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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8204) Balancer: 2 replicas ends in same node after running balance.
Date Tue, 21 Apr 2015 18:20:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14505424#comment-14505424
] 

Tsz Wo Nicholas Sze commented on HDFS-8204:
-------------------------------------------

This seems a duplicate of HDFS-8147.

> Balancer: 2 replicas ends in same node after running balance.
> -------------------------------------------------------------
>
>                 Key: HDFS-8204
>                 URL: https://issues.apache.org/jira/browse/HDFS-8204
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer & mover
>            Reporter: Walter Su
>            Assignee: Walter Su
>         Attachments: HDFS-8204.001.patch
>
>
> Balancer moves blocks between Datanode(Ver. <2.6 ).
> Balancer moves blocks between StorageGroups ( introduced by HDFS-6584) , in the new version(Ver.
>=2.6) .
> function
> {code}
> class DBlock extends Locations<StorageGroup>
> DBlock.isLocatedOn(StorageGroup loc)
> {code}
> is flawed, may causes 2 replicas ends in same node after running balance.



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