[fix-3745][server] server get tasktype NPE exception (#3746)

dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/utils/TaskParametersUtils.java

@@ -55,8 +55,12 @@ public class TaskParametersUtils {
      * @return task parameters
      */
     public static AbstractParameters getParameters(String taskType, String parameter) {
-        try {
-            switch (EnumUtils.getEnum(TaskType.class, taskType)) {
+        TaskType anEnum = EnumUtils.getEnum(TaskType.class, taskType);
+        if (anEnum == null) {
+            logger.error("not support task type: {}", taskType);
+            return null;
+        }
+        switch (anEnum) {
             case SUB_PROCESS:
                 return JSONUtils.parseObject(parameter, SubProcessParameters.class);
             case SHELL:
@@ -87,9 +91,6 @@ public class TaskParametersUtils {
             default:
                 return null;
         }
-        } catch (Exception e) {
-            logger.error(e.getMessage(), e);
-        }
-        return null;
+
     }
 }

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/task/TaskManager.java

@@ -30,7 +30,6 @@ import org.apache.dolphinscheduler.server.worker.task.shell.ShellTask;
 import org.apache.dolphinscheduler.server.worker.task.spark.SparkTask;
 import org.apache.dolphinscheduler.server.worker.task.sql.SqlTask;
 import org.apache.dolphinscheduler.server.worker.task.sqoop.SqoopTask;
-
 import org.slf4j.Logger;
 
 /**
@@ -46,7 +45,12 @@ public class TaskManager {
      * @throws IllegalArgumentException illegal argument exception
      */
     public static AbstractTask newTask(TaskExecutionContext taskExecutionContext, Logger logger) throws IllegalArgumentException {
-        switch (EnumUtils.getEnum(TaskType.class,taskExecutionContext.getTaskType())) {
+        TaskType anEnum = EnumUtils.getEnum(TaskType.class, taskExecutionContext.getTaskType());
+        if (anEnum == null) {
+            logger.error("not support task type: {}", taskExecutionContext.getTaskType());
+            throw new IllegalArgumentException("not support task type");
+        }
+        switch (anEnum) {
             case SHELL:
             case WATERDROP:
                 return new ShellTask(taskExecutionContext, logger);
@@ -69,7 +73,7 @@ public class TaskManager {
             case SQOOP:
                 return new SqoopTask(taskExecutionContext, logger);
             default:
-                logger.error("unsupport task type: {}", taskExecutionContext.getTaskType());
+                logger.error("not support task type: {}", taskExecutionContext.getTaskType());
                 throw new IllegalArgumentException("not support task type");
         }
     }

dolphinscheduler-server/src/test/java/org/apache/dolphinscheduler/server/worker/task/TaskManagerTest.java

@@ -38,6 +38,8 @@ import org.slf4j.LoggerFactory;
 @PrepareForTest({SpringApplicationContext.class})
 public class TaskManagerTest {
 
+    private static Logger logger = LoggerFactory.getLogger(TaskManagerTest.class);
+
     private TaskExecutionContext taskExecutionContext;
 
     private Logger taskLogger;
@@ -95,9 +97,18 @@ public class TaskManagerTest {
         Assert.assertNotNull(TaskManager.newTask(taskExecutionContext,taskLogger));
         taskExecutionContext.setTaskType("SQOOP");
         Assert.assertNotNull(TaskManager.newTask(taskExecutionContext,taskLogger));
-        //taskExecutionContext.setTaskType(null);
-        //Assert.assertNull(TaskManager.newTask(taskExecutionContext,taskLogger));
-        //taskExecutionContext.setTaskType("XXX");
-        //Assert.assertNotNull(TaskManager.newTask(taskExecutionContext,taskLogger));
+
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testNewTaskIsNull() {
+        taskExecutionContext.setTaskType(null);
+        TaskManager.newTask(taskExecutionContext,taskLogger);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testNewTaskIsNotExists() {
+        taskExecutionContext.setTaskType("XXX");
+        TaskManager.newTask(taskExecutionContext,taskLogger);
     }
 }