[GitHub] [spark] wangshuo128 commented on a change in pull request #26924: [SPARK-30285][CORE] Fix deadlock between LiveListenerBus#stop and AsyncEventQueue#removeListenerOnError

[GitBox <gi...@apache.org>]

wangshuo128 commented on a change in pull request #26924: [SPARK-30285][CORE] Fix deadlock between LiveListenerBus#stop and AsyncEventQueue#removeListenerOnError
URL: https://github.com/apache/spark/pull/26924#discussion_r360633022
 
 

 ##########
 File path: core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
 ##########
 @@ -529,6 +529,46 @@ class SparkListenerSuite extends SparkFunSuite with LocalSparkContext with Match
     }
   }
 
+  Seq(true, false).foreach { throwInterruptedException =>
+    val suffix = if (throwInterruptedException) "throw interrupt" else "set Thread interrupted"
+    test(s"SPARK-30285: Fix deadlock in AsyncEventQueue.removeListenerOnError: $suffix") {
+      val conf = new SparkConf(false)
+        .set(LISTENER_BUS_EVENT_QUEUE_CAPACITY, 5)
+      val bus = new LiveListenerBus(conf)
+      val counter1 = new BasicJobCounter()
+      val counter2 = new BasicJobCounter()
+      val interruptingListener = new DelayInterruptingJobCounter(throwInterruptedException, 3)
+      bus.addToSharedQueue(counter1)
+      bus.addToSharedQueue(interruptingListener)
+      bus.addToEventLogQueue(counter2)
+      assert(bus.activeQueues() === Set(SHARED_QUEUE, EVENT_LOG_QUEUE))
+      assert(bus.findListenersByClass[BasicJobCounter]().size === 2)
+      assert(bus.findListenersByClass[DelayInterruptingJobCounter]().size === 1)
+
+      bus.start(mockSparkContext, mockMetricsSystem)
+
+      (0 until 5).foreach { jobId =>
+        bus.post(SparkListenerJobEnd(jobId, jobCompletionTime, JobSucceeded))
+      }
+
+      // Call bus.stop in a separate thread, otherwise we will block here until bus is stopped
+      val stoppingThread = new Thread(() => {
+        bus.stop()
+      })
+      stoppingThread.start()
+      // Notify interrupting listener starts to work
+      interruptingListener.sleep = false
 
 Review comment:
   Maybe we could check the `stopped` status of `bus` in the listener. 
   This would be better than using a `CountDownLatch`, however, it can't get rid of racing completely. WDYT?

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org
For additional commands, e-mail: reviews-help@spark.apache.org