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https://issues.apache.org/jira/browse/SPARK-17121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15934908#comment-15934908
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Chris Gianelloni commented on SPARK-17121:
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I find this useful when configuring Spark HistorySever to write to a
Kerberos-enabled HDFS.
> Support _HOST replacement for principal
> ---------------------------------------
>
> Key: SPARK-17121
> URL: https://issues.apache.org/jira/browse/SPARK-17121
> Project: Spark
> Issue Type: Improvement
> Components: Spark Submit
> Affects Versions: 2.0.0
> Reporter: Jeff Zhang
> Priority: Minor
>
> _HOST is a placeholder for the host which is used widely for hadoop
> components (like NN/DN/RM/NM and etc), this is useful for automatic
> configuration of some cluster deployment tool. It is would be nice that spark
> can also support this, especially useful for spark thrift server.
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