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Date: Mon, 23 Jan 2012 18:34:41 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-2822) processMisReplicatedBlock
 incorrectly identifies under-construction blocks as under-replicated
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    [ https://issues.apache.org/jira/browse/HDFS-2822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13191329#comment-13191329 ] 

Hudson commented on HDFS-2822:
------------------------------

Integrated in Hadoop-Hdfs-0.23-Commit #394 (See [https://builds.apache.org/job/Hadoop-Hdfs-0.23-Commit/394/])
    HDFS-2822. processMisReplicatedBlock incorrectly identifies under-construction blocks as under-replicated. Contributed by Todd Lipcon.

todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1234926
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestSafeMode.java

                
> processMisReplicatedBlock incorrectly identifies under-construction blocks as under-replicated
> ----------------------------------------------------------------------------------------------
>
>                 Key: HDFS-2822
>                 URL: https://issues.apache.org/jira/browse/HDFS-2822
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha, name-node
>    Affects Versions: 0.23.0, 0.24.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.24.0, 0.23.1
>
>         Attachments: hdfs-2822.txt
>
>
> When the NN processes mis-replicated blocks while exiting safemode, it considers under-construction blocks as under-replicated, inserting them into the neededReplicationsQueue. This makes them show up as corrupt in the metrics and UI momentarily, until they're pulled off the queue. At that point, it realizes that they aren't in fact under-replicated, correctly. This affects both the HA branch and trunk/23, best I can tell.

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