streaming.jar -file packaging forgets timestamps
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Key: MAPREDUCE-3584
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3584
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.20.2
Reporter: Dieter Plaetinck
When invoking "hadoop jar
/usr/local/hadoop/contrib/streaming/hadoop-0.20.2-streaming.jar -file <files>",
hadoop will package the files <files>, but it will forget about their
timestamps.
After the files are unpacked in
<tmp_dir>/mapred/local/taskTracker/jobcache/job_$job/jars, all files will have
the timestamps of when the files were unpacked.
The problem is that this way meaningful information is lost.
For example in my case i ship some files along with my job, and I need to
compare the age (mtime) of 2 files and rebuild one of them if it's too old,
but because of this hadoop behavior, my logic breaks.
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