I’m using OJS 3.4.0-8, and sometimes it goes really slow, I located php error log, and I found this:
Next Illuminate\Database\QueryException: SQLSTATE[HY000] [2002] Connection refused (SQL: SET time_zone = ‘+00:00’) in /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminat$
Stack trace:
#0 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(899): Illuminate\Database\Connection->runQueryCallback()
#1 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(879): Illuminate\Database\Connection->tryAgainIfCausedByLostConnection()
#2 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(723): Illuminate\Database\Connection->handleQueryException()
#3 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(546): Illuminate\Database\Connection->run()
#4 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/DatabaseManager.php(469): Illuminate\Database\Connection->statement()
#5 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(338): Illuminate\Database\DatabaseManager->__call()
#6 /var/www/html/lib/pkp/classes/core/PKPApplication.php(268): Illuminate\Support\Facades\Facade::__callStatic()
#7 /var/www/html/lib/pkp/classes/core/PKPApplication.php(230): PKP\core\PKPApplication->initializeTimeZone()
#8 /var/www/html/lib/pkp/classes/core/PKPApplication.php(200): PKP\core\PKPApplication->initializeLaravelContainer()
#9 /var/www/html/classes/core/Application.php(50): PKP\core\PKPApplication->__construct()
#10 /var/www/html/lib/pkp/includes/bootstrap.php(37): APP\core\Application->__construct()
#11 /var/www/html/index.php(18): require_once(‘…’)
#12 {main}
thrown in /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php on line 760
[08-Jun-2025 21:49:59 UTC] PHP Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] Connection refused in /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Dat$
Stack trace:
#0 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(70): PDO->__construct()
#1 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(100): Illuminate\Database\Connectors\Connector->createPdoConnection()
#2 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(50): Illuminate\Database\Connectors\Connector->tryAgainIfCausedByLostConnection$
#3 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/MySqlConnector.php(24): Illuminate\Database\Connectors\Connector->createConnection()
#4 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/ConnectionFactory.php(184): Illuminate\Database\Connectors\MySqlConnector->connect()
#5 [internal function]: Illuminate\Database\Connectors\ConnectionFactory->Illuminate\Database\Connectors{closure}()
#6 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(1181): call_user_func()
#7 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(1217): Illuminate\Database\Connection->getPdo()
#8 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(486): Illuminate\Database\Connection->getReadPdo()
#9 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(414): Illuminate\Database\Connection->getPdoForSelect()
#10 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(753): Illuminate\Database\Connection->Illuminate\Database{closure}()
#11 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(899): Illuminate\Database\Connection->runQueryCallback()
#12 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(879): Illuminate\Database\Connection->tryAgainIfCausedByLostConnection()
#13 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(723): Illuminate\Database\Connection->handleQueryException()
#14 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(422): Illuminate\Database\Connection->run()
#15 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2706): Illuminate\Database\Connection->select()
#16 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2694): Illuminate\Database\Query\Builder->runSelect()
#17 /var/www/html/lib/pkp/lib/vendor/Laravel/framework/src/Illuminate/Database/Query/Builder.php(3230): Illuminate\Database\Query\Builder->Illuminate\Database\Query{closure}()
#18 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2695): Illuminate\Database\Query\Builder->onceWithColumns()
#19 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(3157): Illuminate\Database\Query\Builder->get()
#20 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(3085): Illuminate\Database\Query\Builder->aggregate()
#21 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php(1869): Illuminate\Database\Query\Builder->count()
#22 /var/www/html/lib/pkp/classes/queue/JobRunner.php(203): Illuminate\Database\Eloquent\Builder->__call()
#23 /var/www/html/lib/pkp/classes/core/PKPQueueProvider.php(135): PKP\queue\JobRunner->processJobs()
#24 [internal function]: PKP\core\PKPQueueProvider->PKP\core{closure}()
#25 {main}
Any ideas on what could be causing these errors?
Thanks