squito commented on a change in pull request #24817: [SPARK-27963][core] Allow
dynamic allocation without a shuffle service.
URL: https://github.com/apache/spark/pull/24817#discussion_r298722189
##########
File path:
core/src/main/scala/org/apache/spark/scheduler/dynalloc/ExecutorMonitor.scala
##########
@@ -137,6 +254,21 @@ private[spark] class ExecutorMonitor(
val executorId = event.taskInfo.executorId
val exec = executors.get(executorId)
if (exec != null) {
+ // If the task succeeded and the stage generates shuffle data, record
that this executor
+ // holds data for the shuffle. Note that this ignores speculation, since
this code is not
+ // directly tied to the map output tracker that knows exactly which
shuffle blocks are
Review comment:
ah you are right. I guess I was remembering pre-SPARK-20715.
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