sale2 exception(s):
Exception #0 (Zend_Db_Adapter_Exception): SQLSTATE[HY000] [1040] Too many connections
Exception #1 (PDOException): SQLSTATE[HY000] [1040] Too many connections

Exception #0 (Zend_Db_Adapter_Exception): SQLSTATE[HY000] [1040] Too many connections
<pre>#1 Zend_Db_Adapter_Pdo_Mysql->_connect() called at [vendor/magento/framework/DB/Adapter/Pdo/Mysql.php:424]
#2 Magento\Framework\DB\Adapter\Pdo\Mysql->_connect() called at [vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php:460]
#3 Zend_Db_Adapter_Abstract->query() called at [vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:238]
#4 Zend_Db_Adapter_Pdo_Abstract->query() called at [vendor/magento/framework/DB/Adapter/Pdo/Mysql.php:560]
#5 Magento\Framework\DB\Adapter\Pdo\Mysql->_query() called at [vendor/magento/framework/DB/Adapter/Pdo/Mysql.php:627]
#6 Magento\Framework\DB\Adapter\Pdo\Mysql->query() called at [generated/code/Magento/Framework/DB/Adapter/Pdo/Mysql/Interceptor.php:95]
#7 Magento\Framework\DB\Adapter\Pdo\Mysql\Interceptor->query() called at [vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php:737]
#8 Zend_Db_Adapter_Abstract->fetchAll() called at [generated/code/Magento/Framework/DB/Adapter/Pdo/Mysql/Interceptor.php:1085]
#9 Magento\Framework\DB\Adapter\Pdo\Mysql\Interceptor->fetchAll() called at [vendor/magento/module-store/App/Config/Source/RuntimeConfigSource.php:101]
#10 Magento\Store\App\Config\Source\RuntimeConfigSource->getEntities() called at [vendor/magento/module-store/App/Config/Source/RuntimeConfigSource.php:61]
#11 Magento\Store\App\Config\Source\RuntimeConfigSource->get() called at [vendor/magento/framework/App/Config/ConfigSourceAggregated.php:42]
#12 Magento\Framework\App\Config\ConfigSourceAggregated->get() called at [generated/code/Magento/Framework/App/Config/ConfigSourceAggregated/Proxy.php:95]
#13 Magento\Framework\App\Config\ConfigSourceAggregated\Proxy->get() called at [vendor/magento/module-store/App/Config/Type/Scopes.php:63]
#14 Magento\Store\App\Config\Type\Scopes->get() called at [vendor/magento/framework/App/Config.php:132]
#15 Magento\Framework\App\Config->get() called at [vendor/magento/module-store/Model/StoreRepository.php:69]
#16 Magento\Store\Model\StoreRepository->get() called at [vendor/magento/module-store/Model/StoreManager.php:171]
#17 Magento\Store\Model\StoreManager->getStore() called at [app/code/Mageplaza/SeoUrl/App/Request/StorePathInfoProcessor.php:64]
#18 Mageplaza\SeoUrl\App\Request\StorePathInfoProcessor->process() called at [app/code/Mageplaza/SeoUrl/App/Request/PathInfoProcessor.php:66]
#19 Mageplaza\SeoUrl\App\Request\PathInfoProcessor->process() called at [generated/code/Mageplaza/SeoUrl/App/Request/PathInfoProcessor/Proxy.php:95]
#20 Mageplaza\SeoUrl\App\Request\PathInfoProcessor\Proxy->process() called at [app/code/Mageplaza/SeoUrl/App/Request/BackendPathInfoProcessor.php:72]
#21 Mageplaza\SeoUrl\App\Request\BackendPathInfoProcessor->process() called at [generated/code/Magento/Backend/App/Request/PathInfoProcessor/Proxy.php:95]
#22 Magento\Backend\App\Request\PathInfoProcessor\Proxy->process() called at [vendor/magento/framework/App/Request/Http.php:148]
#23 Magento\Framework\App\Request\Http->getOriginalPathInfo() called at [vendor/magento/framework/App/Request/Http.php:163]
#24 Magento\Framework\App\Request\Http->getPathInfo() called at [vendor/magento/framework/App/Request/Http.php:213]
#25 Magento\Framework\App\Request\Http->getFrontName() called at [vendor/magento/framework/App/Http.php:111]
#26 Magento\Framework\App\Http->launch() called at [generated/code/Magento/Framework/App/Http/Interceptor.php:23]
#27 Magento\Framework\App\Http\Interceptor->launch() called at [vendor/magento/framework/App/Bootstrap.php:263]
#28 Magento\Framework\App\Bootstrap->run() called at [pub/index.php:29]
