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https://issues.apache.org/jira/browse/SPARK-19482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15855240#comment-15855240
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Apache Spark commented on SPARK-19482:
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User 'uncleGen' has created a pull request for this issue:
https://github.com/apache/spark/pull/16827
> Fail it if 'spark.master' is set with different value
> -----------------------------------------------------
>
> Key: SPARK-19482
> URL: https://issues.apache.org/jira/browse/SPARK-19482
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.0.2, 2.1.0
> Reporter: Genmao Yu
>
> First, there is no need to set 'spark.master' multi-times with different
> values. Second, It is possible for users to set the different 'spark.master'
> in code with
> `spark-submit` command, and will confuse users. So, we should do once check
> if the 'spark.master' already exists in settings and if the previous value is
> the same with current value. Throw a IllegalArgumentException when previous
> value is different with current value.
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