Error when activating obeject cache

Hello,

I am using the Redis-Plugin on two different websites, both on the same server with the same WordPress-Theme and a similar set of plugins.

Redis is running in Debian 10, systemctl service redis is showing me, that the Redis service is up and running. I also have flushed the cache with redis-cli.

Nevertheless I have the problem, that activating the object-cache / drop-in (object-cache.php) is causing the following error:

Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

The website is unavailable until I am removing object-cache.php.

I am getting this error on one of my websites permanently, the other site is running with redis drop-in activating, but sometimes I am also getting an error.

On the same server I had an obsolete WordPress-site which was running the Redis plugin without any problems.

If Redis plugin is running I am getting these diagnostics:

Status: Verbunden
Client: PhpRedis (v5.3.4)
Drop-in: Valid
Disabled: No
Ping: 1
Errors: []
PhpRedis: 5.3.4
Predis: Not loaded
Credis: Not loaded
PHP Version: 8.0.12
Plugin Version: 2.0.21
Redis Version: 5.0.3
Multisite: No
Metrics: Enabled
Metrics recorded: 2
Filesystem: Working
Global Prefix: "xxx_"
Blog Prefix: "xxx_"
Global Groups: [
    "blog-details",
    "blog-id-cache",
    "blog-lookup",
    "global-posts",
    "networks",
    "rss",
    "sites",
    "site-details",
    "site-lookup",
    "site-options",
    "site-transient",
    "users",
    "useremail",
    "userlogins",
    "usermeta",
    "user_meta",
    "userslugs",
    "redis-cache",
    "blog_meta"
]
Ignored Groups: [
    "counts",
    "plugins",
    "themes"
]
Unflushable Groups: []
Drop-ins: [
    "Redis Object Cache Drop-In v2.0.21 by Till Krüss"
]

I have also tried to deactivate all other plugins except redis, without success.

What could I do to find the reason of this problems?

Thank you very much in advance!

• This topic was modified 4 years, 5 months ago by Regenpfeifer.
• This topic was modified 4 years, 5 months ago by Regenpfeifer.
• This topic was modified 4 years, 5 months ago by Regenpfeifer.

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