Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1040] Too many connections in /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php:67 Stack trace: #0 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(67): PDO::connect('mysql:host=mysq...', 'periodicals', Object(SensitiveParameterValue), Array) #1 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(44): Illuminate\Database\Connectors\Connector->createPdoConnection('mysql:host=mysq...', 'periodicals', Object(SensitiveParameterValue), Array) #2 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/MySqlConnector.php(24): Illuminate\Database\Connectors\Connector->createConnection('mysql:host=mysq...', Array, Array) #3 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/ConnectionFactory.php(186): Illuminate\Database\Connectors\MySqlConnector->connect(Array) #4 [internal function]: Illuminate\Database\Connectors\ConnectionFactory->{closure:Illuminate\Database\Connectors\ConnectionFactory::createPdoResolverWithHosts():181}() #5 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(1257): call_user_func(Object(Closure)) #6 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(578): Illuminate\Database\Connection->getPdo() #7 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(827): Illuminate\Database\Connection->{closure:Illuminate\Database\Connection::statement():573}('SET time_zone =...', Array) #8 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(794): Illuminate\Database\Connection->runQueryCallback('SET time_zone =...', Array, Object(Closure)) #9 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(573): Illuminate\Database\Connection->run('SET time_zone =...', Array, Object(Closure)) #10 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/DatabaseManager.php(491): Illuminate\Database\Connection->statement('SET time_zone =...') #11 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(363): Illuminate\Database\DatabaseManager->__call('statement', Array) #12 /var/www/html/lib/pkp/classes/core/PKPApplication.php(315): Illuminate\Support\Facades\Facade::__callStatic('statement', Array) #13 /var/www/html/lib/pkp/classes/core/PKPApplication.php(270): PKP\core\PKPApplication->initializeTimeZone() #14 /var/www/html/lib/pkp/classes/core/PKPApplication.php(240): PKP\core\PKPApplication->initializeLaravelContainer() #15 /var/www/html/classes/core/Application.php(47): PKP\core\PKPApplication->__construct() #16 /var/www/html/lib/pkp/includes/bootstrap.php(37): APP\core\Application->__construct() #17 /var/www/html/index.php(25): require_once('/var/www/html/l...') #18 {main} Next Illuminate\Database\QueryException: SQLSTATE[HY000] [1040] Too many connections (Connection: mysql, Host: mysql_periodicals, Port: , Database: periodicals, SQL: SET time_zone = '+00:00') in /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php:838 Stack trace: #0 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(794): Illuminate\Database\Connection->runQueryCallback('SET time_zone =...', Array, Object(Closure)) #1 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php(573): Illuminate\Database\Connection->run('SET time_zone =...', Array, Object(Closure)) #2 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/DatabaseManager.php(491): Illuminate\Database\Connection->statement('SET time_zone =...') #3 /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(363): Illuminate\Database\DatabaseManager->__call('statement', Array) #4 /var/www/html/lib/pkp/classes/core/PKPApplication.php(315): Illuminate\Support\Facades\Facade::__callStatic('statement', Array) #5 /var/www/html/lib/pkp/classes/core/PKPApplication.php(270): PKP\core\PKPApplication->initializeTimeZone() #6 /var/www/html/lib/pkp/classes/core/PKPApplication.php(240): PKP\core\PKPApplication->initializeLaravelContainer() #7 /var/www/html/classes/core/Application.php(47): PKP\core\PKPApplication->__construct() #8 /var/www/html/lib/pkp/includes/bootstrap.php(37): APP\core\Application->__construct() #9 /var/www/html/index.php(25): require_once('/var/www/html/l...') #10 {main} thrown in /var/www/html/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php on line 838