Yiqun Lin created HDFS-10813:
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Summary: DiskBalancer: Add the getNodeList method in Command
Key: HDFS-10813
URL: https://issues.apache.org/jira/browse/HDFS-10813
Project: Hadoop HDFS
Issue Type: Sub-task
Components: balancer & mover
Reporter: Yiqun Lin
Assignee: Yiqun Lin
Priority: Minor
The method {{Command#getNodeList}} in DiskBalancer was added in HDFS-9545, but
it's never used. We can improve that in the following aspects:
1.Change {{private}} to {{protected}} so that the subclass can use that method
in the future.
2.Reuse the method {{Command#getNodeList}} and to construct a new method
like this {{List<DiskBalancerDataNode> getNodes(String listArg)}}. This method
can be used for getting multiple nodes in the future. For example, if we want
to use {{hdfs diskbalancer -report -node}} or {{hdfs diskbalancer -plan}} with
multiple specified nodes, that method can be used.
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