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Upgrade to 5.15 Randomly duplicate Task in same process instance

juanvi

I've upgraded activiti engine from 5.12 to 5.15.
After completing a user task form, the engine randomly creates two instances of the same task when it should be one task. There is only one flow between the user task form and the problematic service task. I used standard configuration .

What am i doing wrong?

Thank you.

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Comments

martin_grofcik

Can you create jUnit test for the described case please?
http://forums.activiti.org/content/sticky-how-write-unit-test

Regards
Martin

juanvi

This error only happens in our production environment , the business process is large and the task is located almost at the end of the bp.
is there another way to check throw logs… , tomcat in debug mode, database data?

Thank you , very much.
Regards!

martin_grofcik

Is the part of the process instance executed asynchronously?

Regards
Martin

juanvi

Yes , before duplicate task there is a receive task which is fired by signal sended throw rest service.

martin_grofcik

When service call is not able to be rolled back in transaction job executor can execute it several times…..
Is it the case?
Regards
Martin

juanvi

Problem solved . I realize that i was sending the same signal rest call twice at the same time , so activiti engine takes two calls and creates two tasks, i think activiti doesn't complete receive task when the same signal arrives and also gets processed.

Thank you , very much
Regards !!!!!

slavomir

Hi I've got probably the same problem. You solved the root cause problem but how did you get rid of the already duplicated tasks? (I cannot complete because of duplication and delete because they are part of the corrupted processes)

Regards

Slavomir