Github user tedyu commented on a diff in the pull request: https://github.com/apache/spark/pull/12776#discussion_r61576634 --- Diff: core/src/main/scala/org/apache/spark/NewAccumulator.scala --- @@ -209,9 +210,9 @@ private[spark] object AccumulatorContext { */ def newId(): Long = nextId.getAndIncrement - def numAccums: Int = synchronized(originals.size) + def numAccums: Int = originals.size - def accumIds: Set[Long] = synchronized(originals.keySet().asScala.toSet) + def accumIds: Set[Long] = originals.keySet().asScala.toSet --- End diff -- This is only used in InternalAccumulatorSuite.scala
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