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https://issues.apache.org/jira/browse/HADOOP-6985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924693#action_12924693
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Doug Cutting commented on HADOOP-6985:
--------------------------------------

This looks reasonable to me.  It's arguably not back-compatible, since settings 
of HADOOP_OPTS would previously be ignored.  Does that concern anyone?  If not, 
I'll commit this.

> Suggest that HADOOP_OPTS be preserved in hadoop-env.sh.template
> ---------------------------------------------------------------
>
>                 Key: HADOOP-6985
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6985
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Ramkumar Vadali
>            Priority: Minor
>         Attachments: HADOOP-6985.patch
>
>
> For an administrator who wants to customize HADOOP_OPTS, it would be better 
> to have
> # if [ "$HADOOP_OPTS" == "" ]; then export HADOOP_OPTS=-server; else FOO+=" 
> -server"; fi
> instead of
> # Extra Java runtime options.  Empty by default.
> # export HADOOP_OPTS=-server

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