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  1. Spark
  2. SPARK-10494

Multiple Python UDFs together with aggregation or sort merge join may cause OOM (failed to acquire memory)

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Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • 1.5.0
    • 1.5.1, 1.6.0
    • PySpark, SQL
    • None

    Description

      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).

      Attachments

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. SPARK-8632 Poor Python UDF performance because of RDD caching

          • Blocker - Blocks development and/or testing work, production could not run
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. SPARK-10685 Misaligned data with RDD.zip and DataFrame.withColumn after repartition

          • Blocker - Blocks development and/or testing work, production could not run
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. SPARK-10714 Refactor PythonRDD to decouple iterator computation from PythonRDD

          • Major - Major loss of function.
          • Resolved

          Activity

            People

              rxin Reynold Xin
              davies Davies Liu
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              Dates

                Created:
                Updated:
                Resolved: