エラー落ち軽減?

main.py

@@ -11,7 +11,7 @@ import random
 import subprocess
 from asyncio import Lock
 from datetime import date, datetime, time, timedelta
-from typing import Any, TypedDict, cast
+from typing import Any, Callable, TypedDict, cast
 
 import nicolib
 import queries_to_answers as q2a
@@ -292,24 +292,48 @@ async def reconnect_db (
 ) -> None:
     while True:
         await asyncio.sleep (600)
-        run_with_mysql_retry (DB.reconnect, 'mysql')
+        try:
+            ensure_mysql_alive ()
+        except Exception as ex:
+            if getattr (ex, 'args', [None])[0] in (2006, 2013):
+                safe_reconnect ()
+            else:
+                raise
 
 
-def ensure_mysql_alive ():
+def ensure_mysql_alive (
+) -> None:
     conn = DB.connection ('mysql').get_connection ()
-    conn.ping (True)
+    conn.ping ()
 
 
-def run_with_mysql_retry (fn, *args, **kwargs):
+def safe_reconnect (
+) -> None:
+    try:
+        DB.reconnect ('mysql')
+    except Exception as ex:
+        if getattr (ex, 'args', [None])[0] not in (2006, 2013):
+            raise
+
+
+def run_with_mysql_retry (
+        fn:         Callable[..., Any],
+        *args,
+        **kwargs,
+) -> Any:
+    last = None
+    for _ in range (2):
         try:
             ensure_mysql_alive ()
             return fn (*args, **kwargs)
         except Exception as ex:
+            last = ex
             if getattr (ex, 'args', [None])[0] in (2006, 2013):
-            DB.reconnect ('mysql')
-            ensure_mysql_alive ()
-            return fn (*args, **kwargs)
+                safe_reconnect ()
+                continue
             raise
+    if last:
+        raise last
 
 
 def _add_query (