Exception (Database Exception) 'yii\db\Exception' with message 'SQLSTATE[08006] [7] timeout expired'

in /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/Connection.php:320

Stack trace:
#0 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/Schema.php(353): yii\db\Connection->open()
#1 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/Connection.php(485): yii\db\Schema->quoteValue('users')
#2 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/pgsql/Schema.php(307): yii\db\Connection->quoteValue('users')
#3 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/pgsql/Schema.php(124): yii\db\pgsql\Schema->findColumns(Object(yii\db\TableSchema))
#4 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/Schema.php(117): yii\db\pgsql\Schema->loadTableSchema('adm.users')
#5 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/Connection.php(462): yii\db\Schema->getTableSchema('adm.users', false)
#6 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/ActiveRecord.php(272): yii\db\Connection->getTableSchema('adm.users')
#7 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/ActiveRecord.php(295): yii\db\ActiveRecord::getTableSchema()
#8 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/db/BaseActiveRecord.php(110): yii\db\ActiveRecord::primaryKey()
#9 /opt/www/cms2/fb/pr/common/models/User.php(75): yii\db\BaseActiveRecord::find('19')
#10 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/web/User.php(549): common\models\User::findIdentity('19')
#11 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/web/User.php(153): yii\web\User->renewAuthStatus()
#12 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/base/Component.php(129): yii\web\User->getIdentity()
#13 /opt/www/cms2/fb/pr/frontend/controllers/ApiController.php(578): yii\base\Component->__get('identity')
#14 /opt/www/cms2/fb/pr/frontend/controllers/ApiController.php(631): frontend\controllers\ApiController->prepareData()
#15 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/base/Module.php(545): frontend\controllers\ApiController->__construct('api', Object(yii\web\Application))
#16 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/base/Module.php(501): yii\base\Module->createControllerByID('api')
#17 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/base/Module.php(428): yii\base\Module->createController('api/get/')
#18 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/web/Application.php(84): yii\base\Module->runAction('api/get/', Array)
#19 /opt/www/cms2/fb/pr/vendor/yiisoft/yii2/base/Application.php(339): yii\web\Application->handleRequest(Object(yii\web\Request))
#20 /opt/www/cms2/fb/pr/frontend/web/index.php(50): yii\base\Application->run()
#21 {main}