PDOException: SQLSTATE[HY000] [2002] Connection refused 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/framework/DB/Adapter/Pdo/Mysql.php(589): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#4 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(627): Magento\Framework\DB\Adapter\Pdo\Mysql->_query()
#5 /var/www/html/generated/code/Firebear/ImportExport/Setup/Db/Adapter/Pdo/Mysql/Interceptor.php(95): Magento\Framework\DB\Adapter\Pdo\Mysql->query()
#6 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(794): Firebear\ImportExport\Setup\Db\Adapter\Pdo\Mysql\Interceptor->query()
#7 /var/www/html/generated/code/Firebear/ImportExport/Setup/Db/Adapter/Pdo/Mysql/Interceptor.php(1112): Zend_Db_Adapter_Abstract->fetchCol()
#8 /var/www/html/vendor/magento/framework/Model/ResourceModel/Db/Collection/AbstractCollection.php(503): Firebear\ImportExport\Setup\Db\Adapter\Pdo\Mysql\Interceptor->fetchCol()
#9 /var/www/html/vendor/amasty/groupcat/Model/ResourceModel/Rule/Collection.php(292): Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection->getAllIds()
#10 /var/www/html/generated/code/Amasty/Groupcat/Model/ResourceModel/Rule/Collection/Interceptor.php(104): Amasty\Groupcat\Model\ResourceModel\Rule\Collection->getAllIds()
#11 /var/www/html/vendor/amasty/groupcat/Plugin/Framework/App/Http/Context.php(46): Amasty\Groupcat\Model\ResourceModel\Rule\Collection\Interceptor->getAllIds()
#12 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(121): Amasty\Groupcat\Plugin\Framework\App\Http\Context->beforeGetVaryString()
#13 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Context\Interceptor->Magento\Framework\Interception\{closure}()
#14 /var/www/html/generated/code/Magento/Framework/App/Http/Context/Interceptor.php(59): Magento\Framework\App\Http\Context\Interceptor->___callPlugins()
#15 /var/www/html/vendor/magento/framework/App/Response/Http.php(108): Magento\Framework\App\Http\Context\Interceptor->getVaryString()
#16 /var/www/html/generated/code/Magento/Framework/App/Response/Http/Interceptor.php(32): Magento\Framework\App\Response\Http->sendVary()
#17 /var/www/html/vendor/magento/module-page-cache/Model/App/Response/HttpPlugin.php(29): Magento\Framework\App\Response\Http\Interceptor->sendVary()
#18 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(121): Magento\PageCache\Model\App\Response\HttpPlugin->beforeSendResponse()
#19 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Response\Http\Interceptor->Magento\Framework\Interception\{closure}()
#20 /var/www/html/generated/code/Magento/Framework/App/Response/Http/Interceptor.php(86): Magento\Framework\App\Response\Http\Interceptor->___callPlugins()
#21 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(103): Magento\Framework\App\Response\Http\Interceptor->sendResponse()
#22 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(70): Magento\Framework\App\ExceptionHandler->handleDeveloperMode()
#23 /var/www/html/vendor/magento/framework/App/Http.php(156): Magento\Framework\App\ExceptionHandler->handle()
#24 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Http->catchException()
#25 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\App\Http\Interceptor->___callParent()
#26 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}()
#27 /var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php(32): Magento\Framework\App\Http\Interceptor->___callPlugins()
#28 /var/www/html/vendor/magento/framework/App/Bootstrap.php(269): Magento\Framework\App\Http\Interceptor->catchException()
#29 /var/www/html/pub/index.php(29): Magento\Framework\App\Bootstrap->run()
#30 {main}

Next Zend_Db_Adapter_Exception: SQLSTATE[HY000] [2002] Connection refused 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/framework/DB/Adapter/Pdo/Mysql.php(589): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#3 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(627): Magento\Framework\DB\Adapter\Pdo\Mysql->_query()
#4 /var/www/html/generated/code/Firebear/ImportExport/Setup/Db/Adapter/Pdo/Mysql/Interceptor.php(95): Magento\Framework\DB\Adapter\Pdo\Mysql->query()
#5 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(794): Firebear\ImportExport\Setup\Db\Adapter\Pdo\Mysql\Interceptor->query()
#6 /var/www/html/generated/code/Firebear/ImportExport/Setup/Db/Adapter/Pdo/Mysql/Interceptor.php(1112): Zend_Db_Adapter_Abstract->fetchCol()
#7 /var/www/html/vendor/magento/framework/Model/ResourceModel/Db/Collection/AbstractCollection.php(503): Firebear\ImportExport\Setup\Db\Adapter\Pdo\Mysql\Interceptor->fetchCol()
#8 /var/www/html/vendor/amasty/groupcat/Model/ResourceModel/Rule/Collection.php(292): Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection->getAllIds()
#9 /var/www/html/generated/code/Amasty/Groupcat/Model/ResourceModel/Rule/Collection/Interceptor.php(104): Amasty\Groupcat\Model\ResourceModel\Rule\Collection->getAllIds()
#10 /var/www/html/vendor/amasty/groupcat/Plugin/Framework/App/Http/Context.php(46): Amasty\Groupcat\Model\ResourceModel\Rule\Collection\Interceptor->getAllIds()
#11 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(121): Amasty\Groupcat\Plugin\Framework\App\Http\Context->beforeGetVaryString()
#12 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Context\Interceptor->Magento\Framework\Interception\{closure}()
#13 /var/www/html/generated/code/Magento/Framework/App/Http/Context/Interceptor.php(59): Magento\Framework\App\Http\Context\Interceptor->___callPlugins()
#14 /var/www/html/vendor/magento/framework/App/Response/Http.php(108): Magento\Framework\App\Http\Context\Interceptor->getVaryString()
#15 /var/www/html/generated/code/Magento/Framework/App/Response/Http/Interceptor.php(32): Magento\Framework\App\Response\Http->sendVary()
#16 /var/www/html/vendor/magento/module-page-cache/Model/App/Response/HttpPlugin.php(29): Magento\Framework\App\Response\Http\Interceptor->sendVary()
#17 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(121): Magento\PageCache\Model\App\Response\HttpPlugin->beforeSendResponse()
#18 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Response\Http\Interceptor->Magento\Framework\Interception\{closure}()
#19 /var/www/html/generated/code/Magento/Framework/App/Response/Http/Interceptor.php(86): Magento\Framework\App\Response\Http\Interceptor->___callPlugins()
#20 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(103): Magento\Framework\App\Response\Http\Interceptor->sendResponse()
#21 /var/www/html/vendor/magento/framework/App/ExceptionHandler.php(70): Magento\Framework\App\ExceptionHandler->handleDeveloperMode()
#22 /var/www/html/vendor/magento/framework/App/Http.php(156): Magento\Framework\App\ExceptionHandler->handle()
#23 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Http->catchException()
#24 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\App\Http\Interceptor->___callParent()
#25 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\Http\Interceptor->Magento\Framework\Interception\{closure}()
#26 /var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php(32): Magento\Framework\App\Http\Interceptor->___callPlugins()
#27 /var/www/html/vendor/magento/framework/App/Bootstrap.php(269): Magento\Framework\App\Http\Interceptor->catchException()
#28 /var/www/html/pub/index.php(29): Magento\Framework\App\Bootstrap->run()
#29 {main}