Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/8090#discussion_r36708799
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -787,9 +787,10 @@ class DAGScheduler(
}
}
+ // Create internal accumulators if the stage has no accumulators
initialized.
// Reset internal accumulators only if this stage is not partially
submitted
// Otherwise, we may override existing accumulator values from some
tasks
- if (allPartitions == partitionsToCompute) {
+ if (stage.internalAccumulators.isEmpty || allPartitions ==
partitionsToCompute) {
--- End diff --
@andrewor14 we don't actually care about clearing the values, right? Can
we simplify this to just `if (stage.internalAccumulators.isEmpty)`? Or just
initialize them when a `Stage` is constructed?
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