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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6680) BlockPlacementPolicyDefault does not choose favored nodes correctly
Date Mon, 21 Jul 2014 23:24:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14069500#comment-14069500
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Hudson commented on HDFS-6680:
------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #5928 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/5928/])
HDFS-6680. BlockPlacementPolicyDefault does not choose favored nodes correctly. (szetszwo:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1612427)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFavoredNodesEndToEnd.java


> BlockPlacementPolicyDefault does not choose favored nodes correctly
> -------------------------------------------------------------------
>
>                 Key: HDFS-6680
>                 URL: https://issues.apache.org/jira/browse/HDFS-6680
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>         Attachments: h6680_20140714.patch, h6680_20140716.patch
>
>
> In one of the chooseTarget(..) methods, it tries all the favoredNodes to chooseLocalNode(..).
 It expects chooseLocalNode to return null if the local node is not a good target.  Unfortunately,
chooseLocalNode will fallback to chooseLocalRack but not returning null.



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