diff --git a/third_party/vllm/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py b/third_party/vllm/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py
index 7f234bc..a7abde2 100644
--- a/third_party/vllm/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py
+++ b/third_party/vllm/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py
@@ -422,6 +422,12 @@ class MooncakeConnectorScheduler:
                     get_block_hash(k).hex() for k in removed_keys
                 }
                 self._known_hash_keys = current_keys.copy()
+                logger.info("hash_table_sync: +%d -%d (total known=%d)",
+                            len(new_keys), len(removed_keys), len(self._known_hash_keys))
+        else:
+            if not hasattr(self, '_bp_warned'):
+                logger.warning("_block_pool is None, hash table sync disabled")
+                self._bp_warned = True
 
         if not self.is_kv_consumer:
             for req_id, (req, block_ids) in self._reqs_need_send.items():