topic Parallel task completion issue in Alfresco Archive

Parallel task completion issue

mpradny — Thu, 02 May 2013 10:11:32 GMT

Hi, I recently ran into a issue where two users completed one task at same time. Process after this task is rather complex, including parallel gateways and call activities, where some data are updated in external system, so it runs for 20-30 seconds. Problem is that when two users completed this ta

Re: Parallel task completion issue

jbarrez — Mon, 06 May 2013 08:57:12 GMT

Hmm your assumption is correct: one should get the optimistic locking exception, the other should just execute.

20-30 secs does sound long for keeping one transaction open. Especially oracle (at least in the past) is known for not coping with that well. So maybe it's an oracle configuration setting? Unless it's a bug, Activiti should execute the way you describe.

Re: Parallel task completion issue

touseefrafique — Tue, 27 Aug 2013 07:48:47 GMT

you can set task assignee before completing the task and always check if task assignee is not null before completing the task

* assuming you are not maintaining task assignee. if not you need to change taskAssignee to some other value with which you can determine that the task is under processing.