apeming commented on issue #27222: [SPARK-30519][CORE] Use spark.executorEnv.HADOOP_USER_NAME to set executor's hadoop user URL: https://github.com/apache/spark/pull/27222#issuecomment-586543718 > This is a behavior change, and I don't think we should introduce this change by the approach proposed this way. > > If both `SPARK_USER` and `HADOOP_USER_NAME` are specified in the env, we should prioritize `SPARK_USER` over `HADOOP_USER_NAME`. Also, I'm hesitate whether we should support `HADOOP_USER_NAME` at all. But `SPARK_USER` is used for scheduler such as Mesos, Kubernetes and `HADOOP_USER_NAME` is used for Hadoop cluster such HDFS. At Spark on Kubernetes, `SPARK_USER` is not over `HADOOP_USER_NAME`
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