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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2525) Race between BlockPoolSliceScanner and append
Date Tue, 01 Nov 2011 04:48:32 GMT
Race between BlockPoolSliceScanner and append
---------------------------------------------

                 Key: HDFS-2525
                 URL: https://issues.apache.org/jira/browse/HDFS-2525
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: data-node
    Affects Versions: 0.23.0
            Reporter: Todd Lipcon
            Priority: Critical


I wrote a test which runs append() in a loop on a single file with a single replica, appending
0~100 bytes each time. If this races with the BlockPoolSliceScanner, I observe the BlockPoolSliceScanner
getting FNFE, then reporting the block as bad to the NN. This causes the writer thread to
loop forever on completeFile() since it doesn't see a valid replica.

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