[jira] Commented: (HADOOP-2551) hadoop-env.sh needs finer granularity

["Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-2551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595992#action_12595992 ] 

Vinod Kumar Vavilapalli commented on HADOOP-2551:
-------------------------------------------------

What happened with the idea of doing away with HADOOP_HEAPSIZE completely? The patch doesn't have any fix for this. Track this on another JIRA?

Currently, if I specify both HADOOP_HEAPSIZE=500 and HADOOP_JOBTRACKER_OPTS=-Xmx1024m, both get passed to jobtracker (JT command line: "java -Xmx500m -Xmx1024m .......") and the runtime picks up the last value. So, it works for now, but it would have been cleaner had HADOOP_HEAPSIZE been kicked of in entirety.

> hadoop-env.sh needs finer granularity
> -------------------------------------
>
>                 Key: HADOOP-2551
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2551
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: scripts
>            Reporter: Allen Wittenauer
>            Assignee: Raghu Angadi
>            Priority: Blocker
>             Fix For: 0.17.0
>
>         Attachments: HADOOP-2551.patch
>
>
> We often configure our HADOOP_OPTS on the name node to have JMX running so that we can do JVM monitoring.  But doing so means that we need to edit this file if we want to run other hadoop commands, such as fsck.  It would be useful if hadoop-env.sh was refactored a bit so that there were different and/or cascading HADOOP_OPTS dependent upon which process/task was being performed.  

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