[jira] [Created] (MAPREDUCE-6565) Configuration to use host name in delegation token service is not read from job.xml during MapReduce job execution.

["Chris Nauroth (JIRA)" <ji...@apache.org>]

Chris Nauroth created MAPREDUCE-6565:
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             Summary: Configuration to use host name in delegation token service is not read from job.xml during MapReduce job execution.
                 Key: MAPREDUCE-6565
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6565
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Chris Nauroth


By default, the service field of a delegation token is populated based on server IP address.  Setting {{hadoop.security.token.service.use_ip}} to {{false}} changes this behavior to use host name instead of IP address.  However, this configuration property is not read from job.xml.  Instead, it's read from a separate {{Configuration}} instance created during static initialization of {{SecurityUtil}}.  This does not work correctly with MapReduce jobs if the framework is distributed by setting {{mapreduce.application.framework.path}} and the {{mapreduce.application.classpath}} is isolated to avoid reading core-site.xml from the cluster nodes.  MapReduce tasks will fail to authenticate to HDFS, because they'll try to find a delegation token based on the NameNode IP address, even though at job submission time the tokens were generated using the host name.



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