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From "John Sichi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2535) split hostname format should be consistent with tasktracker for locality
Date Wed, 12 May 2010 03:13:42 GMT
split hostname format should be consistent with tasktracker for locality
------------------------------------------------------------------------

                 Key: HBASE-2535
                 URL: https://issues.apache.org/jira/browse/HBASE-2535
             Project: Hadoop HBase
          Issue Type: Improvement
          Components: mapred, mapreduce
    Affects Versions: 0.20.4
            Reporter: John Sichi


I was running a mapreduce job (via Hive) against HBase, and noticed that I wasn't getting
any locality (the input split location and the task tracker machine in the job tracker UI
were always different, and "Rack-local map tasks" in the job counters was 0).

I tracked this down to a discrepancy in the way hostnames were being compared.

The task tracker detail had a Host like

/f/s/1.2.3.4/h.s.f.com.

(with trailing dot)

But the Input Split Location had

/f/s/1.2.3.4/h.s.f.com

(without trailing dot)


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