diff --git a/plugins/restful/rest.c b/plugins/restful/rest.c
index 40c87056..2cbe3d2e 100644
--- a/plugins/restful/rest.c
+++ b/plugins/restful/rest.c
@@ -196,6 +196,8 @@ static int dashb_plugin_close(neu_plugin_t *plugin)
 {
     int rv = 0;
 
+    nlog_info("Success to before free plugin: %s",
+              neu_plugin_module.module_name);
     nng_http_server_stop(plugin->api_server);
     nng_http_server_release(plugin->api_server);
     nng_http_server_stop(plugin->web_server);
diff --git a/src/connection/connection.c b/src/connection/connection.c
index cf786a82..08eb5369 100644
--- a/src/connection/connection.c
+++ b/src/connection/connection.c
@@ -776,6 +776,8 @@ void neu_conn_stream_consume(neu_conn_t *conn, void *context,
         while (neu_protocol_unpack_buf_unused_size(&protocol_buf) > 0) {
             int used = fn(context, &protocol_buf);
 
+            zlog_debug(conn->param.log, "buf used: %d offset: %d", used,
+                       offset);
             if (used == 0) {
                 break;
             } else if (used == -1) {