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Date: Wed, 27 Jan 2010 06:00:40 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-877) Client-driven block verification not
 functioning
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    [ https://issues.apache.org/jira/browse/HDFS-877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12805372#action_12805372 ] 

Hudson commented on HDFS-877:
-----------------------------

Integrated in Hdfs-Patch-h5.grid.sp2.yahoo.net #208 (See [http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/208/])
    

> Client-driven block verification not functioning
> ------------------------------------------------
>
>                 Key: HDFS-877
>                 URL: https://issues.apache.org/jira/browse/HDFS-877
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client, test
>    Affects Versions: 0.20.1, 0.21.0, 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.22.0
>
>         Attachments: hdfs-877-branch20.txt, hdfs-877.txt, hdfs-877.txt, hdfs-877.txt, hdfs-877.txt, hdfs-877.txt, hdfs-877.txt
>
>
> 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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