Title: Socket error on read socket Last modified: December 25, 2025 --- # Socket error on read socket * Resolved [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [5 months ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/) * I am using the latest version of Redis Object Cache and WordPress. * Recently from time to time, I will encounter the following error when trying to publish or update posts: * > **Error establishing a Redis connection** > `socket error on read socket` > WordPress is unable to establish a connection to Redis. This means that the > connection information in your `wp-config.php` file are incorrect, or that > the Redis server is not reachable. * But this error is temporary. If I press back in the browser, the post list or the post will be able to show again. Then after some time, it will appear again. * Why? Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/socket-error-on-read-socket-3/page/2/?output_format=md) [→](https://wordpress.org/support/topic/socket-error-on-read-socket-3/page/2/?output_format=md) * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [5 months ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18768591) * Please post your diagnostics and read the FAQ. You might need to increase timeouts. * Thread Starter [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [5 months ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18768603) * How to get diagnostics? * > Please post your diagnostics and read the FAQ. You might need to increase timeouts. * Thread Starter [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [4 months, 4 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18769933) * I try to increase the timeout and read timeout from default 1 to 5, but still get this error. * The only solution is to flush the cache. * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [4 months, 4 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18770051) * How large is your redis dataset? `redis-cli dbsize` * Thread Starter [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [4 months, 4 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18770064) * After flushing, it is 42623 now. * > How large is your redis dataset? `redis-cli dbsize` * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [4 months, 4 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18770270) * What does `redis-cli -s slowlog get 10` show? * Thread Starter [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [4 months, 4 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18770292) * It shows “Could not connect to Redis at slowlog: No such file or directory” * > What does `redis-cli -s slowlog get 10` show? * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [4 months, 3 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18775509) * Try giving `redis-cli` your host and port so it connects. We’d need to look at your `SLOWLOG` to see whats causing these timeouts. * Thread Starter [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [4 months, 3 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18775758) * OK. Below are the slow logs: * ```wp-block-code 1) 1) (integer) 2714 2) (integer) 1767669302 3) (integer) 38971 4) 1) "ZREMRANGEBYSCORE" 2) "site1-sitewp:redis-cache:metrics" 3) "0" 4) "1767665702" 2) 1) (integer) 2713 2) (integer) 1767668401 3) (integer) 15643 4) 1) "ZREMRANGEBYSCORE" 2) "site2-sitewp:redis-cache:metrics" 3) "0" 4) "1767664801" 3) 1) (integer) 2712 2) (integer) 1767665706 3) (integer) 29917 4) 1) "ZREMRANGEBYSCORE" 2) "site1-sitewp:redis-cache:metrics" 3) "0" 4) "1767662106" 4) 1) (integer) 2711 2) (integer) 1767664802 3) (integer) 14958 4) 1) "ZREMRANGEBYSCORE" 2) "site2-sitewp:redis-cache:metrics" 3) "0" 4) "1767661202" 5) 1) (integer) 2710 2) (integer) 1767662104 3) (integer) 32010 4) 1) "ZREMRANGEBYSCORE" 2) "site1-sitewp:redis-cache:metrics" 3) "0" 4) "1767658504" 6) 1) (integer) 2709 2) (integer) 1767661202 3) (integer) 16217 4) 1) "ZREMRANGEBYSCORE" 2) "site2-sitewp:redis-cache:metrics" 3) "0" 4) "1767657602" 7) 1) (integer) 2708 2) (integer) 1767658508 3) (integer) 48554 4) 1) "ZREMRANGEBYSCORE" 2) "site1-sitewp:redis-cache:metrics" 3) "0" 4) "1767654908" 8) 1) (integer) 2707 2) (integer) 1767657602 3) (integer) 14377 4) 1) "ZREMRANGEBYSCORE" 2) "site2-sitewp:redis-cache:metrics" 3) "0" 4) "1767654002" 9) 1) (integer) 2706 2) (integer) 1767654909 3) (integer) 26049 4) 1) "ZREMRANGEBYSCORE" 2) "site1-sitewp:redis-cache:metrics" 3) "0" 