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https://issues.apache.org/jira/browse/HDFS-10813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wang updated HDFS-10813:
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Fix Version/s: 3.0.0-alpha2
> 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
> Fix For: 2.9.0, 3.0.0-alpha2
>
> Attachments: HDFS-10813.001.patch
>
>
> 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. Now these
> commands only support one node.
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