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

			SELECT 'x'
			FROM b_agent
			WHERE
				ACTIVE = 'Y'
				AND NEXT_EXEC <= NOW()
				AND (DATE_CHECK IS NULL OR DATE_CHECK <= NOW())
				 AND IS_PERIOD='Y' 
			LIMIT 1
		
/home/bitrix/www/bitrix/modules/main/lib/db/mysqlcommonconnection.php:417
#0: Bitrix\Main\DB\MysqlCommonConnection->createQueryException
	/home/bitrix/www/bitrix/modules/main/classes/general/database.php:683
#1: CAllDatabase->Query
	/home/bitrix/www/bitrix/modules/main/classes/general/agent.php:404
#2: CAgent::ExecuteAgents
	/home/bitrix/www/bitrix/modules/main/classes/general/agent.php:357
#3: CAgent::CheckAgents
	
#4: call_user_func_array
	/home/bitrix/www/bitrix/modules/main/lib/Application.php:915
#5: Bitrix\Main\Application->runBackgroundJobs
	/home/bitrix/www/bitrix/modules/main/lib/Application.php:430
#6: Bitrix\Main\Application->terminate
	/home/bitrix/www/bitrix/modules/main/lib/Application.php:382
#7: Bitrix\Main\Application->end
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3711
#8: CMain::FinalActions
	/home/bitrix/www/bitrix/modules/main/include/epilog_after.php:61
#9: require(string)
	/home/bitrix/www/bitrix/modules/main/include/epilog.php:3
#10: require_once(string)
	/home/bitrix/www/bitrix/footer.php:4
#11: require(string)
	/home/bitrix/www/catalog/index.php:894
#12: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:128
#13: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2
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