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From "Matt Foley (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-3077) re-enable faulty TaskTracker storage without restarting TT, when appropriate
Date Fri, 23 Sep 2011 01:19:26 GMT
re-enable faulty TaskTracker storage without restarting TT, when appropriate
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                 Key: MAPREDUCE-3077
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3077
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: tasktracker
    Affects Versions: 0.20.205.0
            Reporter: Matt Foley


In MAPREDUCE-2928, Ravi Gummadi proposed:
bq. 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:
bq. 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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