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  1. Hadoop Map/Reduce
  2. MAPREDUCE-3077

re-enable faulty TaskTracker storage without restarting TT, when appropriate

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • 0.20.205.0
    • None
    • tasktracker
    • None

    Description

      In MAPREDUCE-2928, Ravi Gummadi proposed:

      we can add LocalStorage.checkBadLocalDirs() call to TT.initialize() that can do disk-health-check of bad local dirs and add dirs to the good local dirs list if they become good.

      and Eli Collins added:

      Sounds good. Since transient disk failures may cause a file system to become read-only (causing permanent failures) sometimes re-mounting is sufficient to recover in which case it makes sense to re-enable faulty disks w/o TT restart.

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          is related to

          Sub-task - The sub-task of the issue MAPREDUCE-2928 MR-2413 improvements

          • Major - Major loss of function.
          • Closed

          Sub-task - The sub-task of the issue MAPREDUCE-3011 TT should remove bad local dirs from conf to prevent constant disk checking

          • Major - Major loss of function.
          • Closed

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              Unassigned Unassigned
              mattf Matthew Foley
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              Dates

                Created:
                Updated: