From 717636197b8427331ca9952de3f912a13b8a8d8f Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@icinga.com>
Date: Thu, 7 May 2026 08:12:57 +0200
Subject: [PATCH] IcingaRedis: Do not fail while fetching last heartbeat

fixes #1372
---
 library/Icingadb/Common/IcingaRedis.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/Icingadb/Common/IcingaRedis.php b/library/Icingadb/Common/IcingaRedis.php
index 3e9a1293..53d302b6 100644
--- a/library/Icingadb/Common/IcingaRedis.php
+++ b/library/Icingadb/Common/IcingaRedis.php
@@ -188,7 +188,7 @@ class IcingaRedis
         $rs = $redis->xread(1, null, [$stream], '0');
 
         if (is_array($rs)) {
-            $timestampKeyPos = array_search('timestamp', $rs[$stream][0][1], true);
+            $timestampKeyPos = array_search('timestamp', $rs[$stream][0][1] ?? [], true);
 
             if ($timestampKeyPos !== false && isset($rs[$stream][0][1][$timestampKeyPos + 1])) {
                 return $rs[$stream][0][1][$timestampKeyPos + 1] / 1000;