PDOException: SQLSTATE[08004] [1040] Too many connections in /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:128
Stack trace:
#0 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php(128): PDO->__construct()
#1 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Mysql.php(111): Zend_Db_Adapter_Pdo_Abstract->_connect()
#2 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(424): Zend_Db_Adapter_Pdo_Mysql->_connect()
#3 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(460): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#4 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query()
#5 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(560): Zend_Db_Adapter_Pdo_Abstract->query()
#6 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(627): Magento\Framework\DB\Adapter\Pdo\Mysql->_query()
#7 /var/www/html/generated/code/Magento/Framework/DB/Adapter/Pdo/Mysql/Interceptor.php(95): Magento\Framework\DB\Adapter\Pdo\Mysql->query()
#8 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(737): Magento\Framework\DB\Adapter\Pdo\Mysql\Interceptor->query()
#9 /var/www/html/generated/code/Magento/Framework/DB/Adapter/Pdo/Mysql/Interceptor.php(1085): Zend_Db_Adapter_Abstract->fetchAll()
#10 /var/www/html/vendor/magento/framework/Data/Collection/Db/FetchStrategy/Query.php(21): Magento\Framework\DB\Adapter\Pdo\Mysql\Interceptor->fetchAll()
#11 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(782): Magento\Framework\Data\Collection\Db\FetchStrategy\Query->fetchAll()
#12 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(677): Magento\Framework\Data\Collection\AbstractDb->_fetchAll()
#13 /var/www/html/generated/code/Magento/Config/Model/ResourceModel/Config/Data/Collection/Interceptor.php(347): Magento\Framework\Data\Collection\AbstractDb->getData()
#14 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(580): Magento\Config\Model\ResourceModel\Config\Data\Collection\Interceptor->getData()
#15 /var/www/html/generated/code/Magento/Config/Model/ResourceModel/Config/Data/Collection/Interceptor.php(329): Magento\Framework\Data\Collection\AbstractDb->loadWithFilter()
#16 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(565): Magento\Config\Model\ResourceModel\Config\Data\Collection\Interceptor->loadWithFilter()
#17 /var/www/html/generated/code/Magento/Config/Model/ResourceModel/Config/Data/Collection/Interceptor.php(320): Magento\Framework\Data\Collection\AbstractDb->load()
#18 /var/www/html/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(89): Magento\Config\Model\ResourceModel\Config\Data\Collection\Interceptor->load()
#19 /var/www/html/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(72): Magento\Config\App\Config\Source\RuntimeConfigSource->loadConfig()
#20 /var/www/html/vendor/magento/framework/App/Config/ConfigSourceAggregated.php(42): Magento\Config\App\Config\Source\RuntimeConfigSource->get()
#21 /var/www/html/vendor/magento/module-config/App/Config/Type/System/Reader.php(60): Magento\Framework\App\Config\ConfigSourceAggregated->get()
#22 /var/www/html/generated/code/Magento/Config/App/Config/Type/System/Reader/Proxy.php(95): Magento\Config\App\Config\Type\System\Reader->read()
#23 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(395): Magento\Config\App\Config\Type\System\Reader\Proxy->read()
#24 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(265): Magento\Config\App\Config\Type\System->readData()
#25 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(207): Magento\Config\App\Config\Type\System->loadDefaultScopeData()
#26 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(181): Magento\Config\App\Config\Type\System->getWithParts()
#27 /var/www/html/vendor/magento/framework/App/Config.php(132): Magento\Config\App\Config\Type\System->get()
#28 /var/www/html/vendor/magento/framework/App/Config.php(80): Magento\Framework\App\Config->get()
#29 /var/www/html/vendor/magento/framework/App/Config.php(93): Magento\Framework\App\Config->getValue()
#30 /var/www/html/vendor/magento/module-new-relic-reporting/Model/Config.php(94): Magento\Framework\App\Config->isSetFlag()
#31 /var/www/html/vendor/magento/module-new-relic-reporting/Plugin/HttpPlugin.php(49): Magento\NewRelicReporting\Model\Config->isNewRelicEnabled()
#32 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(121): Magento\NewRelicReporting\Plugin\HttpPlugin->beforeCatchException()
#33 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}()
#34 /var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php(32): Magento\Framework\App\Http\Interceptor->___callPlugins()
#35 /var/www/html/vendor/magento/framework/App/Bootstrap.php(269): Magento\Framework\App\Http\Interceptor->catchException()
