dongjoon-hyun commented on code in PR #59707:
URL: https://github.com/apache/spark/pull/59707#discussion_r4350086285
##########
core/src/test/scala/org/apache/spark/util/ThreadUtilsSuite.scala:
##########
@@ -132,6 +132,111 @@ class ThreadUtilsSuite extends SparkFunSuite {
}
}
+ test("SPARK-60466: shutdown interrupts running tasks and drops queued tasks
after the " +
+ "grace period") {
+ val executor =
ThreadUtils.newDaemonSingleThreadExecutor("ThreadUtilsSuite-shutdown")
+ try {
+ val started = new CountDownLatch(1)
+ val interrupted = new CountDownLatch(1)
+ @volatile var queuedTaskRan = false
+ executor.execute(() => {
+ started.countDown()
+ try {
+ new CountDownLatch(1).await()
+ } catch {
+ case _: InterruptedException => interrupted.countDown()
+ }
+ })
+ executor.execute(() => queuedTaskRan = true)
+ assert(started.await(10, TimeUnit.SECONDS))
+
+ ThreadUtils.shutdown(executor, 100.milliseconds)
+ assert(interrupted.await(10, TimeUnit.SECONDS))
+ eventually(timeout(10.seconds)) {
+ assert(executor.isTerminated)
+ }
+ assert(!queuedTaskRan)
+ } finally {
+ executor.shutdownNow()
+ }
+ }
+
+ test("SPARK-60466: shutdown drops pending delayed tasks after the grace
period") {
+ val executor =
+
ThreadUtils.newDaemonSingleThreadScheduledExecutor("ThreadUtilsSuite-shutdown-delayed")
+ try {
+ // A scheduled executor still runs its delayed tasks after shutdown() by
default, so only
+ // shutdownNow() can terminate it before the delay elapses.
+ executor.schedule(new Runnable {
+ override def run(): Unit = {}
+ }, 1, TimeUnit.HOURS)
+
+ ThreadUtils.shutdown(executor, 100.milliseconds)
+ eventually(timeout(10.seconds)) {
+ assert(executor.isTerminated)
+ }
+ } finally {
+ executor.shutdownNow()
+ }
+ }
+
+ test("SPARK-60466: shutdown waits for tasks that finish within the grace
period") {
+ val executor =
ThreadUtils.newDaemonSingleThreadExecutor("ThreadUtilsSuite-shutdown-graceful")
+ try {
+ @volatile var interrupted = false
+ @volatile var queuedTaskRan = false
+ executor.execute(() => {
+ try {
+ Thread.sleep(500)
+ } catch {
+ case _: InterruptedException => interrupted = true
+ }
+ })
+ executor.execute(() => queuedTaskRan = true)
+
+ ThreadUtils.shutdown(executor, 1.minute)
+ assert(executor.isTerminated)
+ assert(!interrupted)
+ assert(queuedTaskRan)
+ } finally {
+ executor.shutdownNow()
+ }
+ }
+
+ test("SPARK-60466: shutdown forces termination when the calling thread is
interrupted") {
+ val executor =
+
ThreadUtils.newDaemonSingleThreadExecutor("ThreadUtilsSuite-shutdown-interrupted")
+ try {
+ val started = new CountDownLatch(1)
+ val interrupted = new CountDownLatch(1)
+ executor.execute(() => {
Review Comment:
Thank you for the suggestion. I'd like to keep each test case
self-contained, like the other test cases in this suite.
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