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From Yehia Elshater <y.z.elsha...@gmail.com>
Subject Re: Adding extra commands to MR AM
Date Thu, 13 Nov 2014 15:45:51 GMT
Yes Arun, that is what I need. Thanks a lot.

Yehia

On 13 November 2014 08:55, Arun Murthy <acm@hortonworks.com> wrote:

> 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.elshater@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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