Title: Weird Error in Debug Log Last modified: January 20, 2023 --- # Weird Error in Debug Log * Resolved [angrowmkt1](https://wordpress.org/support/users/angrowmkt1/) * (@angrowmkt1) * [3 years, 4 months ago](https://wordpress.org/support/topic/weird-error-in-debug-log/) * Hello, Hope you doing great, I’m having a weird ConnectionException error. Could you please let me know what is it? Everything working well but this weird error in my debug log file, and I don’t like to see err in my debug file.Thank you! here s the log file:[20-Jan-2023 01:51:26 UTC] Predis\Connection\ConnectionException: Error while reading line from the server. [tcp://127.0.0.1:6379] in /var/www/ mydomainname.com/public_html/wp-content/plugins/redis-cache/dependencies/predis/ predis/src/Connection/AbstractConnection.php:132Stack trace:**0 /var/www/mydomainname. com/public_html/wp-content/plugins/redis-cache/dependencies/predis/predis/src/ Connection/StreamConnection.php(286): Predis\Connection\AbstractConnection->onConnectionError()**** 1 /var/www/mydomainname.com/public_html/wp-content/plugins/redis-cache/dependencies/ predis/predis/src/Connection/AbstractConnection.php(120): Predis\Connection\StreamConnection- >read()****2 /var/www/mydomainname.com/public_html/wp-content/plugins/redis-cache/ dependencies/predis/predis/src/Connection/AbstractConnection.php(112): Predis\ Connection\AbstractConnection->readResponse()****3 /var/www/mydomainname.com/ public_html/wp-content/plugins/redis-cache/dependencies/predis/predis/src/Client. php(316): Predis\Connection\AbstractConnection->executeCommand()****4 /var/www/ mydomainname.com/public_html/wp-content/plugins/redis-cache/dependencies/predis/ predis/src/Client.php(299): Predis\Client->executeCommand()****5 /var/www/mydomainname. com/public_html/wp-content/object-cache.php(1872): Predis\Client->__call()**** 6 /var/www/mydomainname.com/public_html/wp-content/object-cache.php(193): WP_Object_Cache- >get()****7 /var/www/mydomainname.com/public_html/wp-cron.php(70): wp_cache_get()**** 8 /var/www/mydomainname.com/public_html/wp-cron.php(191): _get_cron_lock()**** 9 {main}**[20-Jan-2023 03:51:32 UTC] Predis\Connection\ConnectionException: Error while reading line from the server. [tcp://127.0.0.1:6379] in /var/www/mydomainname. com/public_html/wp-content/plugins/redis-cache/dependencies/predis/predis/src/ Connection/AbstractConnection.php:132Stack trace:**0 /var/www/mydomainname.com/ public_html/wp-content/plugins/redis-cache/dependencies/predis/predis/src/Connection/ StreamConnection.php(286): Predis\Connection\AbstractConnection->onConnectionError()**** 1 /var/www/mydomainname.com/public_html/wp-content/plugins/redis-cache/dependencies/ predis/predis/src/Connection/AbstractConnection.php(120): Predis\Connection\StreamConnection- >read()****2 /var/www/mydomainname.com/public_html/wp-content/plugins/redis-cache/ dependencies/predis/predis/src/Connection/AbstractConnection.php(112): Predis\ Connection\AbstractConnection->readResponse()****3 /var/www/mydomainname.com/ public_html/wp-content/plugins/redis-cache/dependencies/predis/predis/src/Client. php(316): Predis\Connection\AbstractConnection->executeCommand()****4 /var/www/ mydomainname.com/public_html/wp-content/plugins/redis-cache/dependencies/predis/ predis/src/Client.php(299): Predis\Client->executeCommand()****5 /var/www/mydomainname. com/public_html/wp-content/object-cache.php(1872): Predis\Client->__call()**** 6 /var/www/mydomainname.com/public_html/wp-content/object-cache.php(193): WP_Object_Cache- >get()****7 /var/www/mydomainname.com/public_html/wp-cron.php(70): wp_cache_get()**** 8 /var/www/mydomainname.com/public_html/wp-cron.php(191): _get_cron_lock()**** 9 {main}****Here is the diagnostics:**Status: ConnectedClient: Predis (v2.0.3) Drop-in: ValidDisabled: NoPing: PONGErrors: []PhpRedis: Not loadedRelay: Not loadedPredis: 2.0.3Credis: Not loadedPHP