[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SET collation_connection = "utf8_unicode_ci"
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:146
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:327
#1: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:376
#2: Bitrix\Main\DB\Connection->queryExecute
	/home/bitrix/www/bitrix/php_interface/after_connect_d7.php:3
#3: include(string)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:1016
#4: Bitrix\Main\DB\Connection->afterConnected
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:101
#5: Bitrix\Main\DB\MysqliConnection->connectInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:128
#6: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:327
#7: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:355
#8: Bitrix\Main\DB\Connection->queryScalar
	/home/bitrix/www/bitrix/modules/main/lib/session/handlers/table/usersessiontable.php:116
#9: Bitrix\Main\Session\Handlers\Table\UserSessionTable::lock
	/home/bitrix/www/bitrix/modules/main/lib/session/handlers/databasesessionhandler.php:50
#10: Bitrix\Main\Session\Handlers\DatabaseSessionHandler->lock
	/home/bitrix/www/bitrix/modules/main/lib/session/handlers/abstractsessionhandler.php:54
#11: Bitrix\Main\Session\Handlers\AbstractSessionHandler->read
	
#12: session_start
	/home/bitrix/www/bitrix/modules/main/lib/session/session.php:162
#13: Bitrix\Main\Session\Session->start
	/home/bitrix/www/bitrix/modules/main/lib/session/kernelsessionproxy.php:47
#14: Bitrix\Main\Session\KernelSessionProxy->start
	/home/bitrix/www/bitrix/modules/main/include.php:159
#15: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#16: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#17: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#18: require(string)
	/home/bitrix/ext_www/aqvatorg.com/catalog/index.php:1
#19: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:184
#20: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2
----------