DENG FEI created SPARK-25429:
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Summary: SparkListenerBus inefficient due to
'LiveStageMetrics#accumulatorIds:Array[Long]' data structure
Key: SPARK-25429
URL: https://issues.apache.org/jira/browse/SPARK-25429
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.3.1
Reporter: DENG FEI
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