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https://issues.apache.org/jira/browse/HADOOP-9451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13621162#comment-13621162
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Luke Lu commented on HADOOP-9451:
---------------------------------
Some tests in TestNetworkTopology uses MiniDFSCluster, so you'll need to split
the test suite into two. Feel free to provide two patches (two jiras as well,
one for common one for HDFS) :)
> Node with one topology layer should be handled as fault topology when
> NodeGroup layer is enabled
> ------------------------------------------------------------------------------------------------
>
> Key: HADOOP-9451
> URL: https://issues.apache.org/jira/browse/HADOOP-9451
> Project: Hadoop Common
> Issue Type: Bug
> Components: net
> Affects Versions: 1.1.2
> Reporter: Junping Du
> Assignee: Junping Du
> Attachments: HADOOP-9451.patch, 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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