Version: 7.4.33Plugin Version: 2.2.3Redis Version: 7.0.7Multisite: NoMetrics: EnabledMetrics recorded: 1165Filesystem: WorkingGlobal Prefix: “nf”Blog Prefix: “nf”WP_REDIS_PREFIX: “mydomainname.com” WP_CACHE_KEY_SALT: “mydomainname.com”WP_REDIS_PLUGIN_PATH: “/var/www/mydomainname. com/public_html/wp-content/plugins/redis-cache”WP_REDIS_IGNORED_GROUPS: [    “ bp_notifications”,    “bp_pages”,    “wp_review_total”,    “wp-review”,    “mts_recent_reviews”,“ comment”,    “get_the_author_meta()”,    “wc_session_id”,    “bp_messages”,  “ options”,    “WPML_TM_ICL_Translations::translations”]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: [“ bp_notifications”,    “bp_pages”,    “wp_review_total”,    “wp-review”,    “mts_recent_reviews”,“ comment”,    “get_the_author_meta()”,    “wc_session_id”,    “bp_messages”,  “ options”,    “WPML_TM_ICL_Translations–translations”,    “counts”,    “plugins”,“ themes”]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”,    “bp_notifications”: “ignored”,    “bp_pages”: “ignored”,“ wp_review_total”: “ignored”,    “wp-review”: “ignored”,    “mts_recent_reviews”:“ ignored”,    “comment”: “ignored”,    “get_the_author_meta()”: “ignored”,    “ wc_session_id”: “ignored”,    “bp_messages”: “ignored”,    “options”: “ignored”,“ WPML_TM_ICL_Translations–translations”: “ignored”,    “blog_meta”: “global”, “ counts”: “ignored”,    “plugins”: “ignored”,    “themes”: “ignored”}Drop-ins:[“ Query Monitor Database Class (Drop-in) v3.11.1 by John Blackbourn”,    “Redis Object Cache Drop-In v2.2.3 by Till Krüss”] Viewing 4 replies - 1 through 4 (of 4 total) * Thread Starter [angrowmkt1](https://wordpress.org/support/users/angrowmkt1/) * (@angrowmkt1) * [3 years, 4 months ago](https://wordpress.org/support/topic/weird-error-in-debug-log/#post-16391746) * I forget to add my wp-config.php files for redis: * /* REDIS SITE CONF */ define( ‘WP_CACHE_KEY_SALT’, ‘mydomain.com’ );define( ‘ WP_CACHE’, true ); * /* REDIS EXCLUDE GROUPS */ define(‘WP_REDIS_IGNORED_GROUPS’, [“bp_notifications”,“ bp_pages”,“wp_review_total”,“wp-review”,“mts_recent_reviews”,“comment”,“get_the_author_meta()”,“ wc_session_id”,“bp_messages”,“options”,“WPML_TM_ICL_Translations::translations”,]); and my server is Ubuntu 20LTSnginx 18Mariadb10.3Redis 7php7.4 * Thread Starter [angrowmkt1](https://wordpress.org/support/users/angrowmkt1/) * (@angrowmkt1) * [3 years, 4 months ago](https://wordpress.org/support/topic/weird-error-in-debug-log/#post-16391988) * there is no control panel or something like that pure manual installation of all the server app and configration. * Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/) * (@tillkruess) * [3 years, 4 months ago](https://wordpress.org/support/topic/weird-error-in-debug-log/#post-16394782) * ```wp-block-code Error while reading line from the server. [tcp://127.0.0.1:6379] ``` * Typically means your Redis Server isn’t responding, try restarting it. * Thread Starter [angrowmkt1](https://wordpress.org/support/users/angrowmkt1/) * (@angrowmkt1) * [3 years, 4 months ago](https://wordpress.org/support/topic/weird-error-in-debug-log/#post-16427629) * For those encountering this issue, I was using PHP 8 and encountered compatibility issues with one of the plugins. I switched back to PHP 7.4 but forgot to install the PHP 7.4 Redis module on Nginx. I was using the PHP 8.0 Redis module, which caused the error. I have now installed it and the problem has been resolved. * `sudo apt-get install redis-server php7.4-redis -y Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘Weird Error in Debug Log’ 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/) * 4 replies * 2 participants * Last reply from: [angrowmkt1](https://wordpress.org/support/users/angrowmkt1/) * Last activity: [3 years, 4 months ago](https://wordpress.org/support/topic/weird-error-in-debug-log/#post-16427629) * Status: resolved