diff --git a/snail-job-client/snail-job-client-job-core/src/main/java/com/aizuda/snailjob/client/job/core/client/JobEndPoint.java b/snail-job-client/snail-job-client-job-core/src/main/java/com/aizuda/snailjob/client/job/core/client/JobEndPoint.java
index 8a80e5e34..dcd6e793d 100644
--- a/snail-job-client/snail-job-client-job-core/src/main/java/com/aizuda/snailjob/client/job/core/client/JobEndPoint.java
+++ b/snail-job-client/snail-job-client-job-core/src/main/java/com/aizuda/snailjob/client/job/core/client/JobEndPoint.java
@@ -126,13 +126,6 @@ public class JobEndPoint {
     @Mapping(path = JOB_STOP, method = RequestMethod.POST)
     public Result<Boolean> stopJob(@Valid StopJobDTO interruptJob) {
 
-        ValidatorFactory vf = Validation.buildDefaultValidatorFactory();
-        Validator validator = vf.getValidator();
-        Set<ConstraintViolation<StopJobDTO>> set = validator.validate(interruptJob);
-        for (final ConstraintViolation<StopJobDTO> violation : set) {
-            return new Result<>(violation.getMessage(), Boolean.FALSE);
-        }
-
         ThreadPoolExecutor threadPool = ThreadPoolCache.getThreadPool(interruptJob.getTaskBatchId());
         if (Objects.isNull(threadPool) || threadPool.isShutdown() || threadPool.isTerminated()) {
             return new Result<>(Boolean.TRUE);
diff --git a/snail-job-client/snail-job-client-job-core/src/main/java/com/aizuda/snailjob/client/job/core/executor/AbstractMapExecutor.java b/snail-job-client/snail-job-client-job-core/src/main/java/com/aizuda/snailjob/client/job/core/executor/AbstractMapExecutor.java
index 1f6b9dae3..2ba2dc634 100644
--- a/snail-job-client/snail-job-client-job-core/src/main/java/com/aizuda/snailjob/client/job/core/executor/AbstractMapExecutor.java
+++ b/snail-job-client/snail-job-client-job-core/src/main/java/com/aizuda/snailjob/client/job/core/executor/AbstractMapExecutor.java
@@ -8,6 +8,7 @@ import com.aizuda.snailjob.client.job.core.dto.JobArgs;
 import com.aizuda.snailjob.client.job.core.dto.MapReduceArgs;
 import com.aizuda.snailjob.client.model.ExecuteResult;
 import com.aizuda.snailjob.client.model.request.MapTaskRequest;
+import com.aizuda.snailjob.common.core.constant.SystemConstants;
 import com.aizuda.snailjob.common.core.exception.SnailJobMapReduceException;
 import com.aizuda.snailjob.common.core.model.JobContext;
 import com.aizuda.snailjob.common.core.model.MapContext;
@@ -46,8 +47,8 @@ public abstract class AbstractMapExecutor extends AbstractJobExecutor implements
         }
 
         // mapName 任务命名和根任务名或者最终任务名称一致导致的问题（无限生成子任务或者直接失败）
-        if ("ROOT_TASK".equals(nextMapName)) {
-            throw new SnailJobMapReduceException("NextMapName can not be ROOT_TASK");
+        if (SystemConstants.MAP_ROOT.equals(nextMapName)) {
+            throw new SnailJobMapReduceException("The Next mapName can not be {}", SystemConstants.MAP_ROOT);
         }
 
