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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1001) DataXceiver and BlockReader disagree on when to send/recv CHECKSUM_OK
Date Tue, 02 Mar 2010 07:35:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12840051#action_12840051
] 

Hadoop QA commented on HDFS-1001:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org
  against trunk revision 916902.

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

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 patch.  The patch command could not apply the patch.

Console output: http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h5.grid.sp2.yahoo.net/257/console

This message is automatically generated.

> DataXceiver and BlockReader disagree on when to send/recv CHECKSUM_OK
> ---------------------------------------------------------------------
>
>                 Key: HDFS-1001
>                 URL: https://issues.apache.org/jira/browse/HDFS-1001
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.22.0
>            Reporter: bc Wong
>
> Running the TestPread with additional debug statements reveals that the BlockReader sends
CHECKSUM_OK when the DataXceiver doesn't expect it. Currently it doesn't matter since DataXceiver
closes the connection after each op, and CHECKSUM_OK is the last thing on the wire. But if
we want to cache connections, they need to agree on the exchange of CHECKSUM_OK.

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