Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/17596#discussion_r113599198
--- Diff: core/src/main/scala/org/apache/spark/executor/TaskMetrics.scala
---
@@ -308,16 +305,17 @@ private[spark] object TaskMetrics extends Logging {
*/
def fromAccumulators(accums: Seq[AccumulatorV2[_, _]]): TaskMetrics = {
val tm = new TaskMetrics
- val (internalAccums, externalAccums) =
- accums.partition(a => a.name.isDefined &&
tm.nameToAccums.contains(a.name.get))
-
- internalAccums.foreach { acc =>
- val tmAcc =
tm.nameToAccums(acc.name.get).asInstanceOf[AccumulatorV2[Any, Any]]
- tmAcc.metadata = acc.metadata
- tmAcc.merge(acc.asInstanceOf[AccumulatorV2[Any, Any]])
+ for (acc <- accums) {
+ val name = AccumulatorContext.get(acc.id).flatMap(_.name)
+ if (name.isDefined && tm.nameToAccums.contains(name.get)) {
+ val tmAcc =
tm.nameToAccums(name.get).asInstanceOf[AccumulatorV2[Any, Any]]
+ tmAcc.metadata = acc.metadata
+ tmAcc.merge(acc.asInstanceOf[AccumulatorV2[Any, Any]])
+ } else {
+ acc.metadata = acc.metadata.copy(name = name)
--- End diff --
Oh right. Another question is, since name is coming from acc.name, why we
copy it back to acc.metadata?
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