2.12.2 causing 503 error with WPE object cache turned on

While trying to install Spectra 2.12.2 on staging site for testing we immediately started getting 503 errors. Reverted site and installed Sepctra twice with same result. Found that disabling object cache would let site function, and when object cache was reenabled it continues to function. However I’m a little worried that the site might run into issues with object cache later on given this result.

WPEngine support suggests that “if the autoloaded requests from a plugin is high it will interfere with object cache, object cache stores queries values higher than 800k will break and cause 502 and 503 errors.”

Here are the log files related to the issue.

7 PHP Fatal error: Uncaught Error: Failed opening required ‘/nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-scripts-utils.php’ (include_path=’.:/usr/share/pear/php:/usr/share/php’) in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php:154#012Stack trace:#012#0 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(324): UAGB_Loader->load_plugin(”)#012#1 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#012#2 /nas/content/live/agcentricmnstg/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#012#3 /nas/content/live/agcentricmnstg/wp-settings.php(506): do_action(‘plugins_loaded’)#012#4 /nas/content/live/agcentricmnstg/wp-config.php(123): require_once(‘/nas/content/li…’)#012#5 /nas/content/live/agcentricmnstg/wp-load.php(50): require_once(‘/nas/content/li…’)#012#6 /nas/content/live/agcentricmnstg/wp-blog-header.php(13): require_once(‘/nas/content/li…’)#012#7 /nas/content/live/agcentricmnstg/index.php(17): require(‘/nas/content/li…’)#012#8 {main}#012 thrown in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php on line 154
2 PHP Fatal error: Uncaught Error: Failed opening required ‘/nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-scripts-utils.php’ (include_path=’.:/usr/share/pear/php:/usr/share/php’) in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php:154#012Stack trace:#012#0 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(324): UAGB_Loader->load_plugin(”)#012#1 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#012#2 /nas/content/live/agcentricmnstg/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#012#3 /nas/content/live/agcentricmnstg/wp-settings.php(506): do_action(‘plugins_loaded’)#012#4 /nas/content/live/agcentricmnstg/wp-config.php(123): require_once(‘/nas/content/li…’)#012#5 /nas/content/live/agcentricmnstg/wp-load.php(50): require_once(‘/nas/content/li…’)#012#6 /nas/content/live/agcentricmnstg/wp-cron.php(46): require_once(‘/nas/content/li…’)#012#7 {main}#012 thrown in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php on line 154
2 PHP Fatal error: Uncaught Error: Failed opening required ‘/nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-scripts-utils.php’ (include_path=’.:/usr/share/pear/php:/usr/share/php’) in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php:154#012Stack trace:#012#0 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(324): UAGB_Loader->load_plugin(”)#012#1 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#012#2 /nas/content/live/agcentricmnstg/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#012#3 /nas/content/live/agcentricmnstg/wp-settings.php(506): do_action(‘plugins_loaded’)#012#4 /nas/content/live/agcentricmnstg/wp-config.php(123): require_once(‘/nas/content/li…’)#012#5 /nas/content/live/agcentricmnstg/wp-load.php(50): require_once(‘/nas/content/li…’)#012#6 /nas/content/live/agcentricmnstg/wp-admin/admin.php(34): require_once(‘/nas/content/li…’)#012#7 /nas/content/live/agcentricmnstg/wp-admin/edit.php(10): require_once(‘/nas/content/li…’)#012#8 {main}#012 thrown in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php on line 154
2 PHP Fatal error: Uncaught Error: Failed opening required ‘/nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-scripts-utils.php’ (include_path=’.:/usr/share/pear/php:/usr/share/php’) in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php:154#012Stack trace:#012#0 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(324): UAGB_Loader->load_plugin(”)#012#1 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#012#2 /nas/content/live/agcentricmnstg/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#012#3 /nas/content/live/agcentricmnstg/wp-settings.php(506): do_action(‘plugins_loaded’)#012#4 /nas/content/live/agcentricmnstg/wp-config.php(123): require_once(‘/nas/content/li…’)#012#5 /nas/content/live/agcentricmnstg/wp-load.php(50): require_once(‘/nas/content/li…’)#012#6 /nas/content/live/agcentricmnstg/wp-admin/admin-ajax.php(22): require_once(‘/nas/content/li…’)#012#7 {main}#012 thrown in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php on line 154
