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

				SELECT TAG
				FROM b_cache_tag
				WHERE SITE_ID = 's1'
				AND CACHE_SALT = '/59d'
				AND RELATIVE_PATH = '/s1/bitrix/menu/06f'
			
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/data/taggedcache.php:51
#2: Bitrix\Main\Data\TaggedCache->initDbCache(string)
	/home/bitrix/www/bitrix/modules/main/lib/data/taggedcache.php:98
#3: Bitrix\Main\Data\TaggedCache->endTagCache()
	/home/bitrix/www/bitrix/modules/main/classes/general/cache.php:463
#4: CCacheManager->EndTagCache()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:1162
#5: CBitrixComponent->endResultCache()
	/home/bitrix/www/bitrix/components/bitrix/menu/component.php:108
#6: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:594
#7: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:102
#8: CBitrixComponent->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:638
#9: CBitrixComponent->includeComponent(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1041
#10: CAllMain->IncludeComponent(string, string, array)
	/home/bitrix/www/bitrix/templates/prohome/header.php:256
#11: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_after.php:96
#12: require(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:11
#13: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#14: require(string)
	/home/bitrix/www/catalog/index.php:2
#15: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#16: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2

Fatal error: Uncaught Bitrix\Main\DB\SqlQueryException: Mysql query error: (2006) MySQL server has gone away in /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137 Stack trace: #0 /home/bitrix/www/bitrix/modules/main/lib/db/mysqlcommonconnection.php(132): Bitrix\Main\DB\MysqliConnection->queryInternal('SELECT * FROM `...') #1 /home/bitrix/www/bitrix/modules/main/lib/db/connection.php(716): Bitrix\Main\DB\MysqlCommonConnection->getTableFields('b_sec_session') #2 /home/bitrix/www/bitrix/modules/main/lib/db/sqlhelper.php(387): Bitrix\Main\DB\Connection->getTableField('b_sec_session', 'SESSION_ID') #3 /home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php(974): Bitrix\Main\DB\SqlHelper->prepareAssignment('b_sec_session', 'SESSION_ID', 's6EZ0T60oPAScoR...') #4 /home/bitrix/www/bitrix/modules/security/classes/general/session_db.php(92): Bitrix\Main\Entity\DataManager::delete(Array) #5 [internal function]: CSecuritySessionDB::write('s6EZ0T60oPAScoR...', 'SESS_AUTH|a:1:{...') #6 [internal function]: sess in /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php on line 137