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From "Brandon Li (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4212) NameNode can't differentiate between a never-created block and a block which is really missing
Date Tue, 20 Nov 2012 07:24:58 GMT
Brandon Li created HDFS-4212:
--------------------------------

             Summary: NameNode can't differentiate between a never-created block and a block
which is really missing
                 Key: HDFS-4212
                 URL: https://issues.apache.org/jira/browse/HDFS-4212
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 1.2.0, 3.0.0
            Reporter: Brandon Li


In one test case, NameNode allocated a block and then was killed before the client got the
addBlock response. 

After NameNode restarted, the block which was never created was considered as a missing block
and FSCK would report the file is corrupted.

The problem seems to be that, NameNode can't differentiate between a never-created block and
a block which is really missing.   

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