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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-6680) BlockPlacementPolicyDefault does not choose favored nodes correctly
Date Mon, 21 Jul 2014 23:28:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Tsz Wo Nicholas Sze updated HDFS-6680:

       Resolution: Fixed
    Fix Version/s: 2.5.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

Thanks Devaraj for reviewing the patches.

I have committed this.

> 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
>             Fix For: 2.5.0
>         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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