Technoboy- commented on a change in pull request #3746:
URL: 
https://github.com/apache/incubator-dolphinscheduler/pull/3746#discussion_r489159845



##########
File path: 
dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/TaskParametersUtils.java
##########
@@ -55,41 +55,42 @@ private TaskParametersUtils() {
      * @return task parameters
      */
     public static AbstractParameters getParameters(String taskType, String 
parameter) {
-        try {
-            switch (EnumUtils.getEnum(TaskType.class, taskType)) {
-                case SUB_PROCESS:
-                    return JSONUtils.parseObject(parameter, 
SubProcessParameters.class);
-                case SHELL:
-                case WATERDROP:
-                    return JSONUtils.parseObject(parameter, 
ShellParameters.class);
-                case PROCEDURE:
-                    return JSONUtils.parseObject(parameter, 
ProcedureParameters.class);
-                case SQL:
-                    return JSONUtils.parseObject(parameter, 
SqlParameters.class);
-                case MR:
-                    return JSONUtils.parseObject(parameter, 
MapreduceParameters.class);
-                case SPARK:
-                    return JSONUtils.parseObject(parameter, 
SparkParameters.class);
-                case PYTHON:
-                    return JSONUtils.parseObject(parameter, 
PythonParameters.class);
-                case DEPENDENT:
-                    return JSONUtils.parseObject(parameter, 
DependentParameters.class);
-                case FLINK:
-                    return JSONUtils.parseObject(parameter, 
FlinkParameters.class);
-                case HTTP:
-                    return JSONUtils.parseObject(parameter, 
HttpParameters.class);
-                case DATAX:
-                    return JSONUtils.parseObject(parameter, 
DataxParameters.class);
-                case CONDITIONS:
-                    return JSONUtils.parseObject(parameter, 
ConditionsParameters.class);
-                case SQOOP:
-                    return JSONUtils.parseObject(parameter, 
SqoopParameters.class);
-                default:
-                    return null;
-            }
-        } catch (Exception e) {
-            logger.error(e.getMessage(), e);
+        TaskType anEnum = EnumUtils.getEnum(TaskType.class, taskType);
+        if (anEnum == null) {
+            logger.error("not support task type: {}", taskType);
+            return null;

Review comment:
       Why not throw InvalidArgumentException?




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