AEM workflow "Go-to" step executes twice in AEM 6.5 SP 12 | Community
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girishb83316758
Level 3
August 21, 2022
Solved

AEM workflow "Go-to" step executes twice in AEM 6.5 SP 12

  • August 21, 2022
  • 3 replies
  • 1754 views

Hi All,

 

we have a custom workflow in which the Go-TO step gets executed twice. which should not be happening. And this has started appearing after we upgraded our AEM 5.6.10 to AEM6.5.12.

 

We are seeing the below errors in the logs-

org.apache.jackrabbit.oak.plugins.commit.conflictvalidator commit failed due to unresolved conflicts in va4/workflow/instacnes/server1/workflow_22/data/metadata = {addExistingProperty = {cq:waitingToAdvance = {true,false}}}

 

 

org.apache.jackrabbit.oak.api.commitFailedException: oakstate0001: unresolved conflicts in va/workflow/instacnes/server1/workflow_22/data/metadata

 

job handler: [va4/workflow/instacnes/server1/update_asset/:/content/dam/event-store/workflow-list.json/jcr:content/renditions/original] org.apache.jackrabbit.oak.plugins.commit.conflictvalidator commit failed due to unresolved conflicts in /content/dam/event-store/workflow-list.json/jcr:content = {changeChangedProperty= {dam:assetState= {processed,unprocessed}}}

 

org.apache.jackrabbit.oak.api.commitFailedException: oakstate0001: unresolved conflicts in /content/dam/event-store/workflow-list.json/jcr:content

 

Could anyone let us know how this can be avoided.

 

 

Thanks

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Best answer by joerghoh

This message could originate from a race condition where 2 concurrent threads are trying to modify a node.

 

Please raise a ticket with Adobe support, if this behavior appeared with Sp12.

3 replies

G
girishb83316758Author
Level 3
August 22, 2022

@joerghoh @kautuk_sahni  Any directions here..?

joerghoh
Adobe Employee
joerghohAdobe EmployeeAccepted solution
Adobe Employee
August 22, 2022

This message could originate from a race condition where 2 concurrent threads are trying to modify a node.

 

Please raise a ticket with Adobe support, if this behavior appeared with Sp12.

    G
    girishb83316758Author
    Level 3
    August 23, 2022

    How should we resolve this concurrent threads/session issue?

     Are there any reference links? How to find which sessions are running concurrently in aem?

    Is there any hot fix package to install? Any thing like that??

      joerghoh
      Adobe Employee
      joerghohAdobe Employee
      Adobe Employee
      August 24, 2022

      As mentioned, please contact Adobe support to check if this is a known issue (I would wonder, though).

       

      commit failed due to unresolved conflicts in /var/workflow/instances/server1/workflow_22/data/metadata

       

      This error happened because the metadata of this workflow steps are modify concurrently; that should not happen, as the a workflow is not executed twice in parallel. Can you please double-check the path (you probably did not a copy&paste), because it should contain the name of the workflow as well.

       

      unresolved conflicts in /content/dam/event-store/workflow-list.json/jcr:content

       

      This message comes from a conflict in the DAM. This could possibly be caused by parallel write operations; doing some guess work: Do you have a workflow model, which runs on distinct payloads, but in the end always updates this single JSON (file)? In this case it's very likely that this exception occurrs (you run this workflow  with 2 payloads and they try to write concurrently on this node/file).

       

      And of course there are many more chances to get concurrent modifications. Failing workflow steps are retried (IIRC 3 times), so a single instance of this failure would not result in a failing workflow).

      So please check if you see a pattern in the failing paths, and when it comes to workflows (guessing from the thread name and the name of the logger) if a retry helped.

      ManviSharma
      Adobe Employee
      ManviSharmaAdobe Employee
      Adobe Employee
      August 23, 2022

      Hi,

       

      The issue seems to be with your custom workflows. -->The error “: \org.apache.jackrabbit.oak.api.commitFailedException: oakstate0001: unresolved conflicts in va/workflow/instacnes/server1/workflow_22/data/metadata” is usually observed when there are a lot of instances running and they are stuck, the processing of workflows gets impacted. The reason for the workflow instances being stuck could be many like bulk activity or some overlap as shown in the error.

       

      Regards,

      Manvi Sharma

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