Today - Internal Server Error

There are problems with nextcloud today

Logs:

[Wed Mar 09 13:25:53.006957 2022] [php7:error] [pid 3086] [client 172.16.0.125:59691] PHP Fatal error: Uncaught RedisException: Connection refused in /var/www/nextcloud/lib/private/RedisFactory.php:124\nStack trace:\n#0 /var/www/nextcloud/lib/private/RedisFactory.php(124): Redis->connect()\n#1 /var/www/nextcloud/lib/private/RedisFactory.php(164): OC\RedisFactory->create()\n#2 /var/www/nextcloud/lib/private/Memcache/Redis.php(43): OC\RedisFactory->getInstance()\n#3 /var/www/nextcloud/lib/private/Memcache/Factory.php(115): OC\Memcache\Redis->__construct()\n#4 /var/www/nextcloud/lib/private/Server.php(1051): OC\Memcache\Factory->createLocking()\n#5 /var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php(160): OC\Server->OC\{closure}()\n#6 /var/www/nextcloud/3rdparty/pimple/pimple/src/Pimple/Container.php(118): OC\AppFramework\Utility\SimpleContainer->OC\AppFramework\Utility\{closure}()\n#7 /var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php(127): Pimple\Container->offsetGet()\n#8 /var/www/nextcloud/lib/private/ServerContainer.php(136): OC\AppFramework\Utility\SimpleContainer->query()\n#9 in /var/www/nextcloud/lib/private/RedisFactory.php on line 124

root@download:/# service redis-server status
● redis-server.service - Advanced key-value store
Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2022-03-09 13:23:34 MSK; 7min ago
Docs: Redis,
man:redis-server(1)
Process: 3055 ExecStart=/usr/bin/redis-server /etc/redis/redis.conf (code=exited, status=0/SUCCESS)
Main PID: 3076 (redis-server)
Tasks: 4 (limit: 9203)
Memory: 2.5M
CGroup: /system.slice/redis-server.service
└─3076 /usr/bin/redis-server 127.0.0.1:0

мар 09 13:23:34 download systemd[1]: Starting Advanced key-value store…
мар 09 13:23:34 download systemd[1]: redis-server.service: Can’t open PID file /run/redis/redis-server.pid (yet?) after start: Operation not permitted
мар 09 13:23:34 download systemd[1]: Started Advanced key-value store.

Tell me what could be the problem

Please post your redis settings in nextcloud config/config.php and in /etc/redis/redis.conf.

In this documentation you find two kinds of redis configuration for Nextcloud. Please test the other one you actually not use.