diff --git a/out_service/cd.py b/out_service/cd.py
index b7bc5bdd..61e1b299 100644
--- a/out_service/cd.py
+++ b/out_service/cd.py
@@ -75,46 +75,42 @@ class JSONRequestHandler(BaseHTTPRequestHandler):
             with sc_lock:  # 加锁，防止竞争
                 sc = sc_all[addr]
                 
-            try:
-                if sc is None:
-                    sc = socket.socket()
-                    sc.settimeout(5)
-                    sc.connect((host, int(port)))
-                    with sc_lock:  # 再次加锁，更新 sc_all
+                try:
+                    if sc is None:
+                        sc = socket.socket()
+                        sc.settimeout(5)
+                        sc.connect((host, int(port)))
                         sc_all[addr] = sc
-                
-                sc.settimeout(0.5)
-                while True:
-                    try:
-                        data = sc.recv(65536)
-                        if not data:
+                    sc.settimeout(0.5)
+                    while True:
+                        try:
+                            data = sc.recv(65536)
+                            if not data:
+                                break
+                        except (socket.timeout, BlockingIOError):
                             break
-                    except (socket.timeout, BlockingIOError):
-                        break
-                
-                sc.settimeout(5)
-                sc.sendall(b"R")
-                
-                data = bytearray()
-                while len(data) < 8:
-                    chunk = sc.recv(1024)
-                    if not chunk:
-                        raise ConnectionError("连接中断")
-                    data.extend(chunk)
-                
-                return sc, bytes(data)
-                
-            except Exception as e:
-                if sc is not None:
-                    try:
-                        sc.close()
-                    except Exception:
-                        pass
-                    with sc_lock:  # 加锁，清除无效连接
+                    
+                    sc.settimeout(5)
+                    sc.sendall(b"R")
+                    
+                    data = bytearray()
+                    while len(data) < 8:
+                        chunk = sc.recv(1024)
+                        if not chunk:
+                            raise ConnectionError("连接中断")
+                        data.extend(chunk)
+                    
+                    return sc, bytes(data)
+                    
+                except Exception as e:
+                    if sc is not None:
+                        try:
+                            sc.close()
+                        except Exception:
+                            pass
                         sc_all[addr] = None
-                self.error(f'采集器通信失败: {e}')
-                print(traceback.format_exc())
-                return None, None
+                    self.error(f'采集器通信失败: {e}')
+                    return None, None
 
         sc, resp = connect_and_send()
         if sc is None or resp is None: