hadoop-common-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ryan rawson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6167) bin/hadoop script doesn't allow for different memory settings for each daemon type
Date Thu, 23 Jul 2009 18:40:14 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12734692#action_12734692
] 

ryan rawson commented on HADOOP-6167:
-------------------------------------

I'm not sure this is true, my datanode processes are running like so:

/usr/java/jdk1.6.0_14/bin/java -Xmx1000m -Dcom.sun.management.jmxremote -Xmx2000m -XX:+DoEscapeAnalysis
(all the other arguments)

in hadoop-env.sh i have:
export HADOOP_DATANODE_OPTS="-Xmx2000m -XX:+DoEscapeAnalysis ...."


how does this not work?

> bin/hadoop script doesn't allow for different memory settings for each daemon type
> ----------------------------------------------------------------------------------
>
>                 Key: HADOOP-6167
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6167
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Fernando
>         Attachments: hadoop
>
>
> bin/hadoop assumes that all daemon types ( namenode, datanode, jobtracker, tasktracker
), all use the same memory settings.. (HADOOP_HEAPSIZE).
> I propose changes to that script to allow overriding the default memory ( HADOOP_HEAPSIZE
), with daemon specific OPTS (HADOOP_NAMENODE_OPTS, etc ).
> Basically at the bottom of the bin/hadoop script, it will check to see if the user has
already set "-Xmx" in the HADOOP_OPTS variable.. if so, then it will ignore the JAVA_HEAP_SIZE
variable..
> as such:
> # run it
> if [[ $HADOOP_OPTS == *-Xmx* ]]; then
>   exec "$JAVA" $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"
> else
>   exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"
> fi
> I will attach the file as I have modified it..

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message