task

vasile_dirla — Mon, 18 Jul 2016 08:55:51 GMT

Hi,
For debugging you could add a breakpoint in JPAEntityListVariableType.java at line 60. (as you can see in the stacktrace)
Yes you should be able to set variables to null. (in my opinion there is an unexpected situation which leads to this NPE)
You can add some extra NPE checking in JPAEntityListVariableType.java, and create a PR with the changes.

Re: NullPointerException on Complete Task

edufrazao — Mon, 18 Jul 2016 11:10:22 GMT

Vasile, this problem occours sometimes. Always in the same process, but not with any instance. When I got it again, I will debug with this scenario, and try to build a patch. Thank you by your help.