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https://issues.apache.org/jira/browse/SPARK-9828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14682254#comment-14682254
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Apache Spark commented on SPARK-9828:
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User 'MechCoder' has created a pull request for this issue:
https://github.com/apache/spark/pull/8110
> Should not share `{}` among instances
> -------------------------------------
>
> Key: SPARK-9828
> URL: https://issues.apache.org/jira/browse/SPARK-9828
> Project: Spark
> Issue Type: Bug
> Components: ML, PySpark
> Affects Versions: 1.4.1, 1.5.0
> Reporter: Xiangrui Meng
> Assignee: Manoj Kumar
> Priority: Critical
>
> We use `{}` as the initial value in some places, e.g.,
> https://github.com/apache/spark/blob/master/python/pyspark/ml/param/__init__.py#L64.
> This makes instances sharing the same param map.
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