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https://issues.apache.org/jira/browse/OOZIE-2436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15137945#comment-15137945
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Purshotam Shah commented on OOZIE-2436:
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OOZIE-2129 was adding "oozie.action.yarn.tag" to job context. We have optimized
fork job submission to do parallel Hadoop job submission.
Fork job submission needs to acquire wf action lock, not workflow job lock.
OOZIE-2129 was modifying workflow instance for workflow action. This was
causing race condition because Workflow instance was shared among multiple
parallel wf actions.
> Fork/join workflow fails with "oozie.action.yarn.tag must not be null"
> ----------------------------------------------------------------------
>
> Key: OOZIE-2436
> URL: https://issues.apache.org/jira/browse/OOZIE-2436
> Project: Oozie
> Issue Type: Bug
> Reporter: Purshotam Shah
>
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