diff --git a/detection/src/main/java/com/njcn/gather/detection/controller/PreDetectionController.java b/detection/src/main/java/com/njcn/gather/detection/controller/PreDetectionController.java
index 49f0433f..984f52e1 100644
--- a/detection/src/main/java/com/njcn/gather/detection/controller/PreDetectionController.java
+++ b/detection/src/main/java/com/njcn/gather/detection/controller/PreDetectionController.java
@@ -106,12 +106,24 @@ public class PreDetectionController extends BaseController {
     @ApiImplicitParam(name = "param", value = "查询参数", required = true)
     public HttpResult<?> startTestSimulate(@RequestBody @Validated SimulateDetectionParam param) {
         String methodDescribe = getMethodDescribe("startTestSimulate");
-        HttpResult<DetectionLockHolderVO> busy = requireHolderSelf();
+        // ContrastDetectionParam 无 userPageId 字段，用 loginName 作为会话标识（与 WS 会话 key 一致）
+        HttpResult<DetectionLockHolderVO> busy = tryAcquireLock(param.getUserPageId());
         if (busy != null) {
             return busy;
         }
-        preDetectionService.sendScript(param);
-        return HttpResultUtil.assembleCommonResponseResult(CommonResponseEnum.SUCCESS, null, methodDescribe);
+        // 同步阶段抛异常时回滚锁，理由同 startPreTest
+        boolean keepLock = false;
+        try {
+            FormalTestManager.stopTime = 0;
+            FormalTestManager.hasStopFlag = false;
+            preDetectionService.sendScript(param);
+            keepLock = true;
+            return HttpResultUtil.assembleCommonResponseResult(CommonResponseEnum.SUCCESS, null, methodDescribe);
+        } finally {
+            if (!keepLock) {
+                releaseLockSelf("START_CONTRAST_SYNC_FAILED");
+            }
+        }
     }
 
     /**
diff --git a/detection/src/main/java/com/njcn/gather/detection/handler/SocketSourceResponseService.java b/detection/src/main/java/com/njcn/gather/detection/handler/SocketSourceResponseService.java
index 5ad50968..14560d7b 100644
--- a/detection/src/main/java/com/njcn/gather/detection/handler/SocketSourceResponseService.java
+++ b/detection/src/main/java/com/njcn/gather/detection/handler/SocketSourceResponseService.java
@@ -121,6 +121,15 @@ public class SocketSourceResponseService {
         sendErrorAndQuit(param, socketDataMsg, errorCode.getMessage());
     }
 
+    private void sendSimulateInitFailure(PreDetectionParam param, String errorMessage) {
+        SocketDataMsg socketDataMsg = new SocketDataMsg();
+        socketDataMsg.setRequestId(SourceOperateCodeEnum.YJC_YTXJY.getValue());
+        socketDataMsg.setOperateCode(SourceOperateCodeEnum.INIT_GATHER.getValue());
+        socketDataMsg.setCode(SourceResponseCodeEnum.UNKNOWN_ERROR.getCode());
+        socketDataMsg.setData(errorMessage);
+        sendWebSocketMessage(param.getUserPageId(), socketDataMsg);
+    }
+
 
     /**
      * 当前检测会话中的设备列表
@@ -214,12 +223,12 @@ public class SocketSourceResponseService {
                     break;
 
                 default:
-                    // TODO: 记录未知操作码到日志，并向前端发送友好提示
+                    sendSimulateInitFailure(param, "未知操作码");
                     break;
             }
         } else {
-            // TODO: 向前端发送错误提示
             log.error("程控源响应消息操作码解析失败，原始消息: {}, 解析结果: {}", msg, enumByCode);
+            sendSimulateInitFailure(param, "未知操作码");
         }
     }
 
@@ -272,10 +281,11 @@ public class SocketSourceResponseService {
                     sendWebSocketMessage(param.getUserPageId(), socketDataMsg);
                     break;
                 default:
-                    // 未识别的响应码：发送通用错误消息
-                    WebServiceManager.sendUnknownErrorMessage(param.getUserPageId());
+                    sendSimulateInitFailure(param, "未知状态码");
                     break;
             }
+        } else {
+            sendSimulateInitFailure(param, "未知状态码");
         }
     }
 
diff --git a/detection/src/main/java/com/njcn/gather/detection/service/impl/PreDetectionServiceImpl.java b/detection/src/main/java/com/njcn/gather/detection/service/impl/PreDetectionServiceImpl.java
index a48a0681..62455757 100644
--- a/detection/src/main/java/com/njcn/gather/detection/service/impl/PreDetectionServiceImpl.java
+++ b/detection/src/main/java/com/njcn/gather/detection/service/impl/PreDetectionServiceImpl.java
@@ -223,6 +223,7 @@ public class PreDetectionServiceImpl implements PreDetectionService {
     private void sendYtxSocketSimulate(PreDetectionParam param) {
         SourceInitialize sourceParam = pqSourceService.getSourceInitializeParam(param.getSourceId());
         param.setSourceId(sourceParam.getSourceId());
+        param.setSourceName(sourceParam.getSourceId());
         String loginName = RequestUtil.getLoginNameByToken();
         WebServiceManager.addPreDetectionParam(loginName, param);
         if (ObjectUtil.isNotNull(sourceParam)) {
diff --git a/detection/src/main/java/com/njcn/gather/detection/util/socket/cilent/NettySourceClientHandler.java b/detection/src/main/java/com/njcn/gather/detection/util/socket/cilent/NettySourceClientHandler.java
index 66479aea..27601d50 100644
--- a/detection/src/main/java/com/njcn/gather/detection/util/socket/cilent/NettySourceClientHandler.java
+++ b/detection/src/main/java/com/njcn/gather/detection/util/socket/cilent/NettySourceClientHandler.java
@@ -90,7 +90,7 @@ public class NettySourceClientHandler extends SimpleChannelInboundHandler<String
         }
         
         String userId = webUser.getUserPageId();
-        log.debug("源设备接收服务端数据, userId: {}, message: {}", userId, msg);
+        log.info("source接收server端数据, userId: {}, message: {}", userId, msg);
         
         try {
             // 委托给专门的响应处理服务处理业务逻辑