Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/12899#discussion_r62112750
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -1097,8 +1097,8 @@ class DAGScheduler(
throw new SparkException(s"attempted to access non-existent
accumulator $id")
}
acc.merge(updates.asInstanceOf[AccumulatorV2[Any, Any]])
- // To avoid UI cruft, ignore cases where value wasn't updated
- if (acc.name.isDefined && !updates.isZero) {
+ // Only display named accumulators on UI.
+ if (acc.name.isDefined) {
--- End diff --
it's because the executor no longer sends back updates where the value is
zero, so the second condition is always assumed to be true. Maybe we should add
an assert or something instead.
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