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https://issues.apache.org/jira/browse/MAPREDUCE-7369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17450668#comment-17450668
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Prabhu Joseph commented on MAPREDUCE-7369:
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bq. Have you thought about also parallelising the close so that and the
different outputs can be closed simultaneously?
That will improve the speed. Have reported
[MapReduce-7370|https://issues.apache.org/jira/browse/MAPREDUCE-7370] to handle
the same. Thanks.
> MapReduce tasks timing out when spends more time on MultipleOutputs#close
> -------------------------------------------------------------------------
>
> Key: MAPREDUCE-7369
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7369
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 3.3.1
> Reporter: Prabhu Joseph
> Assignee: Prabhu Joseph
> Priority: Major
>
> MapReduce tasks timing out when spends more time on MultipleOutputs#close.
> MultipleOutputs#closes takes more time when there are multiple files to be
> closed & there is a high latency in closing a stream.
> {code}
> 2021-11-01 02:45:08,312 INFO [AsyncDispatcher event handler]
> org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl: Diagnostics
> report from attempt_1634949471086_61268_m_001115_0:
> AttemptID:attempt_1634949471086_61268_m_001115_0 Timed out after 300 secs
> {code}
> MapReduce task timeout can be increased but it is tough to set the right
> timeout value. The timeout can be disabled with 0 but that might lead to
> hanging tasks not getting killed.
> The tasks are sending the ping every 3 seconds which are not honored by
> ApplicationMaster. It expects the status information which won't be send
> during MultipleOutputs#close. This jira is to add a config which considers
> the ping from task as part of Task Liveliness Check in the ApplicationMaster.
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