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https://issues.apache.org/jira/browse/SPARK-10494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-10494.
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Resolution: Fixed
Assignee: Reynold Xin
Fix Version/s: 1.5.1
> Multiple Python UDFs together with aggregation or sort merge join may cause
> OOM (failed to acquire memory)
> ----------------------------------------------------------------------------------------------------------
>
> Key: SPARK-10494
> URL: https://issues.apache.org/jira/browse/SPARK-10494
> Project: Spark
> Issue Type: Bug
> Components: PySpark, SQL
> Affects Versions: 1.5.0
> Reporter: Davies Liu
> Assignee: Reynold Xin
> Priority: Critical
> Fix For: 1.5.1
>
>
> The RDD cache for Python UDF is removed in 1.4, then N Python UDFs in one
> query stage could end up evaluate upstream (SparkPlan) 2^N times.
> In 1.5, If there is aggregation or sort merge join in upstream SparkPlan,
> they will cause OOM (failed to acquire memory).
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