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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2521) Remove custom checksum headers from data transfer protocol
Date Tue, 01 Nov 2011 00:19:33 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13140718#comment-13140718

Hadoop QA commented on HDFS-2521:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 6 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    -1 core tests.  The patch failed these unit tests:

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/1508//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/1508//console

This message is automatically generated.
> Remove custom checksum headers from data transfer protocol
> ----------------------------------------------------------
>                 Key: HDFS-2521
>                 URL: https://issues.apache.org/jira/browse/HDFS-2521
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node, hdfs client
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2521-on-2512.txt, hdfs-2521.txt
> Most of the data transfer protocol has been converted over to protobufs, but we still
send the checksum header with ad-hoc serialization in a few places. This is self-inconsistent
and also makes wire protocol compatibility more difficult. This JIRA does the following:
> - introduce a new protobuf message to describe a checksum
> - include the "requested checksum" with the block operation (instead of coming separately
after it)
> - include the "required checksum" with the block operation response, for write operations
(instead of coming first in the BlockSender stream)

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