Title: Get redis read errors Last modified: November 6, 2020 --- # Get redis read errors * Resolved [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * (@chamois_blanc) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/) * Hello, * I’ve recently moved my site from Cloudways to self-hosting with OpenLiteSpeed on DigitalOcean. I am surprised to see Redis read errors in my WP debug log file: * ``` RedisException: read error on connection to 127.0.0.1:6379 in .../wp-content/object-cache.php:1357 Stack trace: #0 .../wp-content/object-cache.php(1357): Redis->get('wednesdaynighth...') #1 .../wp-content/object-cache.php(114): WP_Object_Cache->get('ghu-fbb54379440...', 'options', false, NULL) #2 .../wp-includes/option.php(121): wp_cache_get('ghu-fbb54379440...', 'options') #3 .../wp-includes/option.php(1380): get_option('ghu-fbb54379440...', false) #4 .../wp-includes/option.php(1245): get_network_option(1, 'ghu-fbb54379440...', false) #5 .../wp-content/plugins/github-updater/src/GitHub_Updater/Traits/GHU_Trait.php(82): get_site_option('ghu-fbb54379440...') #6 .../wp-content/plugins/github-updater/src/GitHub_Updater/Traits/GHU_Trait.php(340): Fragen\GitHub_Updater\Plugin->get_repo_cache('enable-media-re...') #7 .../wp-content/plugins/github-updater/src/GitHub_Updater/Plugin.php(256): Fragen\GitHub_Updater\Plugin->waiting_for_background_update(Object(stdClass)) #8 .../wp-content/plugins/github-updater/src/GitHub_Updater/Base.php(182): Fragen\GitHub_Updater\Plugin->get_remote_plugin_meta() #9 .../wp-content/plugins/github-updater/src/GitHub_Updater/Base.php(172): Fragen\GitHub_Updater\Base->get_meta_plugins() #10 .../wp-includes/class-wp-hook.php(287): Fragen\GitHub_Updater\Base->load('') #11 .../wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #12 .../public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #13 .../public_html/wp-settings.php(546): do_action('init') #14 .../public_html/wp-config.php(121): require_once('/home/wednesday...') #15 .../public_html/wp-load.php(37): require_once('/home/wednesday...') #16 .../public_html/wp-blog-header.php(13): require_once('/home/wednesday...') #17 .../public_html/index.php(17): require('/home/wednesday...') #18 {main} ``` * Any idea what they could be caused by? or how to root cause them? Also what are the consequences of such errors? * Thank you! Viewing 12 replies - 1 through 12 (of 12 total) * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13631519) * Can you post your diagnostics? * Did you install Redis Server on your Droplet? * Thread Starter [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * (@chamois_blanc) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13631528) * I did yes: * ``` > service redis status ● redis-server.service - Advanced key-value store Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled) Active: active (running) since Mon 2020-11-02 12:06:10 PST; 4 days ago Docs: http://redis.io/documentation, man:redis-server(1) Main PID: 947 (redis-server) Tasks: 4 (limit: 4620) Memory: 144.4M CGroup: /system.slice/redis-server.service └─947 /usr/bin/redis-server 127.0.0.1:6379 Nov 02 12:06:09 droplet-openlitespeed-server systemd[1]: Starting Advanced key-value store... Nov 02 12:06:10 droplet-openlitespeed-server systemd[1]: redis-server.service: Can't open PID file /run/redis/redis-server.pid (yet?) after start: Operation not permitted Nov 02 12:06:10 droplet-openlitespeed-server systemd[1]: Started Advanced key-value store. ``` * Here are the diagnostics: * ``` Status: Connected Client: PhpRedis (v5.2.2) Drop-in: Valid Disabled: No Filesystem: Working Ping: 1 Errors: [] PhpRedis: 5.2.2 Predis: Not loaded Credis: Not loaded PHP Version: 7.4.12 Plugin Version: 2.0.15 Redis Version: 5.0.7 Multisite: No Global Prefix: "wp_" Blog Prefix: "wp_" WP_REDIS_PREFIX: "wednesdaynighthop.com" WP_CACHE_KEY_SALT: "wednesdaynighthop.com" 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", "wpfront-user-role-editor", "tribe-events-non-persistent" ] Unflushable Groups: [] Drop-ins: [ "advanced-cache.php v by ", "Redis Object Cache Drop-In v2.0.15 by Till Krüss" ] ``` * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13631556) * That looks like a one off error then, since it says “Connected”. * Thread Starter [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * (@chamois_blanc) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13631563) * But I am getting a lot of them: * ``` [06-Nov-2020 20:04:46 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 20:31:57 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:03:36 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:03:36 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:03:36 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:03:39 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:03:52 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:06:05 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:06:05 