topic Re: Receive Task inside a Sub Process in Alfresco Forum

Receive Task inside a Sub Process

tahadakal — Mon, 27 Feb 2017 14:37:57 GMT

I have a BPM which has a receive task inside a sub process.When I try to signal the process instance execution after creation i get the following error :java.lang.NullPointerException at org.activiti.engine.impl.persistence.entity.ExecutionEntity.signal(ExecutionEntity.java:406) at org.activit

Re: Receive Task inside a Sub Process

gdharley — Mon, 27 Feb 2017 16:38:42 GMT

How are you "signalling" the Receive Task?

Please provide a unit test demonstrating what you are seeing.

Greg

‌

Re: Receive Task inside a Sub Process

tahadakal — Mon, 27 Feb 2017 17:03:08 GMT

Thanks for the prompt reply.

The Junit is updated at the end of question.

Re: Receive Task inside a Sub Process

gdharley — Mon, 27 Feb 2017 17:35:26 GMT

Ok, so the devil is always in the detail.

You are signalling the process instance ID which in this case is not likely to be the same as the execution ID, hence the NPE.

You will need to retrieve the execution ID by querying the engine for the receive task, then use that ID rather than the process instance id.

Cheers,

Greg

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Re: Receive Task inside a Sub Process

tahadakal — Tue, 28 Feb 2017 13:33:18 GMT

Thanks a lot Greg!! It works fine now.

For the reference of others, this is the order of usage.

/activiti-rest/service/runtime/process-instances?businessKey=0642
/activiti-rest/service/query/executions [take the parent ID from step 1result]
{
"parentId" : "97122075"
}
/activiti-rest/service/runtime/executions/97122088 [take the execution ID from step 2 result]
{
"action":"signal"
}