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apps/etl/connectors/feiqiu/database/connection.py

@@ -1,9 +1,15 @@
 # -*- coding: utf-8 -*-
 """数据库连接管理器（限制最大连接超时时间）。"""
 
+import time
+
 import psycopg2
 import psycopg2.extras
 
+# 连接重试参数：应对 PostgreSQL 瞬时不可用
+_CONNECT_MAX_RETRIES = 3
+_CONNECT_RETRY_DELAY = 1.0
+
 
 class DatabaseConnection:
     """封装 psycopg2 连接，支持会话参数和超时保护。"""
@@ -24,11 +30,25 @@ class DatabaseConnection:
         # assumptions: libpq 默认使用系统 locale 的 client_encoding，Windows 中文系统为 GBK/CP936
         # 边界: 显式指定 client_encoding=utf8 确保连接层始终使用 UTF-8，与数据库 server_encoding 一致
         # 验证: web-admin 手动触发 ETL 全量 flow，不再出现 0xd6 解码错误
-        conn = psycopg2.connect(
-            self._dsn,
-            connect_timeout=timeout_val,
-            options="-c client_encoding=utf8",
-        )
+        last_exc = None
+        for attempt in range(_CONNECT_MAX_RETRIES):
+            try:
+                conn = psycopg2.connect(
+                    self._dsn,
+                    connect_timeout=timeout_val,
+                    options="-c client_encoding=utf8",
+                    keepalives=1,
+                    keepalives_idle=60,
+                    keepalives_interval=10,
+                    keepalives_count=3,
+                )
+                break
+            except psycopg2.OperationalError as e:
+                last_exc = e
+                if attempt < _CONNECT_MAX_RETRIES - 1:
+                    time.sleep(_CONNECT_RETRY_DELAY * (attempt + 1))
+        else:
+            raise last_exc
         conn.autocommit = False
 
         # 会话参数（时区、语句超时等）