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https://issues.apache.org/jira/browse/SPARK-14859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254665#comment-15254665
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Nick White commented on SPARK-14859:
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I've got a PR for this here: https://github.com/apache/spark/pull/12620
> [PYSPARK] Make Lambda Serializer Configurable
> ---------------------------------------------
>
> Key: SPARK-14859
> URL: https://issues.apache.org/jira/browse/SPARK-14859
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 2.0.0
> Reporter: Nick White
>
> Currently lambdas (e.g. used in RDD.map) are serialized by a hardcoded
> reference to the CloudPickleSerializer. The serializer should be
> configurable, as these lambdas may contain complex objects that need custom
> serialization.
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