[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)

				SELECT TAG
				FROM b_cache_tag
				WHERE SITE_ID = 'is'
				AND CACHE_SALT = '/f3e'
				AND RELATIVE_PATH = '/is/bitrix/menu/06f'
			
/var/www/ak-cent/htdocs/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/ak-cent/htdocs/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/ak-cent/htdocs/bitrix/modules/main/lib/data/taggedcache.php:51
#2: Bitrix\Main\Data\TaggedCache->initDbCache(string)
	/var/www/ak-cent/htdocs/bitrix/modules/main/lib/data/taggedcache.php:98
#3: Bitrix\Main\Data\TaggedCache->endTagCache()
	/var/www/ak-cent/htdocs/bitrix/modules/main/classes/general/cache.php:463
#4: CCacheManager->EndTagCache()
	/var/www/ak-cent/htdocs/bitrix/modules/main/classes/general/component.php:1162
#5: CBitrixComponent->endResultCache()
	/var/www/ak-cent/htdocs/bitrix/components/bitrix/menu/component.php:109
#6: include(string)
	/var/www/ak-cent/htdocs/bitrix/modules/main/classes/general/component.php:594
#7: CBitrixComponent->__includeComponent()
	/var/www/ak-cent/htdocs/bitrix/modules/main/classes/general/component.php:102
#8: CBitrixComponent->executeComponent()
	/var/www/ak-cent/htdocs/bitrix/modules/main/classes/general/component.php:638
#9: CBitrixComponent->includeComponent(string, array, boolean)
	/var/www/ak-cent/htdocs/bitrix/modules/main/classes/general/main.php:1037
#10: CAllMain->IncludeComponent(string, string, array, boolean)
	/var/www/ak-cent/htdocs/bitrix/templates/adaptiv_shop/header.php:277
#11: include_once(string)
	/var/www/ak-cent/htdocs/bitrix/modules/main/include/prolog_after.php:96
#12: require(string)
	/var/www/ak-cent/htdocs/bitrix/modules/main/include/prolog.php:11
#13: require_once(string)
	/var/www/ak-cent/htdocs/bitrix/header.php:1
#14: require(string)
	/var/www/itsklad/htdocs/catalog/index.php:3
#15: include_once(string)
	/var/www/ak-cent/htdocs/bitrix/modules/main/include/urlrewrite.php:159
#16: include_once(string)
	/var/www/ak-cent/htdocs/bitrix/urlrewrite.php:2

Fatal error: Uncaught Bitrix\Main\DB\ConnectionException: Mysql connect error [127.0.0.1]: (2002) Connection refused in /var/www/ak-cent/htdocs/bitrix/modules/main/lib/db/mysqliconnection.php:65 Stack trace: #0 /var/www/ak-cent/htdocs/bitrix/modules/main/lib/db/mysqliconnection.php(122): Bitrix\Main\DB\MysqliConnection->connectInternal() #1 /var/www/ak-cent/htdocs/bitrix/modules/main/lib/db/connection.php(330): Bitrix\Main\DB\MysqliConnection->queryInternal('SHOW TABLES LIK...', Array, NULL) #2 /var/www/ak-cent/htdocs/bitrix/modules/security/classes/mysql/database.php(118): Bitrix\Main\DB\Connection->query('SHOW TABLES LIK...') #3 /var/www/ak-cent/htdocs/bitrix/modules/security/classes/mysql/database.php(53): CSecurityDB::Query('SHOW TABLES LIK...', 'Module: securit...') #4 /var/www/ak-cent/htdocs/bitrix/modules/security/classes/mysql/database.php(110): CSecurityDB::Init(true) #5 /var/www/ak-cent/htdocs/bitrix/modules/security/classes/general/antivirus.php(441): CSecurityDB::Query('SELECT * FROM b...', 'Module: securit... in /var/www/ak-cent/htdocs/bitrix/modules/main/lib/db/mysqliconnection.php on line 65