Gridmix can emit better error messages instead of throwing Exceptions
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Key: MAPREDUCE-2006
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2006
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: contrib/gridmix
Reporter: Ravi Gummadi
Gridmix throws Exceptions (including those that come from mapreduce jobs) when
there are some issues like
(1) ioPath already exists and -generate option is given
(2) when -generate option is given, ioPath (a) doesn't exist (b) exists but
with wrong permissions
(3) gridmix.output.directory path already exists
(4) gridmix.min.file.size is > the size specified as option to -generate
etc.
These can be validated early and provide proper error messages to the user of
gridmix.
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