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https://issues.apache.org/jira/browse/HADOOP-13898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15746274#comment-15746274
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Ravi Prakash commented on HADOOP-13898:
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Looks good to me. +1. Committing to branch-2 shortly.
> should set HADOOP_JOB_HISTORYSERVER_HEAPSIZE only if it's empty on branch2
> --------------------------------------------------------------------------
>
> Key: HADOOP-13898
> URL: https://issues.apache.org/jira/browse/HADOOP-13898
> Project: Hadoop Common
> Issue Type: Bug
> Components: scripts
> Affects Versions: 2.9.0
> Reporter: Fei Hui
> Assignee: Fei Hui
> Attachments: HADOOP-13898-branch-2.001.patch,
> HADOOP-13898-branch-2.002.patch
>
>
> In mapred-env, set HADOOP_JOB_HISTORYSERVER_HEAPSIZE 1000 by default, That is
> incorrect.
> We should set it 1000 by default only if it's empty.
> Because if you run 'HADOOP_JOB_HISTORYSERVER_HEAPSIZE =512
> $HADOOP_HOME/sbin/mr-jobhistory-daemon.sh start historyserver',
> HADOOP_JOB_HISTORYSERVER_HEAPSIZE will be set 1000, rather than 512.
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