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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-877) Client-driven checksum verification not functioning
Date Thu, 07 Jan 2010 01:20:54 GMT
Client-driven checksum verification not functioning
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                 Key: HDFS-877
                 URL: https://issues.apache.org/jira/browse/HDFS-877
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 0.20.1, 0.21.0, 0.22.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon


This is actually the reason for HDFS-734 (TestDatanodeBlockScanner timing out). The issue
is that DFSInputStream relies on readChunk being called one last time at the end of the file
in order to receive the lastPacketInBlock=true packet from the DN. However, DFSInputStream.read
checks pos < getFileLength() before issuing the read. Thus gotEOS never shifts to true
and checksumOk() is never called.

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