fix close conn behavior

Author: blink1073

pymongo/asynchronous/pool.py

@@ -594,7 +594,9 @@ def validate_session(
 
     async def close_conn(self, reason: Optional[str]) -> None:
         """Close this connection with a reason."""
-        await super().close_conn(reason)
+        if self.closed:
+            return
+        await self._close_conn()
         if reason:
             if self.enabled_for_cmap:
                 assert self.listeners is not None

pymongo/synchronous/pool.py

@@ -592,7 +592,9 @@ def validate_session(
 
     def close_conn(self, reason: Optional[str]) -> None:
         """Close this connection with a reason."""
-        super().close_conn(reason)
+        if self.closed:
+            return
+        self._close_conn()
         if reason:
             if self.enabled_for_cmap:
                 assert self.listeners is not None