[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (2006) MySQL server has gone away (400)
/home/web/ria34.ru/www/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/home/web/ria34.ru/www/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/web/ria34.ru/www/bitrix/modules/main/lib/db/connection.php:329
#2: Bitrix\Main\DB\Connection->query(string)
	/home/web/ria34.ru/www/bitrix/modules/security/classes/mysql/database.php:118
#3: CSecurityDB::Query(string, string)
	/home/web/ria34.ru/www/bitrix/modules/security/classes/mysql/database.php:53
#4: CSecurityDB::Init(boolean)
	/home/web/ria34.ru/www/bitrix/modules/security/classes/mysql/database.php:110
#5: CSecurityDB::Query(string, string)
	/home/web/ria34.ru/www/bitrix/modules/security/classes/mysql/database.php:181
#6: CSecurityDB::LockTable(string, string)
	/home/web/ria34.ru/www/bitrix/modules/security/classes/general/antivirus.php:160
#7: CSecurityAntiVirus::OnPageStart()
	/home/web/ria34.ru/www/bitrix/modules/main/classes/general/module.php:490
#8: ExecuteModuleEventEx(array)
	/home/web/ria34.ru/www/bitrix/modules/main/include.php:269
#9: require_once(string)
	/home/web/ria34.ru/www/bitrix/modules/main/include/prolog_before.php:14
#10: require_once(string)
	/home/web/ria34.ru/www/bitrix/modules/main/include/prolog.php:10
#11: require_once(string)
	/home/web/ria34.ru/www/bitrix/header.php:1
#12: require(string)
	/home/web/ria34.ru/www/notices/immovable/index.php:2
#13: include_once(string)
	/home/web/ria34.ru/www/bitrix/modules/main/include/urlrewrite.php:159
#14: include_once(string)
	/home/web/ria34.ru/www/bitrix/urlrewrite.php:2