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https://issues.apache.org/jira/browse/TEZ-3213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15260183#comment-15260183
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Jeff Zhang commented on TEZ-3213:
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It is not necessary to do that in master. There's no RECOVERING state in master
> Uncaught exception during vertex recovery leads to invalid state transition
> loop
> --------------------------------------------------------------------------------
>
> Key: TEZ-3213
> URL: https://issues.apache.org/jira/browse/TEZ-3213
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.7.0
> Reporter: Jason Lowe
> Assignee: Eric Badger
> Attachments: TEZ-3213-b0.7.001.patch
>
>
> If an uncaught exception occurs during a state transition from the RECOVERING
> vertex then V_INTERNAL_ERROR will be delivered to the state machine, but that
> event is not handled in the RECOVERING state. That in turn causes a
> V_INTERNAL_ERROR event to be delivered to the state machine, and it loops
> logging the invalid transitions.
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