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https://issues.apache.org/jira/browse/HDFS-13105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mukul Kumar Singh resolved HDFS-13105.
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Resolution: Not A Problem
As pointed by [~kihwal] & [~rajive], -refreshSuperUserGroupsConfiguration
provides method to update proxy user information on NN.
> Make hadoop proxy user changes reconfigurable in Datanode
> ---------------------------------------------------------
>
> Key: HDFS-13105
> URL: https://issues.apache.org/jira/browse/HDFS-13105
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Mukul Kumar Singh
> Assignee: Mukul Kumar Singh
> Priority: Major
>
> Currently any changes to add/delete a new proxy user requires DN restart
> requiring a downtime. This jira proposes to make the changes in proxy/user
> configuration reconfiguration via that ReconfigurationProtocol so that the
> changes can take effect without a DN restart. For details please refer
> https://hadoop.apache.org/docs/r2.8.0/hadoop-project-dist/hadoop-common/Superusers.html.
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