Github user tedyu commented on a diff in the pull request: https://github.com/apache/spark/pull/11586#discussion_r55634802 --- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala --- @@ -613,7 +613,12 @@ class DAGScheduler( properties: Properties): Unit = { val start = System.nanoTime val waiter = submitJob(rdd, func, partitions, callSite, resultHandler, properties) - Await.ready(waiter.completionFuture, atMost = Duration.Inf) + // Note: Do not call Await.ready(future) because that calls `scala.concurrent.blocking`, --- End diff -- BlockManager#doPut() does this on line 891: ``` Await.ready(replicationFuture, Duration.Inf) ``` Should that be replaced as well ?
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