zsxwing commented on a change in pull request #26072: [SPARK-29413][CORE]
Rewrite ThreadUtils.parmap to avoid TraversableLike, gone in 2.13
URL: https://github.com/apache/spark/pull/26072#discussion_r333249219
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File path: core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
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@@ -275,13 +274,7 @@ private[spark] object ThreadUtils {
* @return new collection in which each element was given from the input
collection `in` by
* applying the lambda function `f`.
*/
- def parmap[I, O, Col[X] <: TraversableLike[X, Col[X]]]
- (in: Col[I], prefix: String, maxThreads: Int)
- (f: I => O)
- (implicit
- cbf: CanBuildFrom[Col[I], Future[O], Col[Future[O]]], // For in.map
- cbf2: CanBuildFrom[Col[Future[O]], O, Col[O]] // for Future.sequence
- ): Col[O] = {
+ def parmap[I, O](in: Seq[I], prefix: String, maxThreads: Int)(f: I => O):
Seq[O] = {
Review comment:
This one works for 2.12: https://github.com/apache/spark/pull/26077 Could
you try it with Scala 2.13?
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