From 25a6a4247713f67cfa3c3d896b8788d75fe8e274 Mon Sep 17 00:00:00 2001
From: Tomo Tsuyuki <tomotsuyuki@catalyst-au.net>
Date: Thu, 3 Mar 2022 17:16:52 +1100
Subject: [PATCH] MDL-74072 cachestore_redis: Add error check for envoy proxy

---
 cache/stores/redis/lib.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cache/stores/redis/lib.php b/cache/stores/redis/lib.php
index 4ce7580ce63..8f80704f36f 100644
--- a/cache/stores/redis/lib.php
+++ b/cache/stores/redis/lib.php
@@ -680,7 +680,11 @@ class cachestore_redis extends cache_store implements cache_is_key_aware, cache_
      * @return int|null Memory used by Redis or null if we don't know
      */
     public function store_total_size(): ?int {
-        $details = $this->redis->info('MEMORY');
+        try {
+            $details = $this->redis->info('MEMORY');
+        } catch (\RedisException $e) {
+            return null;
+        }
         if (empty($details['used_memory'])) {
             return null;
         } else {