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https://issues.apache.org/jira/browse/SPARK-36622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17408813#comment-17408813
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Thomas Graves commented on SPARK-36622:
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Supported _HOST for SHS likely makes sense since its a server.
> spark.history.kerberos.principal doesn't take value _HOST
> ---------------------------------------------------------
>
> Key: SPARK-36622
> URL: https://issues.apache.org/jira/browse/SPARK-36622
> Project: Spark
> Issue Type: Improvement
> Components: Deploy, Security, Spark Core
> Affects Versions: 3.0.1, 3.1.2
> Reporter: pralabhkumar
> Priority: Minor
>
> spark.history.kerberos.principal doesn't understand value _HOST.
> It says failure to login for principal : spark/_HOST@realm .
> It will be helpful to take _HOST value via config file and change it with
> current hostname(similar to what Hive does) . This will also help to run SHS
> on multiple machines without hardcoding principal hostname.
> .spark.history.kerberos.principal
>
> It require minor change in HistoryServer.scala in initSecurity method .
>
> Please let me know , if this request make sense , I'll create the PR .
>
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