Github user squito commented on a diff in the pull request: https://github.com/apache/spark/pull/21068#discussion_r184575258 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala --- @@ -170,8 +170,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp if (executorDataMap.contains(executorId)) { executorRef.send(RegisterExecutorFailed("Duplicate executor ID: " + executorId)) context.reply(true) - } else if (scheduler.nodeBlacklist != null && - scheduler.nodeBlacklist.contains(hostname)) { + } else if (scheduler.nodeBlacklistWithExpiryTimes.contains(hostname)) { --- End diff -- this change seems to be causing all the test failures. Its because there are tests that use a mock TaskSchedulerImpl, and so `scheduler.nodeBlacklistWithExpiryTimes` returns null from the mock.
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