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https://issues.apache.org/jira/browse/TEZ-1647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14164887#comment-14164887
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Vikram Dixit K commented on TEZ-1647:
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Yes. It is the custom vertex manager.
> Issue with caching of events in VertexManager::onRootVertexInitialized
> -----------------------------------------------------------------------
>
> Key: TEZ-1647
> URL: https://issues.apache.org/jira/browse/TEZ-1647
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Hitesh Shah
> Assignee: Jeff Zhang
>
> Came across a use-case in Hive where the current functionality does not work.
> Consider a vertex with 2 inputs ( i1, i2 ):
> The custom vertex manager in Hive generates events only when both i1 and i2
> are initialized.
> Therefore vertexManagerPlugin::onRootInitialized(i1) does nothing but for
> vertexManagerPLugin::onRootIniitialized(i2) , it calls context.addEvents(i1)
> and context.addEvents(i2). When this happens, the events generated for i1
> never get sent to the VertexImpl to be routed to the tasks.
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