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From "Fernando (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1687) bin/hbase script doesn't allow for different memory settings for each daemon type
Date Tue, 28 Jul 2009 00:40:14 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12735860#action_12735860
] 

Fernando commented on HBASE-1687:
---------------------------------


1) we still need support for OPTS for each daemon type.

2) we might not need the fancy JAVA_HEAP_SIZE handling, since it looks like java ignores duplicate
Xmx settings, and keeps the last one in the command line.. so it looks ok.. as long as the
default is put first in the command line.. (but changing the script does make it a little
cleaner..)


> bin/hbase script doesn't allow for different memory settings for each daemon type
> ---------------------------------------------------------------------------------
>
>                 Key: HBASE-1687
>                 URL: https://issues.apache.org/jira/browse/HBASE-1687
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: Fernando
>         Attachments: hbase, hbase-script.diff
>
>
> bin/hbase assumes that all daemon types ( master, regionserver ), all use the same memory
settings.. (HBASE_HEAPSIZE).
> 1) I propose adding daemon specific OPTS much like hadoop already has ( HBASE_MASTER_OPTS,
HBASE_REGIONSERVER_OPTS ).
> So in bin/hbase, we would merge in the daemon specific opts within the case statement
as such:
> elif [ "$COMMAND" = "master" ] ; then
>   CLASS='org.apache.hadoop.hbase.master.HMaster'
>   HBASE_OPTS="$HBASE_OPTS $HBASE_MASTER_OPTS"
> elif [ "$COMMAND" = "regionserver" ] ; then
>   CLASS='org.apache.hadoop.hbase.regionserver.HRegionServer'
>   HBASE_OPTS="$HBASE_OPTS $HBASE_REGIONSERVER_OPTS"
> the new environment variables can then be added to hbase-env.sh as empty:
> export HBASE_MASTER_OPTS=""
> export HBASE_REGIONSERVER=""
> ..etc
> 2) I propose changes to that script to allow overriding the default memory ( HBASE_HEAPSIZE
), with daemon specific OPTS (HBASE_MASTER_OPTS, etc ).
> Basically at the bottom of the bin/hbase script, it will check to see if the user has
already set "-Xmx" in the HBASE_OPTS variable.. if so, then it will ignore the JAVA_HEAP_SIZE
variable..
> as such:
> # run it
> if [[ $HBASE_OPTS == *-Xmx* ]]; then
>   exec "$JAVA" $HBASE_OPTS -classpath "$CLASSPATH" $CLASS "$@"
> else
>   exec "$JAVA" $JAVA_HEAP_MAX $HBASE_OPTS -classpath "$CLASSPATH" $CLASS "$@"
> fi
> I will attach the file as I have modified it..

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