MR-279: Log info about the location of dist cache
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Key: MAPREDUCE-2758
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2758
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Affects Versions: 0.23.0
Reporter: Ramya Sunil
Priority: Minor
Fix For: 0.23.0
Currently, there is no log info available about the actual location of the
file/archive in dist cache being used by the task except for the "ln" command
in task.sh. We need to log this information to help in debugging esp in those
cases where there are more than one archive with the same name.
In 0.20.x, in task logs, one could find log info such as the following:
INFO org.apache.hadoop.mapred.TaskRunner: Creating symlink: <distcache
location>/archive <- <mapred.local.dir>/archive
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