diff --git a/runtime/websocket/bin/websocket-server.cpp b/runtime/websocket/bin/websocket-server.cpp
index 7f17d345d..ed25c951b 100644
--- a/runtime/websocket/bin/websocket-server.cpp
+++ b/runtime/websocket/bin/websocket-server.cpp
@@ -85,6 +85,7 @@ void WebSocketServer::do_decoder(const std::vector<char>& buffer,
           stamp_sents = FunASRGetStampSents(Result);
           FunASRFreeResult(Result);
         } else{
+          std::this_thread::sleep_for(std::chrono::milliseconds(20));
           LOG(ERROR) << "FUNASR_RESULT is nullptr.";
         }
       }catch (std::exception const& e) {