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Posted to mapreduce-dev@hadoop.apache.org by "Robert Joseph Evans (JIRA)" <ji...@apache.org> on 2011/07/07 15:54:17 UTC

[jira] [Created] (MAPREDUCE-2652) MR-279: Cannot run multiple NMs on a single node

MR-279: Cannot run multiple NMs on a single node 
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                 Key: MAPREDUCE-2652
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2652
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mrv2
    Affects Versions: 0.23.0
            Reporter: Robert Joseph Evans
            Assignee: Robert Joseph Evans


Currently in MR-279 the Auxiliary services, like ShuffleHandler, have no way to communicate information back to the applications.  Because of this the Map Reduce Application Master has hardcoded in a port of 8080 for shuffle.  This prevents the configuration "mapreduce.shuffle.port" form ever being set to anything but 8080.  The code should be updated to allow this information to be returned to the application master.  Also the data needs to be persisted to the task log so that on restart the data is not lost.

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