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Posted to hdfs-dev@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2013/10/20 10:36:42 UTC

[jira] [Created] (HDFS-5394) fix race conditions in DN caching and uncaching

Colin Patrick McCabe created HDFS-5394:
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             Summary: fix race conditions in DN caching and uncaching
                 Key: HDFS-5394
                 URL: https://issues.apache.org/jira/browse/HDFS-5394
             Project: Hadoop HDFS
          Issue Type: Sub-task
    Affects Versions: HDFS-4949
            Reporter: Colin Patrick McCabe
            Assignee: Colin Patrick McCabe


The DN needs to handle situations where it is asked to cache the same replica more than once.  (Currently, it can actually do two mmaps and mlocks.)  It also needs to handle the situation where caching a replica is cancelled before said caching completes.



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