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From "Venkat Ranganathan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5217) DistCp fails when launched by Oozie in a secure cluster
Date Tue, 07 May 2013 14:11:18 GMT
Venkat Ranganathan created MAPREDUCE-5217:
---------------------------------------------

             Summary: DistCp fails when launched by Oozie in a secure cluster
                 Key: MAPREDUCE-5217
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5217
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: distcp
    Affects Versions: 1.1.2
         Environment: Hadoop secure cluster
            Reporter: Venkat Ranganathan
            Assignee: Venkat Ranganathan
         Attachments: MAPREDUCE-5217.patch

As mentioned in MAPREDUCE-4324, Oozie has the following boilerplate code in
in the main launcher for Pig, Hive, MR and Sqoop actions.

if (System.getenv("HADOOP_TOKEN_FILE_LOCATION") != null) {
            jobConf.set("mapreduce.job.credentials.binary", System.getenv("HADOOP_TOKEN_FILE_LOCATION"));
}

For Java action, which does not have a main launcher in oozie, the above codecan be added
by the user as the user purportedly has the code that is launched.

But for DistCp action, the user has no such luxury.  The solution attempted in
MAPREDUCE-4324 would have helped DistCp, but it was not implemented as it would break MAPREDUCE-3727.
 So, we have to fix DistCp and
add the same boilerplate code so that DistCp action can be launched by Oozie
in a secure cluster.

The code added checks for an System env. variable to be set which is not
typically set in normal command line execution of DistCp,  DistCp runs fine
with commnad  line usage both in secure and non-secure cluster.

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