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From "Luke Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4652) Node with one topology layer should be handled as fault topology when NodeGroup layer is enabled
Date Mon, 01 Apr 2013 23:19:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13619306#comment-13619306
] 

Luke Lu commented on HDFS-4652:
-------------------------------

The patches lgtm. +1. Will commit shortly.
                
> Node with one topology layer should be handled as fault topology when NodeGroup layer
is enabled
> ------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-4652
>                 URL: https://issues.apache.org/jira/browse/HDFS-4652
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 1.1.2
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: HDFS-4652-branch1.patch, HDFS-4652.patch
>
>
> Currently, nodes with one layer topology are allowed to join in the cluster that with
enabling NodeGroup layer which cause some exception cases. 
> When NodeGroup layer is enabled, the cluster should assumes that at least two layer (Rack/NodeGroup)
is valid topology for each nodes, so should throw exceptions for one layer node in joining.

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