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https://issues.apache.org/jira/browse/SPARK-2454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14064036#comment-14064036
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Andrew Or commented on SPARK-2454:
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There may be multiple installations of Spark on the executor machine, in which
case a global SPARK_HOME environment variable is not sufficient. What I am
suggesting is that we should still keep the option of allowing the driver to
overwrite executor spark homes (spark.executor.home), and only overwrite the
executor SPARK_HOME if this is specified.
> Separate driver spark home from executor spark home
> ---------------------------------------------------
>
> Key: SPARK-2454
> URL: https://issues.apache.org/jira/browse/SPARK-2454
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.1.0
> Reporter: Andrew Or
> Fix For: 1.1.0
>
>
> The driver may not always share the same directory structure as the
> executors. It makes little sense to always re-use the driver's spark home on
> the executors.
> https://github.com/apache/spark/pull/1244/ is an open effort to fix this.
> However, this still requires us to set SPARK_HOME on all the executor nodes.
> Really we should separate this out into something like
> spark.driver.home
> spark.executor.home
> rather than re-using SPARK_HOME everywhere.
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