4) "1767651309"10) 1) (integer) 2705 2) (integer) 1767654002 3) (integer) 15870 4) 1) "ZREMRANGEBYSCORE" 2) "site2-sitewp:redis-cache:metrics" 3) "0" 4) "1767650402" ``` * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18779398) * That’s odd, no slow Lua scripts. Please post your diagnostics from _Settings > Redis_. * Thread Starter [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18779804) * The diagnostics log is: * ```wp-block-code Status: ConnectedClient: PhpRedis (v6.0.2)Drop-in: ValidDisabled: NoPing: 1Errors: []PhpRedis: 6.0.2Relay: Not loadedPredis: 2.4.0Credis: Not loadedPHP Version: 8.2.30Plugin Version: 2.7.0Redis Version: 3.2.12Multisite: NoMetrics: EnabledMetrics recorded: 15683Filesystem: WritableGlobal Prefix: "wp_"Blog Prefix: "wp_"Timeout: 1Read Timeout: 1Retry Interval: WP_REDIS_DATABASE: 0WP_REDIS_PREFIX: "site1"WP_REDIS_PLUGIN_PATH: "/home/username/public_html/wp-content/plugins/redis-cache"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", "image_editor", "network-queries", "site-queries", "theme_files", "translation_files", "user-queries"]Ignored Groups: [ "counts", "plugins", "theme_json", "themes", "WPForms_Entry_Handler"]Unflushable Groups: []Groups Types: { "blog-details": "global", "blog-id-cache": "global", "blog-lookup": "global", "global-posts": "global", "networks": "global", "rss": "global", "sites": "global", "site-details": "global", "site-lookup": "global", "site-options": "global", "site-transient": "global", "users": "global", "useremail": "global", "userlogins": "global", "usermeta": "global", "user_meta": "global", "userslugs": "global", "redis-cache": "global", "blog_meta": "global", "image_editor": "global", "network-queries": "global", "site-queries": "global", "theme_files": "global", "translation_files": "global", "user-queries": "global", "counts": "ignored", "plugins": "ignored", "theme_json": "ignored", "themes": "ignored", "WPForms_Entry_Handler": "ignored"}Drop-ins: [ "advanced-cache.php v by ", "maintenance.php v by ", "Redis Object Cache Drop-In v2.7.0 by Till Krüss"] ``` * Thank you. * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18780692) * Try increasing the read timeout for 3 or 5 seconds, that might resolve it. * Thread Starter [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [4 months, 2 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18781051) * In the past, I have already tried to increase both the timeout and read timeout to 5 seconds. But that does not work. The only solution is flush the cache. And when I flush the cache for the first time, I will also get an error that seems your plugin cannot connect to the Redis server. But soon it becames OK. * Thread Starter [chcw](https://wordpress.org/support/users/chcw/) * (@chcw) * [4 months ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18795112) * I find the Redis exception in the PHP error log that corresponds to this error: * ```wp-block-code [20-Jan-2026 08:32:13 UTC] RedisException: socket error on read socket in /home/dntest/public_html/wp-content/object-cache.php:560Stack trace:#0 /home/dntest/public_html/wp-content/object-cache.php(560): Redis->ping()#1 /home/dntest/public_html/wp-content/object-cache.php(256): WP_Object_Cache->__construct(false)#2 /home/dntest/public_html/wp-includes/load.php(897): wp_cache_init()#3 /home/dntest/public_html/wp-settings.php(149): wp_start_object_cache()#4 /home/dntest/public_html/wp-config.php(146): require_once('/home/dntest/p...')#5 /home/dntest/public_html/wp-load.php(50): require_once('/home/dntest/p...')#6 /home/dntest/public_html/wp-admin/admin-ajax.php(22): require_once('/home/dntest/p...')#7 {main} ``` * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [4 months ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/#post-18798842) * How often does the error occur? Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/socket-error-on-read-socket-3/page/2/?output_format=md) [→](https://wordpress.org/support/topic/socket-error-on-read-socket-3/page/2/?output_format=md) You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fsocket-error-on-read-socket-3%2F%3Foutput_format%3Dmd&locale=en_US) to reply to this topic. * ![](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/) * 16 replies * 2 participants * Last reply from: [chcw](https://wordpress.org/support/users/chcw/) * Last activity: [3 months, 2 weeks ago](https://wordpress.org/support/topic/socket-error-on-read-socket-3/page/2/#post-18812708) * Status: resolved