Merge pull request #1618 from samz406/1227-2

before delete Udf check exist

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/UdfFuncService.java

@@ -187,6 +187,12 @@ public class UdfFuncService extends BaseService{
         // verify udfFunc is exist
         UdfFunc udf = udfFuncMapper.selectUdfById(udfFuncId);
 
+        if (udf == null) {
+            result.put(Constants.STATUS, Status.UDF_FUNCTION_NOT_EXIST);
+            result.put(Constants.MSG, Status.UDF_FUNCTION_NOT_EXIST.getMsg());
+            return result;
+        }
+
         // if resource upload startup
         if (!PropertyUtils.getResUploadStartupState()){
             logger.error("resource upload startup state: {}", PropertyUtils.getResUploadStartupState());
@@ -194,12 +200,6 @@ public class UdfFuncService extends BaseService{
             return result;
         }
 
-        if (udf == null) {
-            result.put(Constants.STATUS, Status.UDF_FUNCTION_NOT_EXIST);
-            result.put(Constants.MSG, Status.UDF_FUNCTION_NOT_EXIST.getMsg());
-            return result;
-        }
-
         // verify udfFuncName is exist
         if (!funcName.equals(udf.getFuncName())) {
             if (checkUdfFuncNameExists(funcName)) {