Junping Du created HDFS-4652:
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Summary: 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
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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