topic Re: Null result from taskService.createTaskQuery().processInstanceId().singleResult() in a script task in Alfresco Archive

Null result from taskService.createTaskQuery().processInstanceId().singleResult() in a script task

maudrid — Fri, 30 Sep 2016 11:06:29 GMT

I'm having a problem with taskService.createTaskQuery().processInstanceId().singleResult() when executed in a script task.I have tried the same code in a unit test and it works correctly. To me it looks like the query is not selecting data in the same session.Like data that is not yet committed is n

Re: Null result from taskService.createTaskQuery().processInstanceId().singleResult() in a script task

maudrid — Fri, 30 Sep 2016 11:23:33 GMT

In case there is confusion about why the log says 'SCMBulkUpload.js', it should say 'myTestLog'. I renamed it when preparing this post but did not run it again to get new log output.

Also I forgot to mention that I am using Activiti 6 beta 2

Re: Null result from taskService.createTaskQuery().processInstanceId().singleResult() in a script task

maudrid — Wed, 12 Oct 2016 13:38:00 GMT

*bump*

Anyone?

Re: Null result from taskService.createTaskQuery().processInstanceId().singleResult() in a script task

maudrid — Wed, 23 Nov 2016 14:11:19 GMT

Still nothing?

Re: Null result from taskService.createTaskQuery().processInstanceId().singleResult() in a script task

ghamer — Fri, 13 Jul 2018 15:04:05 GMT

I also had this issue.

The issue here is that you are creating user tasks in a SubProcess but quering for tasks using the processInstanceId of the parent process.

To fix this, first find the sub-process instance where the Tasks were created:

ProcessInstance subProcessInstance = runtimeService.createProcessInstanceQuery().superProcessInstanceId( theSCMProcess.getInstanceId() ).singleResult();

then perform the Task search using the id of the sub-process.

Task task1 = taskService.createTaskQuery().processInstanceId( subProcessInstance.getInstanceId() ).singleResult();