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Posted to mapreduce-issues@hadoop.apache.org by "Frank Nguyen (JIRA)" <ji...@apache.org> on 2015/04/24 07:02:38 UTC

[jira] [Created] (MAPREDUCE-6338) MR AppMaster does not honor ephemeral port range

Frank Nguyen created MAPREDUCE-6338:
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             Summary: MR AppMaster does not honor ephemeral port range
                 Key: MAPREDUCE-6338
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6338
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mr-am, mrv2
    Affects Versions: 2.6.0
            Reporter: Frank Nguyen


The MR AppMaster should only use port ranges defined in the yarn.app.mapreduce.am.job.client.port-range property.  On initial startup of the MRAppMaster, it does use the port range defined in the property.  However, it also opens up a listener on a random ephemeral port.  This is not the Jetty listener.  It is another listener opened by the MRAppMaster via another thread and is recognized by the RM.  Other nodes will try to communicate to it via that random port.  With firewall settings on, the MR job will fail because the random port is not opened.

This is related to MAPREDUCE-4079



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