diff --git a/internal/proxy/impl.go b/internal/proxy/impl.go
index 986cf16e16374cf79170aaab5e3c52eadad309bb..aed035ead8abca1bb42928a58cd87ef7d6dfa117 100644
--- a/internal/proxy/impl.go
+++ b/internal/proxy/impl.go
@@ -80,6 +80,7 @@ func (node *Proxy) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringRe
 	}, nil
 }
 
+// InvalidateCollectionMetaCache invalidate the meta cache of specific collection.
 func (node *Proxy) InvalidateCollectionMetaCache(ctx context.Context, request *proxypb.InvalidateCollMetaCacheRequest) (*commonpb.Status, error) {
 	log.Debug("InvalidateCollectionMetaCache",
 		zap.String("role", Params.RoleName),