read error on connection to 127.0.0.1:6379 in wp-content/object-cache.php:738

  • Resolved Marty

    (@bozzmedia)


    1 year, 9 months ago

    ROC has been working well for us for the last year. Just today our front page reported a critical error and it took flushing the cache manually and reconnecting to resolve.

    Any idea what might have caused this? Thanks for any insight!

    [07-Feb-2023 19:41:12 UTC] RedisException: read error on connection to 127.0.0.1:6379 in /home/redacted/public_html/production/wp-content/object-cache.php:738
Stack trace:
#0 /home/redacted/public_html/production/wp-content/object-cache.php(738): Redis->select(1)
#1 /home/redacted/public_html/production/wp-content/object-cache.php(539): WP_Object_Cache->connect_using_phpredis(Array)
#2 /home/redacted/public_html/production/wp-content/object-cache.php(257): WP_Object_Cache->__construct(true)
#3 /home/redacted/public_html/production/wp-includes/load.php(730): wp_cache_init()
#4 /home/redacted/public_html/production/wp-settings.php(131): wp_start_object_cache()
#5 /home/redacted/public_html/production/wp-config.php(79): require_once('/home/redacted...')
#6 /home/redacted/public_html/production/wp-load.php(50): require_once('/home/redacted...')
#7 /home/redacted/public_html/production/wp-admin/admin.php(34): require_once('/home/redacted...')
#8 /home/redacted/public_html/production/wp-admin/options-general.php(10): require_once('/home/redacted...')
#9 {main}
Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Author Till Krüss

    (@tillkruess)

    That means Redis Server did not respond. Could be overloaded, OOM, or just a time-time hiccup.

    Thread Starter Marty

    (@bozzmedia)

    Much appreciated. Is there a best practice to avoid this state in the future, such as scheduling more frequent reboots of redis server?

    Plugin Author Till Krüss

    (@tillkruess)

    I’m not sure TBH, it also just happens every couple of days once if your server is under load.

Viewing 3 replies - 1 through 3 (of 3 total)
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