         JobContext jobContext = JobContextManager.getJobContext();
diff --git a/snail-job-common/snail-job-common-core/src/main/java/com/aizuda/snailjob/common/core/constant/SystemConstants.java b/snail-job-common/snail-job-common-core/src/main/java/com/aizuda/snailjob/common/core/constant/SystemConstants.java
index e446648a5..be04790f1 100644
--- a/snail-job-common/snail-job-common-core/src/main/java/com/aizuda/snailjob/common/core/constant/SystemConstants.java
+++ b/snail-job-common/snail-job-common-core/src/main/java/com/aizuda/snailjob/common/core/constant/SystemConstants.java
@@ -192,4 +192,9 @@ public interface SystemConstants {
      * 组名、场景名、空间ID通用正则
      */
     String REGEXP = "^[A-Za-z0-9_-]{1,64}$";
+
+    /**
+     * 动态分片的root节点
+     */
+    String MAP_ROOT = "MAP_ROOT";
 }
diff --git a/snail-job-server/snail-job-server-job-task/src/main/java/com/aizuda/snailjob/server/job/task/support/dispatch/JobExecutorActor.java b/snail-job-server/snail-job-server-job-task/src/main/java/com/aizuda/snailjob/server/job/task/support/dispatch/JobExecutorActor.java
index 96fcb93e8..bfbab20e2 100644
--- a/snail-job-server/snail-job-server-job-task/src/main/java/com/aizuda/snailjob/server/job/task/support/dispatch/JobExecutorActor.java
+++ b/snail-job-server/snail-job-server-job-task/src/main/java/com/aizuda/snailjob/server/job/task/support/dispatch/JobExecutorActor.java
@@ -4,6 +4,7 @@ import akka.actor.AbstractActor;
 import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.lang.Assert;
 import cn.hutool.core.util.StrUtil;
+import com.aizuda.snailjob.common.core.constant.SystemConstants;
 import com.aizuda.snailjob.common.core.context.SpringContext;
 import com.aizuda.snailjob.common.core.enums.JobOperationReasonEnum;
 import com.aizuda.snailjob.common.core.enums.JobTaskBatchStatusEnum;
@@ -134,12 +135,13 @@ public class JobExecutorActor extends AbstractActor {
             JobTaskGenerator taskInstance = JobTaskGeneratorFactory.getTaskInstance(job.getTaskType());
             JobTaskGenerateContext instanceGenerateContext = JobTaskConverter.INSTANCE.toJobTaskInstanceGenerateContext(job);
             instanceGenerateContext.setTaskBatchId(taskExecute.getTaskBatchId());
-            instanceGenerateContext.setMapName("ROOT_TASK");
+            instanceGenerateContext.setMapName(SystemConstants.MAP_ROOT);
             instanceGenerateContext.setMapSubTask(Lists.newArrayList(StrUtil.EMPTY));
             // TODO 此处需要判断任务类型
             instanceGenerateContext.setMrStage(MapReduceStageEnum.MAP);
             List<JobTask> taskList = taskInstance.generate(instanceGenerateContext);
             if (CollUtil.isEmpty(taskList)) {
+                SnailJobLog.LOCAL.warn("Generate job task is empty, taskBatchId:[{}]", taskExecute.getTaskBatchId());
                 return;
             }
 
@@ -179,7 +181,7 @@ public class JobExecutorActor extends AbstractActor {
         context.setJobId(job.getId());
         context.setWorkflowTaskBatchId(taskExecute.getWorkflowTaskBatchId());
         context.setWorkflowNodeId(taskExecute.getWorkflowNodeId());
-        context.setMapName("ROOT_TASK");
+        context.setMapName(SystemConstants.MAP_ROOT);
         return context;
     }
 
diff --git a/snail-job-server/snail-job-server-job-task/src/main/java/com/aizuda/snailjob/server/job/task/support/generator/task/MapReduceTaskGenerator.java b/snail-job-server/snail-job-server-job-task/src/main/java/com/aizuda/snailjob/server/job/task/support/generator/task/MapReduceTaskGenerator.java
index 52254fd10..974419e34 100644
--- a/snail-job-server/snail-job-server-job-task/src/main/java/com/aizuda/snailjob/server/job/task/support/generator/task/MapReduceTaskGenerator.java
+++ b/snail-job-server/snail-job-server-job-task/src/main/java/com/aizuda/snailjob/server/job/task/support/generator/task/MapReduceTaskGenerator.java
@@ -114,6 +114,7 @@ public class MapReduceTaskGenerator extends AbstractJobTaskGenerator {
         final List<RegisterNodeInfo> nodeInfoList, final Set<RegisterNodeInfo> serverNodes) {
         List<?> mapSubTask = context.getMapSubTask();
         if (CollUtil.isEmpty(mapSubTask)) {
+            SnailJobLog.LOCAL.warn("Map sub task is empty. TaskBatchId:[{}]", context.getTaskBatchId());
             return Lists.newArrayList();
         }
 
@@ -138,6 +139,6 @@ public class MapReduceTaskGenerator extends AbstractJobTaskGenerator {
             jobTasks.add(jobTask);
         }
 
-        return Lists.newArrayList();
+        return jobTasks;
     }
 }