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From "Sreekanth Ramakrishnan (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6249) Incorrect synchronization in DistributedCache causes TaskTrackers to freeze up during localization of Cache for tasks.
Date Thu, 10 Sep 2009 09:13:57 GMT
Incorrect synchronization in DistributedCache causes TaskTrackers to freeze up during localization
of Cache for tasks.
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                 Key: HADOOP-6249
                 URL: https://issues.apache.org/jira/browse/HADOOP-6249
             Project: Hadoop Common
          Issue Type: Bug
          Components: filecache
    Affects Versions: 0.20.0
            Reporter: Sreekanth Ramakrishnan


Currently {{org.apache.hadoop.filecache.DistributedCache.getLocalCache(URI, Configuration,
Path, FileStatus, boolean, long, Path, boolean)}} allows only one {{TaskRunner}} thread in
TT to localize {{DistributedCache}} across jobs. Current way of synchronization is across
baseDir this has to be changed to lock on the same baseDir.


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