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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1459) FileSystem.getFileCacheHints returns IP addresses rather than hostnames, which breaks 'data-locality' in map-reduce
Date Mon, 04 Jun 2007 10:09:35 GMT
FileSystem.getFileCacheHints returns IP addresses rather than hostnames, which breaks 'data-locality'
in map-reduce
-------------------------------------------------------------------------------------------------------------------

                 Key: HADOOP-1459
                 URL: https://issues.apache.org/jira/browse/HADOOP-1459
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.14.0
            Reporter: Arun C Murthy
            Priority: Critical
             Fix For: 0.14.0


FileSystem.getFileCacheHints via DFSClient.getHints (post HADOOP-894?) returns IP address
of the datanodes instead of the hostnames which breaks mapping from task-tracker to datanodes
in map-reduce i.e. the system cannot intelligently place maps on datanodes where blocks are
present.

I have verified that this affects trunk only, branch-0.13.0 seems ok.

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