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https://issues.apache.org/jira/browse/HDFS-9846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15163534#comment-15163534
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Mingliang Liu commented on HDFS-9846:
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Thanks for pointing out [HADOOP-12563] which I missed it.
> Make DelegationTokenFetcher a Tool
> ----------------------------------
>
> Key: HDFS-9846
> URL: https://issues.apache.org/jira/browse/HDFS-9846
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: tools
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
>
> Currently the {{org.apache.hadoop.hdfs.tools.DelegationTokenFetcher}} is not
> implementing the {{Tool}} interface, while it should.
> This jira is to track the effort of refactoring the code to implement the
> {{Tool}} interface. The main benefits are unified generic option parsing,
> modifying the configurations, and conjunction with {{ToolRunner}}.
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