Fix: duplicated task (#8358)

### What problem does this PR solve?


### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

rag/svr/task_executor.py

@@ -707,33 +707,6 @@ async def report_status():
         await trio.sleep(30)
         
         
-def recover_pending_tasks():
-    redis_lock = RedisDistributedLock("recover_pending_tasks", lock_value=CONSUMER_NAME, timeout=60)
-    svr_queue_names = get_svr_queue_names()
-    while not stop_event.is_set():
-        try:
-            if redis_lock.acquire():
-                for queue_name in svr_queue_names:
-                    msgs = REDIS_CONN.get_pending_msg(queue=queue_name, group_name=SVR_CONSUMER_GROUP_NAME)
-                    msgs = [msg for msg in msgs if msg['consumer'] != CONSUMER_NAME]
-                    if len(msgs) == 0:
-                        continue
-
-                    task_executors = REDIS_CONN.smembers("TASKEXE")
-                    task_executor_set = {t for t in task_executors}
-                    msgs = [msg for msg in msgs if msg['consumer'] not in task_executor_set]
-                    for msg in msgs:
-                        logging.info(
-                            f"Recover pending task: {msg['message_id']}, consumer: {msg['consumer']}, "
-                            f"time since delivered: {msg['time_since_delivered'] / 1000} s"
-                        )
-                        REDIS_CONN.requeue_msg(queue_name, SVR_CONSUMER_GROUP_NAME, msg['message_id'])
-        except Exception:
-            logging.warning("recover_pending_tasks got exception")
-        finally:
-            redis_lock.release()
-            stop_event.wait(60)
-        
 async def task_manager():
     try:
         await handle_task()
@@ -762,8 +735,6 @@ async def main():
     signal.signal(signal.SIGINT, signal_handler)
     signal.signal(signal.SIGTERM, signal_handler)
 
-    threading.Thread(name="RecoverPendingTask", target=recover_pending_tasks).start()
-
     async with trio.open_nursery() as nursery:
         nursery.start_soon(report_status)
         while not stop_event.is_set():