Error while submit form data

[glorfindeil]

Hello everyone!
Can anybody help me? Googling is not helped.

I sent to form/form-data next payload:

<javascript>
{"taskId":"50016","properties":[{"id":"documentReviewedLocal","name":"documentReviewedLocal","type":"boolean","value":true,"readable":true,"writable":true,"required":false,"enumValues":[]},{"id":"comment","name":"comment","type":"string","readable":true,"writable":true,"required":false,"enumValues":[]}]}
</javascript>

I'm trying to submit new values of form variables. Than i get error.

org.activiti.engine.ActivitiOptimisticLockingException: ProcessInstance[50008] was updated by another transaction concurrently
   at org.activiti.engine.impl.db.DbSqlSession.flushUpdates(DbSqlSession.java:875) ~[activiti-engine-5.19.0.2.jar:5.19.0.2]
   at org.activiti.engine.impl.db.DbSqlSession.flush(DbSqlSession.java:614) ~[activiti-engine-5.19.0.2.jar:5.19.0.2]
   at org.activiti.engine.impl.interceptor.CommandContext.flushSessions(CommandContext.java:212) ~[activiti-engine-5.19.0.2.jar:5.19.0.2]
   at org.activiti.engine.impl.interceptor.CommandContext.close(CommandContext.java:138) ~[activiti-engine-5.19.0.2.jar:5.19.0.2]
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Variables are recieved by GET method to the same service, User task is

 <userTask id="usertask1" name="Check document" activiti:assignee="admin">
      <extensionElements>
        <activiti:formProperty id="documentReviewedLocal" name="documentReviewedLocal" type="boolean" variable="documentReviewed" default="false"></activiti:formProperty>
        <activiti:formProperty id="comment" name="comment" type="string" variable="comment"></activiti:formProperty>
      </extensionElements>
    </userTask>
‍‍‍‍‍‍‍‍

What is wrong in my implementation? Thanks.

[martin_grofcik]

Hi glorfindeil,

jUnit test would help a lot.
https://forums.activiti.org/content/sticky-how-write-unit-test
Can you create one?

Regards
Martin

[glorfindeil]

Hi Martin!

I can not reproduce this bug in Junit case, that meas I have mistake in my software. I think this is somehing like doubly asynhronyous call to same service from JavaScript, or etc.
Thanks for the help!