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https://issues.apache.org/jira/browse/SPARK-11904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shixiong Zhu updated SPARK-11904:
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Issue Type: Improvement (was: Bug)
> pyspark reduceByKeyAndWindow with invFunc=None requires checkpointing
> ---------------------------------------------------------------------
>
> Key: SPARK-11904
> URL: https://issues.apache.org/jira/browse/SPARK-11904
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 1.5.2, 1.6.0
> Reporter: David Tolpin
> Assignee: David Tolpin
> Fix For: 2.0.0
>
>
> When invFunc argument of reduceByKeyAndWindow is None, checkpointing should
> not be required. Scala implementation of reduceByKeyAndWindow handles this
> correctly and does not require checkpointing. Python version requires that
> checkpoint directory be specified, it is a bug.
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