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https://issues.apache.org/jira/browse/HDFS-6808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14120558#comment-14120558
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Colin Patrick McCabe commented on HDFS-6808:
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Oh, also, a unit test would be nice here. We could have a bogus configuration
key just used in the test or something. We should test the error-reporting
functionality of the RPC as well. I don't think we need to do an end-to-end
test of the command, just call the RPC maybe.
> Add command line option to ask DataNode reload configuration.
> -------------------------------------------------------------
>
> Key: HDFS-6808
> URL: https://issues.apache.org/jira/browse/HDFS-6808
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: 2.5.0
> Reporter: Lei (Eddy) Xu
> Assignee: Lei (Eddy) Xu
> Attachments: HDFS-6808.000.combo.patch, HDFS-6808.000.patch
>
>
> The workflow of dynamically changing data volumes on DataNode is
> # Users manually changed {{dfs.datanode.data.dir}} in the configuration file
> # User use command line to notify DN to reload configuration and updates its
> volumes.
> This work adds command line support to notify DN to reload configuration.
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