diff --git a/powerjob-server/powerjob-server-core/src/main/java/tech/powerjob/server/core/instance/InstanceService.java b/powerjob-server/powerjob-server-core/src/main/java/tech/powerjob/server/core/instance/InstanceService.java
index 53071a6d..29a0cfc2 100644
--- a/powerjob-server/powerjob-server-core/src/main/java/tech/powerjob/server/core/instance/InstanceService.java
+++ b/powerjob-server/powerjob-server-core/src/main/java/tech/powerjob/server/core/instance/InstanceService.java
@@ -260,10 +260,12 @@ public class InstanceService {
     /**
      * 获取任务实例的详细运行详细
      *
+     * @param appId 用于远程 server 路由，勿删！
      * @param instanceId 任务实例ID
      * @return 详细运行状态
      */
-    public InstanceDetail getInstanceDetail(Long instanceId) {
+    @DesignateServer
+    public InstanceDetail getInstanceDetail(Long appId, Long instanceId) {
 
         InstanceInfoDO instanceInfoDO = fetchInstanceInfo(instanceId);
 
diff --git a/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/InstanceController.java b/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/InstanceController.java
index d2f729c2..008d05e7 100644
--- a/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/InstanceController.java
+++ b/powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/InstanceController.java
@@ -6,7 +6,6 @@ import tech.powerjob.server.common.utils.OmsFileUtils;
 import tech.powerjob.server.persistence.PageResult;
 import tech.powerjob.server.persistence.StringPage;
 import tech.powerjob.server.persistence.remote.model.InstanceInfoDO;
-import tech.powerjob.server.persistence.remote.repository.AppInfoRepository;
 import tech.powerjob.server.persistence.remote.repository.InstanceInfoRepository;
 import tech.powerjob.server.core.service.CacheService;
 import tech.powerjob.server.core.instance.InstanceLogService;
@@ -69,8 +68,14 @@ public class InstanceController {
     }
 
     @GetMapping("/detail")
-    public ResultDTO<InstanceDetailVO> getInstanceDetail(Long instanceId) {
-        return ResultDTO.success(InstanceDetailVO.from(instanceService.getInstanceDetail(instanceId)));
+    public ResultDTO<InstanceDetailVO> getInstanceDetail(Long appId, Long instanceId) {
+
+        // 兼容老版本前端不存在 appId 的场景
+        if (appId == null) {
+            appId = instanceService.getInstanceInfo(instanceId).getAppId();
+        }
+
+        return ResultDTO.success(InstanceDetailVO.from(instanceService.getInstanceDetail(appId, instanceId)));
     }
 
     @GetMapping("/log")
diff --git a/powerjob-worker-samples/src/main/java/tech/powerjob/samples/processors/MapReduceProcessorDemo.java b/powerjob-worker-samples/src/main/java/tech/powerjob/samples/processors/MapReduceProcessorDemo.java
index 2b77c370..2f69fd4b 100644
--- a/powerjob-worker-samples/src/main/java/tech/powerjob/samples/processors/MapReduceProcessorDemo.java
+++ b/powerjob-worker-samples/src/main/java/tech/powerjob/samples/processors/MapReduceProcessorDemo.java
@@ -2,6 +2,7 @@ package tech.powerjob.samples.processors;
 
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
+import lombok.*;
 import tech.powerjob.common.serialize.JsonUtils;
 import tech.powerjob.worker.core.processor.ProcessResult;
 import tech.powerjob.worker.core.processor.TaskContext;
@@ -9,10 +10,6 @@ import tech.powerjob.worker.core.processor.TaskResult;
 import tech.powerjob.worker.core.processor.sdk.MapReduceProcessor;
 import tech.powerjob.worker.log.OmsLogger;
 import com.google.common.collect.Lists;
-import lombok.AllArgsConstructor;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.ToString;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Component;
 
@@ -85,10 +82,18 @@ public class MapReduceProcessorDemo implements MapReduceProcessor {
     }
 
     @Getter
+    @Setter
     @ToString
-    @NoArgsConstructor
     @AllArgsConstructor
     public static class TestSubTask {
+
+        /**
+         * 注意：代表子任务参数的类：一定要有无参构造方法！一定要有无参构造方法！一定要有无参构造方法！
+         * 最好把 GET / SET 方法也加上，减少序列化问题的概率
+         */
+        public TestSubTask() {
+        }
+
         private String name;
         private int age;
     }