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https://issues.apache.org/jira/browse/SPARK-21798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16137310#comment-16137310
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Thomas Graves commented on SPARK-21798:
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You could need to add things to the classpath for custom UI filters, certain
hadoop configurations may need extra things added, like paths to rack switch
resolvers, etc.
I think it would make sense to add back in a SPARK_DAEMON_CLASSPATH. I would
think people could want something similar for the standalone mode as well as
history server so a general daemon one would make sense. But if people don't
think anyone will use it in standalone mode we could just make a history server
specific env for it as well.
> No config to replace deprecated SPARK_CLASSPATH config for launching daemons
> like History Server
> ------------------------------------------------------------------------------------------------
>
> Key: SPARK-21798
> URL: https://issues.apache.org/jira/browse/SPARK-21798
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.2.0
> Reporter: Sanket Reddy
> Priority: Minor
>
> History Server Launch uses SparkClassCommandBuilder for launching the server.
> It is observed that SPARK_CLASSPATH has been removed and deprecated. For
> spark-submit this takes a different route and spark.driver.extraClasspath
> takes care of specifying additional jars in the classpath that were
> previously specified in the SPARK_CLASSPATH. Right now the only way specify
> the additional jars for launching daemons such as history server is using
> SPARK_DIST_CLASSPATH
> (https://spark.apache.org/docs/latest/hadoop-provided.html) but this I
> presume is a distribution classpath. It would be nice to have a similar
> config like spark.driver.extraClasspath for launching daemons similar to
> history server.
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