to #7108 (#7109)

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/runner/WorkflowExecuteThread.java

@@ -251,7 +251,7 @@ public class WorkflowExecuteThread implements Runnable {
     }
 
     private void handleEvents() {
-        while (this.stateEvents.size() > 0) {
+        while (!this.stateEvents.isEmpty()) {
 
             try {
                 StateEvent stateEvent = this.stateEvents.peek();