Hi Arindam,
hadoop jar jarFileName MainClassName
The above command will not submit the job. This command only executes the jar
file using the Main Class(Main-class present in manifest info if available
otherwise class name(i.e MainClassName in the above command) passed as an
argument. If we give any additional arguments in the command, those will be
passed to the Main class args.
We can have a job submission code in the Main Class or any of the classes in
the jar file. You can take a look into WordCount example for job submission
info.
Thanks
Devaraj
________________________________________
From: Arindam Choudhury [[email protected]]
Sent: Wednesday, April 25, 2012 2:14 PM
To: common-user
Subject: understanding hadoop job submission
Hi,
I am new to hadoop and I am trying to understand hadoop job submission.
We submit the job using:
hadoop jar some.jar name input output
this in turn invoke the RunJar . But in RunJar I can not find any
JobSubmit() or any call to JobClient.
Then, how the job gets submitted to the JobTracker?
-Arindam
