[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
			
		
							INNER JOIN b_iblock_33_index F ON BE.ID = F.ELEMENT_ID
					WHERE
						F.SECTION_ID = 259
						and F.FACET_ID in (734,584,588,590,600,602,604,606,612,614,620,622,640,642,646,648,650,652,816,818,1170,732,1928,1930)
						
			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 = '33'))))
			)
			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
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/facet.php:340
#2: Bitrix\Iblock\PropertyIndex\Facet->query
	/home/bitrix/www/bitrix/components/w247.catalogs/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/w247.catalogs/catalog.smart.filter/class.php:138
#6: CBitrixCatalogSmartFilter->executeComponent
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#7: CBitrixComponent->includeComponent
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1046
#8: CAllMain->IncludeComponent
	/home/bitrix/www/local/components/w247.catalogs/catalog/templates/.default/section.php:2393
#9: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:789
#10: CBitrixComponentTemplate->__IncludePHPTemplate
	/home/bitrix/www/bitrix/modules/main/classes/general/component_template.php:884
#11: CBitrixComponentTemplate->IncludeTemplate
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:764
#12: CBitrixComponent->showComponentTemplate
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:712
#13: CBitrixComponent->includeComponentTemplate
	/home/bitrix/www/local/components/w247.catalogs/catalog/class.php:268
#14: W247CatalogsComponent->executeComponent
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:656
#15: CBitrixComponent->includeComponent
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1046
#16: CAllMain->IncludeComponent
	/home/bitrix/www/catalog/index.php:233
#17: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#18: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2