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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10759) Remove hardcoded JAVA_HEAP_MAX in hadoop-config.sh
Date Thu, 07 Aug 2014 15:04:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10759?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14089314#comment-14089314
] 

Allen Wittenauer commented on HADOOP-10759:
-------------------------------------------

After a bit more thinking about this idea, I have a proposal to make that I think will accomplish
the ultimate goal of this JIRA while also giving the users much more control than they have
now (a win-win):

# We introduce HADOOP_HEAPSIZE_MAX and HADOOP_HEAPSIZE_MIN, both default to empty.  They will
set the Xmx and Xms values, respectively.  Both require units to be provided, such that e.g.
HADOOP_HEAPSIZE_MAX="10g" is valid.
# We deprecate HADOOP_HEAPSIZE and JAVA_HEAP_MAX and completely remove them from the hadoop-env.sh,
etc. documentation.  The code should honor them if set (thereby providing backwards compatibility),
but the HADOOP_HEAPSIZE_xyz vars take precedence in case of a conflict.
# I'm willing to do this work as either part of HADOOP-9902 (which rewrites all of this code
anyway) or as part of the series of follow-on patches to that change, depending upon the review
for 9902.

Thoughts?

> Remove hardcoded JAVA_HEAP_MAX in hadoop-config.sh
> --------------------------------------------------
>
>                 Key: HADOOP-10759
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10759
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: bin
>    Affects Versions: 2.4.0
>         Environment: Linux64
>            Reporter: sam liu
>            Priority: Minor
>             Fix For: 2.6.0
>
>         Attachments: HADOOP-10759.patch, HADOOP-10759.patch
>
>
> In hadoop-common-project/hadoop-common/src/main/bin/hadoop-config.sh, there is a hard
code for Java parameter: 'JAVA_HEAP_MAX=-Xmx1000m'. It should be removed.



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