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https://issues.apache.org/jira/browse/SPARK-23635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-23635:
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    Assignee: Apache Spark

> Spark executor env variable is overwritten by same name AM env variable
> -----------------------------------------------------------------------
>
>                 Key: SPARK-23635
>                 URL: https://issues.apache.org/jira/browse/SPARK-23635
>             Project: Spark
>          Issue Type: Bug
>          Components: YARN
>    Affects Versions: 2.3.0
>            Reporter: Saisai Shao
>            Assignee: Apache Spark
>            Priority: Minor
>
> In the current Spark on YARN code, AM always will copy and overwrite its env 
> variables to executors, so we cannot set different values for executors.
> To reproduce issue, user could start spark-shell like:
> {code:java}
> ./bin/spark-shell --master yarn-client --conf 
> spark.executorEnv.SPARK_ABC=executor_val --conf  
> spark.yarn.appMasterEnv.SPARK_ABC=am_val
> {code}
> Then check executor env variables by
> {code:java}
> sc.parallelize(1 to 1).flatMap \{ i => sys.env.toSeq 
> }.collect.foreach(println)
> {code}
> You will always get {{am_val}} instead of {{executor_val}}. So we should not 
> let AM to overwrite specifically set executor env variables.



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