Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/12865#discussion_r61874253
--- Diff: core/src/main/scala/org/apache/spark/util/AccumulatorV2.scala ---
@@ -126,23 +126,9 @@ abstract class AccumulatorV2[IN, OUT] extends
Serializable {
def merge(other: AccumulatorV2[IN, OUT]): Unit
/**
- * Access this accumulator's current value; only allowed on driver.
+ * Defines the current value of this accumulator
*/
- final def value: OUT = {
- if (atDriverSide) {
--- End diff --
We should put this check in the old accumulator, to avoid breaking its
behaviour.
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