Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[08004] [1040] Too many connections' in /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php on line 144

PDOException: SQLSTATE[08004] [1040] Too many connections in /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php on line 129

Call Stack:
    0.0001     228152   1. {main}() /var/www/applications/map/htdocs/public/index.php:0
    0.0022     426672   2. Zend_Application->bootstrap() /var/www/applications/map/htdocs/public/index.php:32
    0.0022     426792   3. Zend_Application_Bootstrap_BootstrapAbstract->bootstrap() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Application.php:355
    0.0022     426880   4. Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Application/Bootstrap/BootstrapAbstract.php:598
    0.0069     891176   5. Zend_Application_Bootstrap_BootstrapAbstract->_executeResource() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Application/Bootstrap/BootstrapAbstract.php:634
    0.0069     891904   6. Bootstrap->_initView() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Application/Bootstrap/BootstrapAbstract.php:681
    0.0121    1136608   7. Zend_Db_Select->where() /var/www/applications/map/htdocs/application/Bootstrap.php:183
    0.0121    1136784   8. Zend_Db_Select->_where() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Select.php:475
    0.0121    1136840   9. Zend_Db_Adapter_Abstract->quoteInto() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Select.php:1005
    0.0121    1137152  10. Zend_Db_Adapter_Abstract->quote() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Abstract.php:931
    0.0121    1137224  11. Zend_Db_Adapter_Pdo_Mysql->_connect() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Abstract.php:861
    0.0121    1137488  12. Zend_Db_Adapter_Pdo_Abstract->_connect() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Pdo/Mysql.php:111
    0.0121    1138264  13. PDO->__construct() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:129

Zend_Db_Adapter_Exception: SQLSTATE[08004] [1040] Too many connections in /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php on line 144

Call Stack:
    0.0001     228152   1. {main}() /var/www/applications/map/htdocs/public/index.php:0
    0.0022     426672   2. Zend_Application->bootstrap() /var/www/applications/map/htdocs/public/index.php:32
    0.0022     426792   3. Zend_Application_Bootstrap_BootstrapAbstract->bootstrap() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Application.php:355
    0.0022     426880   4. Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Application/Bootstrap/BootstrapAbstract.php:598
    0.0069     891176   5. Zend_Application_Bootstrap_BootstrapAbstract->_executeResource() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Application/Bootstrap/BootstrapAbstract.php:634
    0.0069     891904   6. Bootstrap->_initView() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Application/Bootstrap/BootstrapAbstract.php:681
    0.0121    1136608   7. Zend_Db_Select->where() /var/www/applications/map/htdocs/application/Bootstrap.php:183
    0.0121    1136784   8. Zend_Db_Select->_where() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Select.php:475
    0.0121    1136840   9. Zend_Db_Adapter_Abstract->quoteInto() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Select.php:1005
    0.0121    1137152  10. Zend_Db_Adapter_Abstract->quote() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Abstract.php:931
    0.0121    1137224  11. Zend_Db_Adapter_Pdo_Mysql->_connect() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Abstract.php:861
    0.0121    1137488  12. Zend_Db_Adapter_Pdo_Abstract->_connect() /var/www/vhosts/hifi-forum.de/production/releases/20201218170910/vendor/zendframework/zendframework1/library/Zend/Db/Adapter/Pdo/Mysql.php:111