2 PHP Fatal error: Uncaught Error: Class “UagAdmin\Api\Common_Settings” not found in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/admin-core/api/api-init.php:106#012Stack trace:#012#0 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(324): UagAdmin\Api\Api_Init->register_routes(Object(WP_REST_Server))#012#1 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#012#2 /nas/content/live/agcentricmnstg/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#012#3 /nas/content/live/agcentricmnstg/wp-includes/rest-api.php(593): do_action(‘rest_api_init’, Object(WP_REST_Server))#012#4 /nas/content/live/agcentricmnstg/wp-includes/rest-api.php(417): rest_get_server()#012#5 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(324): rest_api_loaded(Object(WP))#012#6 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array)#012#7 /nas/content/live/agcentricmnstg/wp-includes/plugin.php(565): WP_Hook->do_action(Array)#012#8 /nas/content/live/agcentricmnstg/wp-includes/class-wp.php(418): do_action_ref_array(‘parse_request’, Array)#012#9 /nas/content/live/agcentricmnstg/wp-includes/class-wp.php(813): WP->parse_request(”)#012#10 /nas/content/live/agcentricmnstg/wp-includes/functions.php(1336): WP->main(”)#012#11 /nas/content/live/agcentricmnstg/wp-blog-header.php(16): wp()#012#12 /nas/content/live/agcentricmnstg/index.php(17): require(‘/nas/content/li…’)#012#13 {main}#012 thrown in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/admin-core/api/api-init.php on line 106
1 PHP Fatal error: Uncaught Error: Failed opening required ‘/nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-scripts-utils.php’ (include_path=’.:/usr/share/pear/php:/usr/share/php’) in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php:154#012Stack trace:#012#0 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(324): UAGB_Loader->load_plugin(”)#012#1 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#012#2 /nas/content/live/agcentricmnstg/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#012#3 /nas/content/live/agcentricmnstg/wp-settings.php(506): do_action(‘plugins_loaded’)#012#4 /nas/content/live/agcentricmnstg/wp-config.php(123): require_once(‘/nas/content/li…’)#012#5 /nas/content/live/agcentricmnstg/wp-load.php(50): require_once(‘/nas/content/li…’)#012#6 /nas/content/live/agcentricmnstg/wp-admin/admin.php(34): require_once(‘/nas/content/li…’)#012#7 {main}#012 thrown in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php on line 154
1 PHP Fatal error: Uncaught Error: Class “UagAdmin\Api\Api_Init” not found in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/admin-core/admin-loader.php:103#012Stack trace:#012#0 /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/admin-core/admin-loader.php(86): UagAdmin\Admin_Loader->setup_classes()#012#1 /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/admin-core/admin-loader.php(40): UagAdmin\Admin_Loader->__construct()#012#2 /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/admin-core/admin-loader.php(114): UagAdmin\Admin_Loader::get_instance()#012#3 /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/classes/class-uagb-loader.php(180): require_once(‘/nas/content/li…’)#012#4 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(324): UAGB_Loader->load_plugin(”)#012#5 /nas/content/live/agcentricmnstg/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)#012#6 /nas/content/live/agcentricmnstg/wp-includes/plugin.php(517): WP_Hook->do_action(Array)#012#7 /nas/content/live/agcentricmnstg/wp-settings.php(506): do_action(‘plugins_loaded’)#012#8 /nas/content/live/agcentricmnstg/wp-config.php(123): require_once(‘/nas/content/li…’)#012#9 /nas/content/live/agcentricmnstg/wp-load.php(50): require_once(‘/nas/content/li…’)#012#10 /nas/content/live/agcentricmnstg/wp-admin/admin.php(34): require_once(‘/nas/content/li…’)#012#11 /nas/content/live/agcentricmnstg/wp-admin/post-new.php(10): require_once(‘/nas/content/li…’)#012#12 {main}#012 thrown in /nas/content/live/agcentricmnstg/wp-content/plugins/ultimate-addons-for-gutenberg/admin-core/admin-loader.php on line 103

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