Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/18076#discussion_r118138127
--- Diff: core/src/test/scala/org/apache/spark/rdd/RDDSuite.scala ---
@@ -1082,6 +1082,22 @@ class RDDSuite extends SparkFunSuite with
SharedSparkContext {
assert(totalPartitionCount == 10)
}
+ test("SPARK-18406: race between end-of-task and completion iterator read
lock release") {
+ val rdd = sc.parallelize(1 to 1000, 10)
+ rdd.cache()
+
+ rdd.mapPartitions { iter =>
+ ThreadUtils.runInNewThread("TestThread") {
--- End diff --
Nice use of this helper method. I wasn't aware of this, but it's pretty
nice. I'll use it in my own tests going forward.
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