Error #2, Packets out of order. Expected 0 received 1. Packet size=23 - in /var/framework/lib/Database/PdoConnector.php at line 45

Error #2, PDO::__construct(): MySQL server has gone away - in /var/framework/lib/Database/PdoConnector.php at line 45

Error #2, PDO::__construct(): Error while reading greeting packet. PID=59838 - in /var/framework/lib/Database/PdoConnector.php at line 45

exception 'Database\PdoConnectionConnectException' with message 'SQLSTATE[HY000] [2006] MySQL server has gone away' in /var/framework/lib/Database/PdoConnector.php:52
Stack trace:
#0 /var/framework/lib/Database/PdoAdapter.php(60): Database\PdoConnector->doConnect()
#1 /var/framework/lib/Database/PdoAdapter.php(82): Database\PdoAdapter->connect()
#2 /var/framework/lib/Model/Mapper/AbstractDataMapper.php(223): Database\PdoAdapter->prepare('DESCRIBE `artic...')
#3 /var/framework/lib/Model/Mapper/AbstractDataMapper.php(233): Model\Mapper\AbstractDataMapper->fetchTableColumns('articles')
#4 /var/framework/lib/Model/Mapper/AbstractDataMapper.php(242): Model\Mapper\AbstractDataMapper->fetchColumns()
#5 /var/framework/lib/Model/Mapper/AbstractDataMapper.php(253): Model\Mapper\AbstractDataMapper->getColumns()
#6 /var/framework/lib/Model/Mapper/AbstractDataMapper.php(189): Model\Mapper\AbstractDataMapper->hasColumn('language')
#7 /var/framework/lib/Model/Mapper/AbstractDataMapper.php(178): Model\Mapper\AbstractDataMapper->setLanguageFilterOn()
#8 /var/www/app/lib/Model/Mapper/PublicationMapper.php(18): Model\Mapper\AbstractDataMapper->setLanguageCode('uk_UA')
#9 /var/framework/lib/Model/Mapper/DataMapper.php(22): Model\Mapper\PublicationMapper->init()
#10 /var/framework/lib/Model/Mapper/DataMapperFactory.php(44): Model\Mapper\DataMapper->__construct('articles', 'Article')
#11 /var/www/app/controllers/Articles.php(27): Model\Mapper\DataMapperFactory::factory('Publication', 'articles', 'Article')
#12 /var/framework/lib/Core/Dispatcher.php(23): Articles->__construct()
#13 /var/framework/lib/Core/Application.php(95): Core\Dispatcher->dispatch(Object(Core\Route))
#14 /var/www/public/index.php(55): Core\Application->run()
#15 {main}