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  1. Hadoop Common
  2. HADOOP-1459

FileSystem.getFileCacheHints returns IP addresses rather than hostnames, which breaks 'data-locality' in map-reduce

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Details

    • Bug
    • Status: Closed
    • Blocker
    • Resolution: Fixed
    • 0.14.0
    • 0.14.0
    • None
    • None

    Description

      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.

      Attachments

        1. getHintsIpAddress2.patch
          2 kB
          Dhruba Borthakur

        Issue Links

          blocks

          Improvement - An improvement or enhancement to an existing feature or task. HADOOP-1457 Counters for monitoring task assignments

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Activity

            People

              dhruba Dhruba Borthakur
              acmurthy Arun Murthy
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              Dates

                Created:
                Updated:
                Resolved: