[fix] Add the function for judging the event loop switch

api/app/aioRedis.py

@@ -33,20 +33,24 @@ _thread_local = threading.local()
 
 
 def get_thread_safe_redis() -> redis.StrictRedis:
-    """Get a Redis client safe for the current execution context.
-    
-    Uses thread-local storage with PID checking to ensure:
-    - Each thread gets its own ConnectionPool (Celery --pool=threads)
-    - Pools are recreated after fork (Celery --pool=prefork)
-    - health_check_interval prevents stale connection errors
-    
-    Returns:
-        redis.StrictRedis: A Redis client with a thread/process-local pool.
+    """Return a Redis client whose connection pool is bound to the current
+    thread, process **and** event loop.
+
+    The pool is recreated when:
+    - The PID changes (fork, Celery --pool=prefork)
+    - The thread has no pool yet (Celery --pool=threads)
+    - The previously-cached event loop has been closed (Celery tasks call
+      ``_shutdown_loop_gracefully`` which closes the loop after each run)
     """
     current_pid = os.getpid()
+    cached_loop = getattr(_thread_local, "loop", None)
+    loop_stale = cached_loop is not None and cached_loop.is_closed()
 
-    if not hasattr(_thread_local, "pool") or getattr(_thread_local, "pid", None) != current_pid:
+    if not hasattr(_thread_local, "pool") \
+            or getattr(_thread_local, "pid", None) != current_pid \
+            or loop_stale:
         _thread_local.pid = current_pid
+        _thread_local.loop = asyncio.get_event_loop()
         _thread_local.pool = ConnectionPool.from_url(
             _REDIS_URL,
             db=settings.REDIS_DB,