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https://issues.apache.org/jira/browse/MAPREDUCE-7242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Mollitor updated MAPREDUCE-7242:
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Attachment: MAPREDUCE-7242.2.patch
> Do Not Initialize Empty ArrayList in LocalContainerAllocator
> ------------------------------------------------------------
>
> Key: MAPREDUCE-7242
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7242
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: client
> Affects Versions: 3.2.0
> Reporter: David Mollitor
> Assignee: David Mollitor
> Priority: Trivial
> Attachments: MAPREDUCE-7242.1.patch, MAPREDUCE-7242.2.patch
>
>
> https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/local/LocalContainerAllocator.java#L107-L110
> Just pass static empty collections and save the initialization.
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