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https://issues.apache.org/jira/browse/TEZ-1259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16094063#comment-16094063
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Siddharth Seth commented on TEZ-1259:
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[~hitesh] - is this case handled currently in recovery?
>From the RecoveryParser - it seems like the latest Init / Started event will
>be remembered. However, the old Finished event is not forgotten if the vertex
>is restarted after completion. However I don't see that used. Does the
>recovery for a Vertex rely on all the tasks completing?
If the recovery relies on all the tasks completing, I don't think this jira
will cause problems - as long as recovery is dealing with task failures
correctly.
> Vertex should move to RUNNING state without generating an extra VERTEX_START
> event
> ----------------------------------------------------------------------------------
>
> Key: TEZ-1259
> URL: https://issues.apache.org/jira/browse/TEZ-1259
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Siddharth Seth
> Attachments: TEZ-1259.001.patch
>
>
> Currently, we end up generating a VERTEX_START event targeted at the same
> vertex when a vertex is ready to start. Instead, the Vertex can directly move
> to started state - which prevents unnecessary event queueing.
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