#36 /var/www/html/pub/index.php(36): Magento\Framework\App\Bootstrap->run()
#37 {main}

Next Zend_Db_Adapter_Exception: SQLSTATE[08004] [1040] Too many connections in /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:144
Stack trace:
#0 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Mysql.php(111): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(424): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(460): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#3 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query()
#4 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(560): Zend_Db_Adapter_Pdo_Abstract->query()
#5 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(627): Magento\Framework\DB\Adapter\Pdo\Mysql->_query()
#6 /var/www/html/generated/code/Magento/Framework/DB/Adapter/Pdo/Mysql/Interceptor.php(95): Magento\Framework\DB\Adapter\Pdo\Mysql->query()
#7 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(737): Magento\Framework\DB\Adapter\Pdo\Mysql\Interceptor->query()
#8 /var/www/html/generated/code/Magento/Framework/DB/Adapter/Pdo/Mysql/Interceptor.php(1085): Zend_Db_Adapter_Abstract->fetchAll()
#9 /var/www/html/vendor/magento/framework/Data/Collection/Db/FetchStrategy/Query.php(21): Magento\Framework\DB\Adapter\Pdo\Mysql\Interceptor->fetchAll()
#10 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(782): Magento\Framework\Data\Collection\Db\FetchStrategy\Query->fetchAll()
#11 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(677): Magento\Framework\Data\Collection\AbstractDb->_fetchAll()
#12 /var/www/html/generated/code/Magento/Config/Model/ResourceModel/Config/Data/Collection/Interceptor.php(347): Magento\Framework\Data\Collection\AbstractDb->getData()
#13 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(580): Magento\Config\Model\ResourceModel\Config\Data\Collection\Interceptor->getData()
#14 /var/www/html/generated/code/Magento/Config/Model/ResourceModel/Config/Data/Collection/Interceptor.php(329): Magento\Framework\Data\Collection\AbstractDb->loadWithFilter()
#15 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(565): Magento\Config\Model\ResourceModel\Config\Data\Collection\Interceptor->loadWithFilter()
#16 /var/www/html/generated/code/Magento/Config/Model/ResourceModel/Config/Data/Collection/Interceptor.php(320): Magento\Framework\Data\Collection\AbstractDb->load()
#17 /var/www/html/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(89): Magento\Config\Model\ResourceModel\Config\Data\Collection\Interceptor->load()
#18 /var/www/html/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(72): Magento\Config\App\Config\Source\RuntimeConfigSource->loadConfig()
#19 /var/www/html/vendor/magento/framework/App/Config/ConfigSourceAggregated.php(42): Magento\Config\App\Config\Source\RuntimeConfigSource->get()
#20 /var/www/html/vendor/magento/module-config/App/Config/Type/System/Reader.php(60): Magento\Framework\App\Config\ConfigSourceAggregated->get()
#21 /var/www/html/generated/code/Magento/Config/App/Config/Type/System/Reader/Proxy.php(95): Magento\Config\App\Config\Type\System\Reader->read()
#22 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(395): Magento\Config\App\Config\Type\System\Reader\Proxy->read()
#23 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(265): Magento\Config\App\Config\Type\System->readData()
#24 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(207): Magento\Config\App\Config\Type\System->loadDefaultScopeData()
#25 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(181): Magento\Config\App\Config\Type\System->getWithParts()
#26 /var/www/html/vendor/magento/framework/App/Config.php(132): Magento\Config\App\Config\Type\System->get()
#27 /var/www/html/vendor/magento/framework/App/Config.php(80): Magento\Framework\App\Config->get()
#28 /var/www/html/vendor/magento/framework/App/Config.php(93): Magento\Framework\App\Config->getValue()
#29 /var/www/html/vendor/magento/module-new-relic-reporting/Model/Config.php(94): Magento\Framework\App\Config->isSetFlag()
#30 /var/www/html/vendor/magento/module-new-relic-reporting/Plugin/HttpPlugin.php(49): Magento\NewRelicReporting\Model\Config->isNewRelicEnabled()
#31 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(121): Magento\NewRelicReporting\Plugin\HttpPlugin->beforeCatchException()
#32 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}()
#33 /var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php(32): Magento\Framework\App\Http\Interceptor->___callPlugins()
#34 /var/www/html/vendor/magento/framework/App/Bootstrap.php(269): Magento\Framework\App\Http\Interceptor->catchException()
#35 /var/www/html/pub/index.php(36): Magento\Framework\App\Bootstrap->run()
#36 {main}