UserTasks are created twice times

Camunda 7 Topics Discussion & Questions
1

Hi,

a few days ago I have opened following topic where I have had problems getting the jobexecutor working.

After that is solved, I have the problem, if a UserTask is reached, for everyone two entries in ACT_RU_TASK will be created and so the task twice times exist.

ID_                                  |REV_ |EXECUTION_ID_                        |PROC_INST_ID_                        |PROC_DEF_ID_                                                  |CASE_EXECUTION_ID_ |CASE_INST_ID_ |CASE_DEF_ID_ |NAME_                |PARENT_TASK_ID_ |DESCRIPTION_ |TASK_DEF_KEY_            |OWNER_ |ASSIGNEE_ |DELEGATION_ |PRIORITY_ |CREATE_TIME_        |DUE_DATE_ |FOLLOW_UP_DATE_ |SUSPENSION_STATE_ |TENANT_ID_ |
-------------------------------------|-----|-------------------------------------|-------------------------------------|--------------------------------------------------------------|-------------------|--------------|-------------|---------------------|----------------|-------------|-------------------------|-------|----------|------------|----------|--------------------|----------|----------------|------------------|-----------|
8a11f99b-cb0c-11e8-8ac6-6a6d1698cb21 |1    |8a115d54-cb0c-11e8-8ac6-6a6d1698cb21 |89cb2d7d-cb0c-11e8-8ac6-6a6d1698cb21 |Process_X:2:4cd339c3-cb0b-11e8-8ac6-6a6d1698cb21 |                   |              |             |Beschreibung zu DoFirst |                |             |Task_DoFirst |       |          |            |50        |2018-10-08 17:12:15 |          |                |1                 |           |
8a1247c1-cb0c-11e8-8ac6-6a6d1698cb21 |1    |8a11ab75-cb0c-11e8-8ac6-6a6d1698cb21 |89cb2d7d-cb0c-11e8-8ac6-6a6d1698cb21 |Process_X:2:4cd339c3-cb0b-11e8-8ac6-6a6d1698cb21 |                   |              |             |Beschreibung zu DoFirst |                |             |Task_DoFirst |       |          |            |50        |2018-10-08 17:12:15 |          |                |1                 |           |
d62aae37-cb0b-11e8-8ac6-6a6d1698cb21 |1    |d62a3902-cb0b-11e8-8ac6-6a6d1698cb21 |d5a3cad7-cb0b-11e8-8ac6-6a6d1698cb21 |Process_X:2:4cd339c3-cb0b-11e8-8ac6-6a6d1698cb21 |                   |              |             |Beschreibung zu DoSecond |                |             |Task_DoSecond |       |          |            |50        |2018-10-08 17:07:13 |          |                |1                 |           |
d62afc5b-cb0b-11e8-8ac6-6a6d1698cb21 |1    |d62a6013-cb0b-11e8-8ac6-6a6d1698cb21 |d5a3cad7-cb0b-11e8-8ac6-6a6d1698cb21 |Process_X:2:4cd339c3-cb0b-11e8-8ac6-6a6d1698cb21 |                   |              |             |Beschreibung zu DoSecond |                |             |Task_DoSecond |       |          |            |50        |2018-10-08 17:07:13 |          |                |1                 |           |

I have actually no idea to find out, what the problem is. The Service Tasks were only one time executed. My underlying database is a MariaDB 10.2 with disabled “batch Processing” flag in a docker container. It is the same issue using MariaDB 10.0.

It would be nice, if someone has a tipp for me. Thanks! :slight_smile:

Update

  • Same issue using latest supported Postgresql 9.6
  • Also same issue, when no async flag (without job executor) is set
  • Beside my process I have deployed a simple process with one userTask. When an instance is started, only one UserTask instance exists. Hmm, that means, that something is wrong with my process. I think I will create a new one to verify that…
2

Can you upload your process model - so we can see what exactly is happening?

3

Hi Niall,

here is my process model:
bestelleingang-alt.bpmn (22.3 KB)

Note: I have disabled the execution flag.

Actually I am remodeling my process and the new one works fine.

If you will find the bug in my model, please post it here.

Thanks!

4

Is it the Rechnung verakten task that is run twice?

You have two sequence flows going into it - so it creates 2 tokens. Deleting the extra sequence flow will do the trick.

5

That Task I have not checked, because earlier usertasks are called twice. If sequence flow “Vorkasse” is passed, the Usertask “Geldeingang prüfen” is called twice, for instance.

6