-Re: Mechanism of hadoop -jar
Harsh J 2012-08-12, 02:02
On Sun, Aug 12, 2012 at 3:39 AM, Jay Vyas <[EMAIL PROTECTED]> wrote:
> Hi guys: I'm trying to find documentation on how "hadoop jar" actually
> works i.e. how it copies/runs the jar file across the cluster, in order to
> debug a jar issue.
> 1) Where can I get a good explanation of how the hadoop commands (i.e.
> -jar) are implemented ?
The "jar" sub-command executes the org.apache.hadoop.util.RunJar class.
> 2) Specifically, Im trying to access a bundled text file from a jar :
> from inside a mapreduce job.... Is it okay to do this ? Or does a classes
> ability to aquire local resources change in the mapper/reducer JVMs ?
I believe this should work.