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https://issues.apache.org/jira/browse/HADOOP-7098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13001612#comment-13001612
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Bernd Fondermann commented on HADOOP-7098:
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I did test this manually indeed. The patch is in active use in my env.

There are things like http://code.google.com/p/jbash/ which might help setting 
up a test, but just for this small improvement it seem like overkill.  

> tasktracker property not set in conf/hadoop-env.sh
> --------------------------------------------------
>
>                 Key: HADOOP-7098
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7098
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: conf
>    Affects Versions: 0.20.2, 0.21.1, 0.22.0
>            Reporter: Bernd Fondermann
>            Assignee: Bernd Fondermann
>         Attachments: hadoop-7098.patch
>
>
> For all cluster components, except TaskTracker the OPTS environment variable 
> is set like this in hadoop-env.sh:
> export HADOOP_<COMPONENT>_OPTS="-Dcom.sun.management.jmxremote 
> $HADOOP_<COMPONENT>_OPTS"
> The provided patch fixes this.

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