Davies Liu created SPARK-10494:
----------------------------------

             Summary: 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
            Priority: Critical


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).



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org

Reply via email to