[GitHub] [spark] uncleGen commented on a change in pull request #24400: [SPARK-27503][DStream] JobGenerator thread exit for some fatal errors but application keeps running

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uncleGen commented on a change in pull request #24400: [SPARK-27503][DStream] JobGenerator thread exit for some fatal errors but application keeps running
URL: https://github.com/apache/spark/pull/24400#discussion_r276565965
 
 

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 File path: core/src/main/scala/org/apache/spark/util/EventLoop.scala
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 @@ -100,7 +100,11 @@ private[spark] abstract class EventLoop[E](name: String) extends Logging {
    * Put the event into the event queue. The event thread will process it later.
    */
   def post(event: E): Unit = {
-    eventQueue.put(event)
+    if (eventThread.isAlive && !stopped.get) {
+      eventQueue.put(event)
+    } else {
+      onError(new IllegalStateException(s"$name has already been stopped."))
+    }
 
 Review comment:
   here we only need to report thread stopped. There is no exception messages, but it is fine because thread will throw exception when exit.

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