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  1. Spark
  2. SPARK-39864

ExecutionListenerManager's registration of the ExecutionListenerBus should be lazy

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 3.4.0
    • 3.4.0
    • SQL
    • None

    Description

      Today, ExecutionListenerManager eagerly registers an ExecutionListenerBus SparkListener when it is created, even if the SparkSession has no query execution listeners registered. In applications with many short-lived SparkSessions, this can cause a buildup of empty listeners on the shared listener bus, increasing Spark listener processing times on the driver.

      If we make the registration lazy then we avoid this driver-side listener performance overhead.

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            joshrosen Josh Rosen
            joshrosen Josh Rosen
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