jiahong.li created SPARK-48391:
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Summary: use addAll instead of add function in TaskMetrics
Key: SPARK-48391
URL: https://issues.apache.org/jira/browse/SPARK-48391
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 3.5.1, 3.5.0
Reporter: jiahong.li
In the fromAccumulators method of TaskMetrics，we should use `
tm._externalAccums.addAll` instead of `tm._externalAccums.add`, as
_externalAccums is a instance of CopyOnWriteArrayList
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