Github user ericvandenbergfb commented on a diff in the pull request:
https://github.com/apache/spark/pull/18427#discussion_r126228249
--- Diff:
core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala ---
@@ -1172,6 +1172,50 @@ class TaskSetManagerSuite extends SparkFunSuite with
LocalSparkContext with Logg
assert(blacklistTracker.isNodeBlacklisted("host1"))
}
+ test("update blacklist before adding pending task to avoid race
condition") {
+ // When a task fails, it should apply the blacklist policy prior to
+ // retrying the task otherwise there's a race condition where run on
+ // the same executor that it was intended to be black listed from.
+ val conf = new SparkConf().
+ set(config.BLACKLIST_ENABLED, true).
+ set(config.MAX_TASK_ATTEMPTS_PER_EXECUTOR, 1)
--- End diff --
Yes, I added it to make the test code (configuration) inputs more explicit,
but I can remove if it's a default unlikely to change.
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