更新ios

app.py

@@ -8566,13 +8566,11 @@ def get_stock_quotes():
         return jsonify({'success': False, 'error': str(e)}), 500
 
 
-# ==================== ClickHouse 连接池（带健康检查） ====================
-_clickhouse_client = None
-_clickhouse_client_lock = threading.Lock()
+# ==================== ClickHouse 连接管理（每次请求新建连接，更稳定） ====================
 
 def _create_clickhouse_client():
-    """创建新的 ClickHouse 客户端连接，并验证连接有效"""
-    client = Cclient(
+    """创建新的 ClickHouse 客户端连接"""
+    return Cclient(
         host='127.0.0.1',
         port=9000,
         user='default',
@@ -8583,52 +8581,52 @@ def _create_clickhouse_client():
             'send_receive_timeout': 300,
         }
     )
-    # 立即验证连接，确保 socket 已建立
-    try:
-        client.execute("SELECT 1")
-    except Exception as e:
-        print(f"[ClickHouse] 创建连接后验证失败: {e}")
-        raise
-    return client
 
 def get_clickhouse_client():
-    """获取 ClickHouse 客户端（带健康检查和自动重连）"""
-    global _clickhouse_client
+    """
+    获取 ClickHouse 客户端（每次创建新连接）
 
-    with _clickhouse_client_lock:
-        # 如果客户端不存在，创建新连接
-        if _clickhouse_client is None:
-            try:
-                _clickhouse_client = _create_clickhouse_client()
-                print("[ClickHouse] 创建新连接成功")
-                return _clickhouse_client
-            except Exception as e:
-                print(f"[ClickHouse] 创建连接失败: {e}")
-                _clickhouse_client = None
-                raise
+    注意：调用方应在使用完毕后调用 client.disconnect() 释放连接，
+    或使用 execute_clickhouse_query() 辅助函数自动管理连接
+    """
+    return _create_clickhouse_client()
 
-        # 健康检查：尝试执行简单查询
+def execute_clickhouse_query(query, params=None, max_retries=2):
+    """
+    执行 ClickHouse 查询（带自动重试和连接管理）
+
+    Args:
+        query: SQL 查询语句
+        params: 查询参数字典
+        max_retries: 最大重试次数
+
+    Returns:
+        查询结果列表
+    """
+    last_error = None
+
+    for attempt in range(max_retries + 1):
+        client = None
         try:
-            _clickhouse_client.execute("SELECT 1")
-            return _clickhouse_client
+            client = _create_clickhouse_client()
+            result = client.execute(query, params) if params else client.execute(query)
+            return result
         except Exception as e:
-            print(f"[ClickHouse] 连接失效，正在重连: {e}")
-            # 安全断开旧连接
+            last_error = e
+            if attempt < max_retries:
+                print(f"[ClickHouse] 查询失败 (尝试 {attempt + 1}/{max_retries + 1}): {e}")
+                import time
+                time.sleep(0.5)  # 短暂等待后重试
+            else:
+                print(f"[ClickHouse] 查询最终失败: {e}")
+        finally:
+            if client:
                 try:
-                _clickhouse_client.disconnect()
+                    client.disconnect()
                 except Exception:
                     pass
-            _clickhouse_client = None
 
-            # 重新创建连接
-            try:
-                _clickhouse_client = _create_clickhouse_client()
-                print("[ClickHouse] 重连成功")
-                return _clickhouse_client
-            except Exception as reconnect_error:
-                print(f"[ClickHouse] 重连失败: {reconnect_error}")
-                _clickhouse_client = None
-                raise
+    raise last_error
 
 
 # ==================== 高频五档数据 ClickHouse HTTP 客户端（222.128.1.157:18123） ====================