fix MasterBaseTaskExecThread submit method bug

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

@@ -114,30 +114,29 @@ public class MasterBaseTaskExecThread implements Callable<Boolean> {
         Integer commitRetryInterval = masterConfig.getMasterTaskCommitInterval();
 
         int retryTimes = 1;
-        boolean taskDBFlag = false;
-        boolean taskQueueFlag = false;
+        boolean submitDB = false;
+        boolean submitQueue = false;
         TaskInstance task = null;
-        while (true){
+        while (retryTimes <= commitRetryTimes){
             try {
-                if(!taskDBFlag){
+                if(!submitDB){
                     // submit task to db
                     task = processDao.submitTask(taskInstance, processInstance);
                     if(task != null && task.getId() != 0){
-                        taskDBFlag = true;
+                        submitDB = true;
                     }
                 }
-                if(taskDBFlag && !taskQueueFlag){
+                if(submitDB && !submitQueue){
                     // submit task to queue
-                    taskQueueFlag = processDao.submitTaskToQueue(task);
+                    submitQueue = processDao.submitTaskToQueue(task);
                 }
-                if(taskDBFlag && taskQueueFlag){
+                if(submitDB && submitQueue){
                     return task;
                 }
-                if(!taskDBFlag){
+                if(!submitDB){
                     logger.error("task commit to db failed , task has already retry {} times, please check the database", retryTimes);
-                }else if(!taskQueueFlag){
+                }else if(!submitDB){
                     logger.error("task commit to queue failed , task has already retry {} times, please check the database", retryTimes);
-
                 }
                 Thread.sleep(commitRetryInterval);
             } catch (Exception e) {
@@ -145,6 +144,7 @@ public class MasterBaseTaskExecThread implements Callable<Boolean> {
             }
             retryTimes += 1;
         }
+        return task;
     }
 
     /**

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

@@ -74,6 +74,9 @@ public class MasterTaskExecThread extends MasterBaseTaskExecThread {
     public Boolean submitWaitComplete() {
         Boolean result = false;
         this.taskInstance = submit();
+        if(this.taskInstance == null){
+            return result;
+        }
         if(!this.taskInstance.getState().typeIsFinished()) {
             result = waitTaskQuit();
         }