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https://issues.apache.org/jira/browse/TEZ-3831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16165375#comment-16165375
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Kuhu Shukla edited comment on TEZ-3831 at 9/13/17 10:16 PM:
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Thank you [~jeagles] for reporting this and the patch.
+1 . LGTM.
was (Author: kshukla):
+1 . binding. LGTM.
> Reduce Unordered memory needed for storing empty completed events
> -----------------------------------------------------------------
>
> Key: TEZ-3831
> URL: https://issues.apache.org/jira/browse/TEZ-3831
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Jonathan Eagles
> Assignee: Jonathan Eagles
> Attachments: Screen Shot 2017-09-13 at 4.55.11 PM.png,
> TEZ-3831.001.patch
>
>
> the completedInputs blocking queue is used to store inputs for the
> UnorderedKVReader to consume. With Auto-reduce parallelism enabled and nearly
> all empty inputs, the reader can't prune the empty events from the blocking
> queue fast enough to keep up. In my scenario, an OOM occurred.
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