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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2791) If block report races with closing of file, replica is incorrectly marked corrupt
Date Wed, 25 Jan 2012 23:06:42 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13193426#comment-13193426
] 

Hadoop QA commented on HDFS-2791:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12511906/hdfs-2791.txt
  against trunk revision .

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

    +1 tests included.  The patch appears to include 9 new or modified tests.

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

Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/1811//console

This message is automatically generated.
                
> If block report races with closing of file, replica is incorrectly marked corrupt
> ---------------------------------------------------------------------------------
>
>                 Key: HDFS-2791
>                 URL: https://issues.apache.org/jira/browse/HDFS-2791
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node, name-node
>    Affects Versions: 0.22.0, 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2791-test.txt, hdfs-2791.txt, hdfs-2791.txt, hdfs-2791.txt,
hdfs-2791.txt
>
>
> The following sequence of events results in a replica mistakenly marked corrupt:
> 1. Pipeline is open with 2 replicas
> 2. DN1 generates a block report but is slow in sending to the NN (eg some flaky network).
It gets "stuck" right before the block report RPC.
> 3. Client closes the file.
> 4. DN2 is fast and sends blockReceived to the NN. NN marks the block as COMPLETE
> 5. DN1's block report proceeds, and includes the block in an RBW state.
> 6. (x) NN incorrectly marks the replica as corrupt, since it is an RBW replica on a COMPLETE
block.

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