JobClient.runJob() should return exit status for a job.
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Key: HADOOP-111
URL: http://issues.apache.org/jira/browse/HADOOP-111
Project: Hadoop
Type: Bug
Reporter: Andrzej Bialecki
JobClient.runJob() doesn't return any values. Any information about the exit
status of a job is discarded (or appears only in logs).
It should be possible to return the exit status, so that JobClient users can
determine whether a job was successfully completed or not. This is also
important when using cmd-line tools in shell scripts - currently they don't
return any exit codes, because it's not possible to determine the outcome of a
job submitted through JobClient. As a consequence, it's difficult to automate
repetitive jobs using shells scripts.
It would be also nice to have an exit message in case of errors, for human
consumption.
I propose to implement one of the following:
* change the return type of this method from void to int
* or, better yet, to put the exit code and optional exit messages inside the
JobConf instance under pre-defined keys.
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