From a4e6fef81ccedeab5f3bd2679457db405dddbfa8 Mon Sep 17 00:00:00 2001
From: Matthijs Mekking <matthijs@isc.org>
Date: Fri, 5 Dec 2025 09:49:01 +0100
Subject: [PATCH] Log serial when IXFR version not in journal

It may be useful to know which version (begin serial) is missing when
the IXFR version cannot be found.
---
 lib/ns/xfrout.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/ns/xfrout.c b/lib/ns/xfrout.c
index 097971fc505..66cc502dc5f 100644
--- a/lib/ns/xfrout.c
+++ b/lib/ns/xfrout.c
@@ -1008,7 +1008,8 @@ got_soa:
 			xfrout_log1(client, question_name, question_class,
 				    ISC_LOG_INFO,
 				    "IXFR version not in journal, "
-				    "falling back to AXFR");
+				    "falling back to AXFR (serial %u)",
+				    begin_serial);
 			mnemonic = "AXFR-style IXFR";
 			goto axfr_fallback;
 		}
-- 
2.47.3