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https://issues.apache.org/jira/browse/TEZ-1120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13999072#comment-13999072
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Bikas Saha commented on TEZ-1120:
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When attempt completes then it sends completion event to task and also to its
vertex. The task then sends event to the vertex too that the task has
completed. The vertex gets 2 back-to-back events. Attempt completion and task
completion. While it works fine, the vertex unnecessarily gets duplicate
information. On the attempt completion it notifies downstream vertices and on
task completion it checks whether it has completed all tasks. This logic seems
convoluted.
> Vertex should notify destinations about task completion and not attempt
> completion
> ----------------------------------------------------------------------------------
>
> Key: TEZ-1120
> URL: https://issues.apache.org/jira/browse/TEZ-1120
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Bikas Saha
>
> This is unnecessarily crossing the vertex, task, attempt hierarchy.
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