php-redis is crashing

[schreibubi]

Since an upgrade last week my nextcloud instance is crashing in php-redis:
[Sat Sep 23 18:05:25.143830 2023] [core:notice] [pid 1] AH00051: child pid 53 exit signal Segmentation fault (11>
Process 834558 (apache2) of user 100032 dumped core.

Stack trace of thread 54:
#0 0x00007f8f09250c69 n/a (/usr/local/lib/php/extensions/no-debug-non-zts-20220829/redis.so + 0x6bc69)
#1 0x000000000000000e n/a (n/a + 0x0)
ELF object binary architecture: AMD x86-64

I'm running nextcloud:latest as of today.

[robeatoz]

I encountered the same issue with my Nextcloud instance running on the image nextcloud:27.1.1-apache. As a temporary workaround, I've disabled Redis by commenting out the memcache.distributed and memcache.locking lines in the config.php file. Here's the relevant snippet:

  'memcache.local' => '\\OC\\Memcache\\APCu',
  // 'memcache.distributed' => '\\OC\\Memcache\\Redis',
  // 'memcache.locking' => '\\OC\\Memcache\\Redis',

By doing so, I've managed to stabilize my Nextcloud instance until a permanent fix is available.

[schreibubi]

Thanks! Disabling both memcache settings got me back into a working state. I had to also disable these lines in redis.config.php, since I've been setting the REDIS_HOST variable..

[joshtrichards]

This might need to be fixable by bumping up the underlying php image, which would bring in a bump from phpredis v6.0.0 to v6.0.1 and PHP to v8.2.11:

https://github.com/phpredis/phpredis/blob/develop/CHANGELOG.md#601---2023-09-23-github-pecl
https://www.php.net/ChangeLog-8.php#PHP_8_2

I'm particularly suspicious of phpredis/phpredis#2390

[J0WI]

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