Redis Server not connected with WP 5.5

Sounds like your Redis server isn’t responding. I’d try a full server restart.

hmmm doesn’t seem to be the problem, as I can connect to the server with redis-cli, but even more important all other sites, on same server and still not updated to WP 5.5, do not have the problem as you can see by the plugin diagnostics I’ve posted above.

Please post your WP_REDIS_* constants from your config.

these are from a working website (WP 5.4):

WP_REDIS_PREFIX: “wwwgorminacom”
WP_CACHE_KEY_SALT: “wwwgorminacom”

—-

these are from a non-working website (WP 5.5):

WP_REDIS_PREFIX: “moggiesdoggiescom”
WP_CACHE_KEY_SALT: “moggiesdoggiescom”

or another one (WP 5.5)

WP_REDIS_PREFIX: “wwwhotelbelvederefortedeimarmicom”
WP_CACHE_KEY_SALT: “wwwhotelbelvederefortedeimarmicom”

etc. etc. I have tens of customer websites and the only ‘not connected’ errors come from those who got updated to 5.5

I’d try to set a dedicated WP_REDIS_HOST and WP_REDIS_PORT to ensure the connection is explicit: https://github.com/rhubarbgroup/redis-cache/wiki

It’s not a WP 5.5 error, it has to be at the PHP-FPM level of your server. Maybe Opcode-cache.

nothing…

I’ve just tried to update the wp-config.php as you suggested, the modifications are seen by the plugin as you can see by the copy paste from diagnostics below:

WP_REDIS_HOST: "127.0.0.1"
WP_REDIS_PORT: 6379
WP_REDIS_DATABASE: 0
WP_REDIS_PREFIX: "moggiesdoggiescom"
WP_CACHE_KEY_SALT: "moggiesdoggiescom"

I’ve even restarted the php-fpm service just to be sure, but the ‘not connected’ error persists.
But as I said, only for the wp 5.5, these websites are from the same server and the same cpanel/php-fpm account.

Can you post your error log?

Hi again ??

found the culprit, it’s the Envato market plugin that throws an error on WP 5.5 and your plugin:

this is the error log when I click on diagnostics in the Redis plugin settings page:

RedisException: socket error on read socket in /wp-content/object-cache.php:1260
Stack trace:
#0 ************/wp-content/object-cache.php(1260): Redis->eval('redis.replicate...')
#1 ************/wp-content/object-cache.php(1131): WP_Object_Cache->{closure}()
#2 ************/wp-content/object-cache.php(94): WP_Object_Cache->flush(0)
#3 ************/wp-content/plugins/envato-market/inc/class-envato-market-items.php(194): wp_cache_flush()
#4 ************/wp-content/plugins/envato-market/inc/class-envato-market-items.php(302): Envato_Market_Items->wp_plugins()
#5 ************/wp-includes/class-wp-hook.php(289): Envato_Market_Items->update_plugins(Object(stdClass))
#6 ************/wp-includes/plugin.php(206): WP_Hook->apply_filters(Object(stdClass), Array)
#7 ************/wp-includes/option.php(1930): apply_filters('pre_set_site_tr...', Object(stdClass), 'update_plugins')
#8 ************/wp-includes/update.php(347): set_site_transient('update_plugins', Object(stdClass))
#9 ************/wp-includes/update.php(813): wp_update_plugins()
#10 ************/wp-includes/class-wp-hook.php(287): _maybe_update_plugins('')
#11 ************/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#12 ************/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#13 ************/wp-admin/admin.php(175): do_action('admin_init')
#14 ************/wp-admin/options-general.php(10): require_once('/****/****/p...')
#15 {main}

Once I deactivated the Envato plugin, the redis connection worked flawlessly

Hope this helps

Glad it’s resolved ????