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https://issues.apache.org/jira/browse/TEZ-2426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533406#comment-14533406
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Siddharth Seth commented on TEZ-2426:
-------------------------------------
Longer term - 0.8, may be worthwhile to rework some of this, along with
protocol changes.
> Task input not complete before sending Task completed event
> -----------------------------------------------------------
>
> Key: TEZ-2426
> URL: https://issues.apache.org/jira/browse/TEZ-2426
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Bikas Saha
> Priority: Critical
> Attachments: am.log, container.log
>
>
> Sequence of events
> 1) Task A starts in a container
> 2) Task A complete event comes to AM
> 3) Task B starts in the same container
> 4) Task A's input calls some method on its context. Crashes with NPE
> 5) The crash sends an input failed event for Task A to the AM
> 6) Task A state machine crashes saying cannot handle failed after success
> In some cases, it could be that status update event is also sent after
> completion, though not sure if its related to the failed event being sent.
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