[jira] [Resolved] (HDFS-8500) Improve refreshNodes in DFSAdmin to support hdfs federation

["Zhang Wei (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-8500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhang Wei resolved HDFS-8500.
-----------------------------
    Resolution: Not A Problem

$HADOOP_PREFIX/sbin/refresh-namenodes.sh is appropriate choice.

> Improve refreshNodes in DFSAdmin to support hdfs federation
> -----------------------------------------------------------
>
>                 Key: HDFS-8500
>                 URL: https://issues.apache.org/jira/browse/HDFS-8500
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: federation
>    Affects Versions: 2.7.0
>            Reporter: Zhang Wei
>            Assignee: Zhang Wei
>            Priority: Minor
>              Labels: decommission, federation, refreshnodes
>
> In hdfs federated cluster, we find the dfsadmin command "hdfs dfsadmin -refreshNodes"  can only refresh the nameservice (or namenode) which configured in fs.defaultFS. The other nameservices configured in hdfs-site.xml can't be refreshed unless changing the fs.defaultFS value and run this command again. I think we need additional parameters as following to give a convenient way: 
> [-a] fresh all namenodes configured in hdfs-site.xml.
> [-ns <nameserviceId>] specify a nameservice to refresh.
> [host:ipc_port] specify a nn to refresh.
> please give your opinions. Thanks!



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