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

					SELECT
						F.FACET_ID
						,F.VALUE
						,MIN(F.VALUE_NUM) MIN_VALUE_NUM
						,MAX(F.VALUE_NUM) MAX_VALUE_NUM
						,MAX(case when LOCATE('.', F.VALUE_NUM) > 0 then LENGTH(SUBSTRING_INDEX(F.VALUE_NUM, '.', -1)) else 0 end) VALUE_FRAC_LEN
						,COUNT(DISTINCT F.ELEMENT_ID) ELEMENT_COUNT
					FROM
						
			b_iblock B
			INNER JOIN b_lang L ON B.LID=L.LID
			INNER JOIN b_iblock_element BE ON BE.IBLOCK_ID = B.ID
			left join b_catalog_product as PRD on (PRD.ID = BE.ID)

		
							INNER JOIN b_iblock_27_index F ON BE.ID = F.ELEMENT_ID
					WHERE
						F.SECTION_ID = 209
						and F.FACET_ID in (542,572,548,546,462,123)
						
			AND (
			
				(((BE.ACTIVE_TO >= now() OR BE.ACTIVE_TO IS NULL) AND (BE.ACTIVE_FROM <= now() OR BE.ACTIVE_FROM IS NULL)))
				AND ((((BE.IBLOCK_ID = '27'))))
				AND ((((PRD.AVAILABLE='Y'))))
			)
			AND (((BE.WF_STATUS_ID=1 AND BE.WF_PARENT_ELEMENT_ID IS NULL)))
			AND ((
				B.ID IN (
			SELECT IBLOCK_ID
			FROM b_iblock_group IBG
			WHERE IBG.GROUP_ID IN (2)
			AND IBG.PERMISSION >= 'R'
		
				AND (IBG.PERMISSION='X' OR B.ACTIVE='Y')
			)
				OR (B.RIGHTS_MODE = 'E' AND EXISTS (
				SELECT ER.ELEMENT_ID
				FROM b_iblock_element_right ER
				INNER JOIN b_iblock_right IBR ON IBR.ID = ER.RIGHT_ID
				INNER JOIN b_user_access UA ON UA.ACCESS_CODE = IBR.GROUP_CODE AND UA.USER_ID = 0
				WHERE ER.ELEMENT_ID = BE.ID
				AND IBR.OP_EREAD = 'Y'
				
			))
			))
					GROUP BY
						F.FACET_ID, F.VALUE
				
/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/iblock/lib/propertyindex/facet.php:340
#2: Bitrix\Iblock\PropertyIndex\Facet->query(array)
	/home/bitrix/www/bitrix/components/bitrix/catalog.smart.filter/component.php:62
#3: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#4: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:103
#5: CBitrixComponent->executeComponent()
	/home/bitrix/www/bitrix/components/bitrix/catalog.smart.filter/class.php:138
#6: CBitrixCatalogSmartFilter->executeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#7: CBitrixComponent->includeComponent(string, array, object, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#8: CAllMain->IncludeComponent(string, string, array, object)
	/home/bitrix/www/local/templates/aspro_next/components/bitrix/catalog/main/filter.php:34
#9: include_once(string)
	/home/bitrix/www/local/templates/aspro_next/components/bitrix/catalog/main/page_blocks/list_elements_1.php:202
#10: include_once(string)
	/home/bitrix/www/local/templates/aspro_next/components/bitrix/catalog/main/section.php:224
#11: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:789
#12: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:884
#13: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:764
#14: CBitrixComponent->showComponentTemplate()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:712
#15: CBitrixComponent->includeComponentTemplate(string)
	/home/bitrix/www/bitrix/components/bitrix/catalog/component.php:171
#16: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#17: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:680
#18: CBitrixComponent->includeComponent(string, array, NULL, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#19: CAllMain->IncludeComponent(string, string, array)
	/home/bitrix/www/catalog/index.php:355
#20: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#21: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2