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https://issues.apache.org/jira/browse/TEZ-3203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Lowe updated TEZ-3203:
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Attachment: TEZ-3203.001.patch
Patch to have the shuffle vertex manager go ahead and schedule zero tasks (and
therefore finish configuring the vertex for any downstream vertices waiting on
that) when there are no tasks to schedule.
> DAG hangs when one of the upstream vertices has zero tasks
> ----------------------------------------------------------
>
> Key: TEZ-3203
> URL: https://issues.apache.org/jira/browse/TEZ-3203
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.7.0
> Reporter: Jason Lowe
> Priority: Critical
> Attachments: TEZ-3203.001.patch
>
>
> A DAG hangs during execution if it has a vertex with multiple inputs and one
> of those upstream vertices has zero tasks and is using ShuffleVertexManager.
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