Genmao Yu created SPARK-27503:
---------------------------------

             Summary: JobGenerator thread exit for some fatal errors but 
application keeps running
                 Key: SPARK-27503
                 URL: https://issues.apache.org/jira/browse/SPARK-27503
             Project: Spark
          Issue Type: Bug
          Components: DStreams
    Affects Versions: 3.0.0
            Reporter: Genmao Yu


JobGenerator thread (including some other EventLoop threads) may exit for some 
fatal error, like OOM, but Spark Streaming job keep running with no batch job 
generating. Currently, we only report any non-fatal error. 
{code}
override def run(): Unit = {
      try {
        while (!stopped.get) {
          val event = eventQueue.take()
          try {
            onReceive(event)
          } catch {
            case NonFatal(e) =>
              try {
                onError(e)
              } catch {
                case NonFatal(e) => logError("Unexpected error in " + name, e)
              }
          }
        }
      } catch {
        case ie: InterruptedException => // exit even if eventQueue is not empty
        case NonFatal(e) => logError("Unexpected error in " + name, e)
      }
    }
{code}

In some corner cases, these event threads may exit with OOM error, but driver 
thread can still keep running.



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