Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/21898#discussion_r207758008
--- Diff: core/src/main/scala/org/apache/spark/BarrierTaskContext.scala ---
@@ -80,7 +101,45 @@ class BarrierTaskContext(
@Experimental
@Since("2.4.0")
def barrier(): Unit = {
- // TODO SPARK-24817 implement global barrier.
+ val callSite = Utils.getCallSite()
+ logInfo(s"Task $taskAttemptId from Stage $stageId(Attempt
$stageAttemptNumber) has entered " +
+ s"the global sync, current barrier epoch is $barrierEpoch.")
+ logTrace(s"Current callSite: $callSite")
--- End diff --
+1
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