</pre>

Exception #1 (PDOException): SQLSTATE[HY000] [1040] Too many connections
<pre>#1 Zend_Db_Adapter_Pdo_Abstract->_connect() called at [vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Mysql.php:111]
#2 Zend_Db_Adapter_Pdo_Mysql->_connect() called at [vendor/magento/framework/DB/Adapter/Pdo/Mysql.php:424]
#3 Magento\Framework\DB\Adapter\Pdo\Mysql->_connect() called at [vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php:460]
#4 Zend_Db_Adapter_Abstract->query() called at [vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:238]
#5 Zend_Db_Adapter_Pdo_Abstract->query() called at [vendor/magento/framework/DB/Adapter/Pdo/Mysql.php:560]
#6 Magento\Framework\DB\Adapter\Pdo\Mysql->_query() called at [vendor/magento/framework/DB/Adapter/Pdo/Mysql.php:627]
#7 Magento\Framework\DB\Adapter\Pdo\Mysql->query() called at [generated/code/Magento/Framework/DB/Adapter/Pdo/Mysql/Interceptor.php:95]
#8 Magento\Framework\DB\Adapter\Pdo\Mysql\Interceptor->query() called at [vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php:737]
#9 Zend_Db_Adapter_Abstract->fetchAll() called at [generated/code/Magento/Framework/DB/Adapter/Pdo/Mysql/Interceptor.php:1085]
#10 Magento\Framework\DB\Adapter\Pdo\Mysql\Interceptor->fetchAll() called at [vendor/magento/module-store/App/Config/Source/RuntimeConfigSource.php:101]
#11 Magento\Store\App\Config\Source\RuntimeConfigSource->getEntities() called at [vendor/magento/module-store/App/Config/Source/RuntimeConfigSource.php:61]
#12 Magento\Store\App\Config\Source\RuntimeConfigSource->get() called at [vendor/magento/framework/App/Config/ConfigSourceAggregated.php:42]
#13 Magento\Framework\App\Config\ConfigSourceAggregated->get() called at [generated/code/Magento/Framework/App/Config/ConfigSourceAggregated/Proxy.php:95]
#14 Magento\Framework\App\Config\ConfigSourceAggregated\Proxy->get() called at [vendor/magento/module-store/App/Config/Type/Scopes.php:63]
#15 Magento\Store\App\Config\Type\Scopes->get() called at [vendor/magento/framework/App/Config.php:132]
#16 Magento\Framework\App\Config->get() called at [vendor/magento/module-store/Model/StoreRepository.php:69]
#17 Magento\Store\Model\StoreRepository->get() called at [vendor/magento/module-store/Model/StoreManager.php:171]
#18 Magento\Store\Model\StoreManager->getStore() called at [app/code/Mageplaza/SeoUrl/App/Request/StorePathInfoProcessor.php:64]
#19 Mageplaza\SeoUrl\App\Request\StorePathInfoProcessor->process() called at [app/code/Mageplaza/SeoUrl/App/Request/PathInfoProcessor.php:66]
#20 Mageplaza\SeoUrl\App\Request\PathInfoProcessor->process() called at [generated/code/Mageplaza/SeoUrl/App/Request/PathInfoProcessor/Proxy.php:95]
#21 Mageplaza\SeoUrl\App\Request\PathInfoProcessor\Proxy->process() called at [app/code/Mageplaza/SeoUrl/App/Request/BackendPathInfoProcessor.php:72]
#22 Mageplaza\SeoUrl\App\Request\BackendPathInfoProcessor->process() called at [generated/code/Magento/Backend/App/Request/PathInfoProcessor/Proxy.php:95]
#23 Magento\Backend\App\Request\PathInfoProcessor\Proxy->process() called at [vendor/magento/framework/App/Request/Http.php:148]
#24 Magento\Framework\App\Request\Http->getOriginalPathInfo() called at [vendor/magento/framework/App/Request/Http.php:163]
#25 Magento\Framework\App\Request\Http->getPathInfo() called at [vendor/magento/framework/App/Request/Http.php:213]
#26 Magento\Framework\App\Request\Http->getFrontName() called at [vendor/magento/framework/App/Http.php:111]
#27 Magento\Framework\App\Http->launch() called at [generated/code/Magento/Framework/App/Http/Interceptor.php:23]
#28 Magento\Framework\App\Http\Interceptor->launch() called at [vendor/magento/framework/App/Bootstrap.php:263]
#29 Magento\Framework\App\Bootstrap->run() called at [pub/index.php:29]
</pre>