diff --git a/plugins/restful/log_handle.c b/plugins/restful/log_handle.c
index 9f132261..2b07f970 100644
--- a/plugins/restful/log_handle.c
+++ b/plugins/restful/log_handle.c
@@ -62,6 +62,8 @@ void handle_logs_files(nng_aio *aio)
         return;
     }
 
+    rv = system("rm -rf /tmp/neuron_debug.tar.gz");
+    nlog_warn("remove old neuron_debug.tar.gz, rv: %d", rv);
     /* tar the neuron directory */
     rv = system("tar -zcvf /tmp/neuron_debug.tar.gz ../neuron");
     if (rv == -1) {
@@ -72,7 +74,7 @@ void handle_logs_files(nng_aio *aio)
         return;
     } else {
         if (WIFEXITED(rv)) {
-            if (WEXITSTATUS(rv) != 0) {
+            if (WEXITSTATUS(rv) < 0) {
                 nlog_error("failed to create neuron_debug.tar.gz, rv: %d",
                            WEXITSTATUS(rv));
                 NEU_JSON_RESPONSE_ERROR(NEU_ERR_COMMAND_EXECUTION_FAILED, {