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https://issues.apache.org/jira/browse/SPARK-21004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16040426#comment-16040426
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Apache Spark commented on SPARK-21004:
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User 'JackYangzg' has created a pull request for this issue:
https://github.com/apache/spark/pull/18225
> remove the never used declaration in function warnDeprecatedVersions
> --------------------------------------------------------------------
>
> Key: SPARK-21004
> URL: https://issues.apache.org/jira/browse/SPARK-21004
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: yangZhiguo
> Priority: Minor
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> the function {warnDeprecatedVersions} of class SparkContext, the declaration
> of
> val javaVersion = System.getProperty("java.version").split("[+.\\-]+", 3)
> is never used in this function
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