Update cache_messager.py (#3173)

Author: ltd0924

fastdeploy/cache_manager/cache_messager.py

@@ -142,7 +142,7 @@ def __init__(
 
         self.gpu_id = gpu_id
         self.cache_info = dict()
-        self.dp_rank_id = local_data_parallel_id
+        self.dp_rank_id = self.rank + local_data_parallel_id * self.nranks
 
         layerwise_send_cache_thread = threading.Thread(target=self._prefill_layerwise_send_cache_thread)
         layerwise_send_cache_thread.daemon = True