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From "Koji Noguchi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1371) One bad node can incorrectly flag many files as corrupt
Date Fri, 03 Sep 2010 16:12:33 GMT
One bad node can incorrectly flag many files as corrupt
-------------------------------------------------------

                 Key: HDFS-1371
                 URL: https://issues.apache.org/jira/browse/HDFS-1371
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs client, name-node
    Affects Versions: 0.20.1
         Environment: yahoo internal version 
[knoguchi@gwgd4003 ~]$ hadoop version
Hadoop 0.20.104.3.1007030707

            Reporter: Koji Noguchi


On our cluster, 12 files were reported as corrupt by fsck even though the replicas on the
datanodes were healthy.
Turns out that all the replicas (12 files x 3 replicas per file) were reported corrupt from
one node.

Surprisingly, these files were still readable/accessible from dfsclient (-get/-cat) without
any problems.



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