[Gridmix] Gridmix should give better error message when input-data directory
already exists and -generate option is given
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Key: MAPREDUCE-3829
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3829
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: contrib/gridmix
Reporter: Ravi Gummadi
Assignee: Ravi Gummadi
Instead of throwing exception messages on to the console, Gridmix should give
better error message when input-data directory already exists and -generate
option is given.
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