You mean to the JVM of the MRAppMaster?
<property>
<name>yarn.app.mapreduce.am.command-opts</name>
<value>-Xmx1024m</value>
<description>Java opts for the MR App Master processes.
The following symbol, if present, will be interpolated: @taskid@ is
replaced
by current TaskID. Any other occurrences of '@' will go unchanged.
For example, to enable verbose gc logging to a file named for the taskid
in
/tmp and to set the heap maximum to be a gigabyte, pass a 'value' of:
-Xmx1024m -verbose:gc -Xloggc:/tmp/@taskid@.gc
Usage of -Djava.library.path can cause programs to no longer function if
hadoop native libraries are used. These values should instead be set as
part
of LD_LIBRARY_PATH in the map / reduce JVM env using the
mapreduce.map.env and
mapreduce.reduce.env config settings.
</description>
</property>
<property>
<name>yarn.app.mapreduce.am.env</name>
<value></value>
<description>User added environment variables for the MR App Master
processes. Example :
1) A=foo This will set the env variable A to foo
2) B=$B:c This is inherit tasktracker's B env variable.
</description>
</property>
Arun
On Wed, Nov 12, 2014 at 6:06 PM, Yehia Elshater <y.z.elsha...@gmail.com>
wrote:
> Hi All,
>
> Is there a way to add extra commands to be run while launching an instance
> of MRApplicaitonMaster instance ?
>
> Thanks
> Yehia
>
--
--
Arun C. Murthy
Hortonworks Inc.
http://hortonworks.com/
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