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:881 [06-Nov-2020 21:06:05 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:11:42 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:11:52 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:19:21 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:19:59 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:20:31 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 [06-Nov-2020 21:21:07 UTC] RedisException: read error on connection to 127.0.0.1:6379 in .../public_html/wp-content/object-cache.php:1357 ``` * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13631764) * I can’t assist with this, it’s specific to your server. * I’d recommend asking on Stack Overflow or the Digital Ocean community. * Thread Starter [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * (@chamois_blanc) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13631811) * Thanks Till. I understand. * Just one question: Could it be due to my settings appendonly to yes (for a separate nodeJS app) in redis.conf? * I see this in the redis-server.log file: `502894:M 06 Nov 2020 15:02:35.073 * Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.` * I will understand if you feel you cannot respond conclusively. * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13631903) * That could cause it yeah 👍🏻 * Thread Starter [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * (@chamois_blanc) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13631968) * Thanks! * Apparently I have two appendonly.aof files :/ * ``` /var/lib/redis/appendonly.aof /data/appendonly.aof ``` * That cannot be good, will fix. * Thread Starter [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * (@chamois_blanc) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13632120) * The errors seem to be now gone, and it was entirely my bad. I had a regular redis server running with the server config and a separate redis server running through Docker with a different config (especially different appendonly.aof file locations). Most likely there were stomping on each other. I switched the Docker redis server to a different port and removed the appendonly setting from the regular server config. * Thread Starter [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * (@chamois_blanc) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13632121) * Thank you for taking the time to answer my questions 🙂 * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13633631) * Glad to hear it is resolved! * Thread Starter [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * (@chamois_blanc) * [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13634387) * Looks like I claim victory too soon: * ``` [08-Nov-2020 02:05:29 UTC] RedisException: read error on connection to /var/run/redis/redis-server.sock:0 in .../public_html/wp-content/object-cache.php:1357 Stack trace: #0 .../public_html/wp-content/object-cache.php(1357): Redis->get('wednesdaynighth...') #1 .../public_html/wp-content/object-cache.php(114): WP_Object_Cache->get('sm_session_db_v...', 'options', false, NULL) #2 .../public_html/wp-includes/option.php(121): wp_cache_get('sm_session_db_v...', 'options') #3 .../public_html/wp-content/plugins/wp-session-manager/includes/DatabaseHandler.php(37): get_option('sm_session_db_v...', '0.0') #4 .../public_html/wp-content/plugins/wp-session-manager/wp-session-manager.php(96): EAMann\WPSession\DatabaseHandler::createTable() #5 .../public_html/wp-includes/class-wp-hook.php(285): wp_session_manager_initialize() #6 .../public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #7 .../public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #8 .../public_html/wp-settings.php(409): do_action('plugins_loaded') #9 .../public_html/wp-config.php(124): require_once('/home/wednesday...') #10 .../public_html/wp-load.php(37): require_once('/home/wednesday...') #11 .../public_html/wp-blog-header.php(13): require_once('/home/wednesday...') #12 .../public_html/index.php(17): require('/home/wednesday...') #13 {main} ``` * Will try to figure it out and post my findings. Viewing 12 replies - 1 through 12 (of 12 total) The topic ‘Get redis read errors’ is closed to new replies. * ![](https://ps.w.org/redis-cache/assets/icon-256x256.gif?rev=2568513) * [Redis Object Cache](https://wordpress.org/plugins/redis-cache/) * [Support Threads](https://wordpress.org/support/plugin/redis-cache/) * [Active Topics](https://wordpress.org/support/plugin/redis-cache/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/redis-cache/unresolved/) * [Reviews](https://wordpress.org/support/plugin/redis-cache/reviews/) ## Tags * [read error](https://wordpress.org/support/topic-tag/read-error/) * 12 replies * 2 participants * Last reply from: [therealgilles](https://wordpress.org/support/users/chamois_blanc/) * Last activity: [5 years, 5 months ago](https://wordpress.org/support/topic/get-redis-read-errors/#post-13634387) * Status: resolved