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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.util
import java.util.concurrent.{CountDownLatch, TimeUnit}
import scala.util.Random
import com.google.common.util.concurrent.Uninterruptibles
import org.apache.spark.SparkFunSuite
class UninterruptibleThreadSuite extends SparkFunSuite {
/** Sleep millis and return true if it's interrupted */
private def sleep(millis: Long): Boolean = {
try {
Thread.sleep(millis)
false
} catch {
case _: InterruptedException =>
true
}
}
test("interrupt when runUninterruptibly is running") {
val enterRunUninterruptibly = new CountDownLatch(1)
@volatile var hasInterruptedException = false
@volatile var interruptStatusBeforeExit = false
val t = new UninterruptibleThread("test") {
override def run(): Unit = {
runUninterruptibly {
enterRunUninterruptibly.countDown()
hasInterruptedException = sleep(1000)
}
interruptStatusBeforeExit = Thread.interrupted()
}
}
t.start()
assert(enterRunUninterruptibly.await(10, TimeUnit.SECONDS), "await timeout")
t.interrupt()
t.join()
assert(hasInterruptedException === false)
assert(interruptStatusBeforeExit === true)
}
test("interrupt before runUninterruptibly runs") {
val interruptLatch = new CountDownLatch(1)
@volatile var hasInterruptedException = false
@volatile var interruptStatusBeforeExit = false
val t = new UninterruptibleThread("test") {
override def run(): Unit = {
Uninterruptibles.awaitUninterruptibly(interruptLatch, 10, TimeUnit.SECONDS)
try {
runUninterruptibly {
assert(false, "Should not reach here")
}
} catch {
case _: InterruptedException => hasInterruptedException = true
}
interruptStatusBeforeExit = Thread.interrupted()
}
}
t.start()
t.interrupt()
interruptLatch.countDown()
t.join()
assert(hasInterruptedException === true)
assert(interruptStatusBeforeExit === false)
}
test("nested runUninterruptibly") {
val enterRunUninterruptibly = new CountDownLatch(1)
val interruptLatch = new CountDownLatch(1)
@volatile var hasInterruptedException = false
@volatile var interruptStatusBeforeExit = false
val t = new UninterruptibleThread("test") {
override def run(): Unit = {
runUninterruptibly {
enterRunUninterruptibly.countDown()
Uninterruptibles.awaitUninterruptibly(interruptLatch, 10, TimeUnit.SECONDS)
hasInterruptedException = sleep(1)
runUninterruptibly {
if (sleep(1)) {
hasInterruptedException = true
}
}
if (sleep(1)) {
hasInterruptedException = true
}
}
interruptStatusBeforeExit = Thread.interrupted()
}
}
t.start()
assert(enterRunUninterruptibly.await(10, TimeUnit.SECONDS), "await timeout")
t.interrupt()
interruptLatch.countDown()
t.join()
assert(hasInterruptedException === false)
assert(interruptStatusBeforeExit === true)
}
test("stress test") {
@volatile var hasInterruptedException = false
val t = new UninterruptibleThread("test") {
override def run(): Unit = {
for (i <- 0 until 100) {
try {
runUninterruptibly {
if (sleep(Random.nextInt(10))) {
hasInterruptedException = true
}
runUninterruptibly {
if (sleep(Random.nextInt(10))) {
hasInterruptedException = true
}
}
if (sleep(Random.nextInt(10))) {
hasInterruptedException = true
}
}
Uninterruptibles.sleepUninterruptibly(Random.nextInt(10), TimeUnit.MILLISECONDS)
// 50% chance to clear the interrupted status
if (Random.nextBoolean()) {
Thread.interrupted()
}
} catch {
case _: InterruptedException =>
// The first runUninterruptibly may throw InterruptedException if the interrupt status
// is set before running `f`.
}
}
}
}
t.start()
for (i <- 0 until 400) {
Thread.sleep(Random.nextInt(10))
t.interrupt()
}
t.join()
assert(hasInterruptedException === false)
}
}
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