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https://issues.apache.org/jira/browse/SPARK-12386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15061111#comment-15061111
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Shixiong Zhu commented on SPARK-12386:
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If the user doesn't depend on the assumption that `spark.executor.port` is the
port of Akka actor system in executor side, they can just remove the config.
Even in 1.5, the assumption is unreliable because multiple executors may run in
the same host.
> Setting "spark.executor.port" leads to NPE in SparkEnv
> ------------------------------------------------------
>
> Key: SPARK-12386
> URL: https://issues.apache.org/jira/browse/SPARK-12386
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.6.0
> Reporter: Marcelo Vanzin
> Assignee: Apache Spark
> Priority: Critical
>
> From the list:
> {quote}
> when we set spark.executor.port in 1.6, we get thrown a NPE in
> SparkEnv$.create(SparkEnv.scala:259).
> {quote}
> Fix is simple; probably should make it to 1.6.0 since it will affect anyone
> using that config options, but I'll leave that to the release manager's
> discretion.
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