From 1bca57fa2addc3225056ac5182736358e32cfdce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vin=C3=ADcius=20Ferr=C3=A3o?=
 <2031761+viniciusferrao@users.noreply.github.com>
Date: Wed, 6 May 2026 18:50:53 -0300
Subject: [PATCH] fix: retry on HTTP 503 from OpenBMC REST API instead of
 failing

OpenBMC BMCs intermittently return 503 Service Unavailable when the
REST service is busy or recovering. xCAT reported the error immediately,
requiring the user to manually retry. A second attempt usually succeeds.

Retry the same request up to 3 times with a 3-second wait on 503.
If all retries fail, report the error as before. The existing 504
handling for bmcreboot is preserved.

Ref: #4264
---
 xCAT-server/lib/xcat/plugins/openbmc.pm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/xCAT-server/lib/xcat/plugins/openbmc.pm b/xCAT-server/lib/xcat/plugins/openbmc.pm
index 6183cf29b..346e67f76 100644
--- a/xCAT-server/lib/xcat/plugins/openbmc.pm
+++ b/xCAT-server/lib/xcat/plugins/openbmc.pm
@@ -2991,6 +2991,12 @@ sub deal_with_response {
         }
 
         if ($response->status_line eq $::RESPONSE_SERVICE_UNAVAILABLE) {
+            $node_info{$node}{_503_retries} = ($node_info{$node}{_503_retries} || 0) + 1;
+            if ($node_info{$node}{_503_retries} <= 3) {
+                $node_info{$node}{cur_status} =~ s/_RESPONSE$/_REQUEST/;
+                $node_wait{$node} = time() + 3;
+                return;
+            }
             $error = $::RESPONSE_SERVICE_UNAVAILABLE;
         } elsif ($response->status_line eq $::RESPONSE_METHOD_NOT_ALLOWED) {
             if ($node_info{$node}{cur_status} eq "REVENTLOG_RESOLVED_RESPONSE") {