[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`iblock_property`.`ID` AS `ID`,
	`iblock_property`.`TIMESTAMP_X` AS `TIMESTAMP_X`,
	`iblock_property`.`IBLOCK_ID` AS `IBLOCK_ID`,
	`iblock_property`.`NAME` AS `NAME`,
	`iblock_property`.`ACTIVE` AS `ACTIVE`,
	`iblock_property`.`SORT` AS `SORT`,
	`iblock_property`.`CODE` AS `CODE`,
	`iblock_property`.`DEFAULT_VALUE` AS `DEFAULT_VALUE`,
	`iblock_property`.`PROPERTY_TYPE` AS `PROPERTY_TYPE`,
	`iblock_property`.`ROW_COUNT` AS `ROW_COUNT`,
	`iblock_property`.`COL_COUNT` AS `COL_COUNT`,
	`iblock_property`.`LIST_TYPE` AS `LIST_TYPE`,
	`iblock_property`.`MULTIPLE` AS `MULTIPLE`,
	`iblock_property`.`XML_ID` AS `XML_ID`,
	`iblock_property`.`FILE_TYPE` AS `FILE_TYPE`,
	`iblock_property`.`MULTIPLE_CNT` AS `MULTIPLE_CNT`,
	`iblock_property`.`TMP_ID` AS `TMP_ID`,
	`iblock_property`.`LINK_IBLOCK_ID` AS `LINK_IBLOCK_ID`,
	`iblock_property`.`WITH_DESCRIPTION` AS `WITH_DESCRIPTION`,
	`iblock_property`.`SEARCHABLE` AS `SEARCHABLE`,
	`iblock_property`.`FILTRABLE` AS `FILTRABLE`,
	`iblock_property`.`IS_REQUIRED` AS `IS_REQUIRED`,
	`iblock_property`.`VERSION` AS `VERSION`,
	`iblock_property`.`USER_TYPE` AS `USER_TYPE`,
	`iblock_property`.`USER_TYPE_SETTINGS` AS `USER_TYPE_SETTINGS_LIST`,
	`iblock_property`.`USER_TYPE_SETTINGS` AS `USER_TYPE_SETTINGS`,
	`iblock_property`.`HINT` AS `HINT`,
	`iblock_property_iblock`.`ID` AS `UALIAS_0`
FROM `b_iblock_property` `iblock_property` 
LEFT JOIN `b_iblock` `iblock_property_iblock` ON `iblock_property`.`IBLOCK_ID` = `iblock_property_iblock`.`ID`
WHERE `iblock_property_iblock`.`ID` IN (63)
AND `iblock_property`.`CODE` = 'NAME_CITYS'
/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/lib/db/mysqliconnection.php:149
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/lib/db/connection.php:331
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/lib/orm/query/query.php:3557
#2: Bitrix\Main\ORM\Query\Query->query(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/lib/orm/query/query.php:952
#3: Bitrix\Main\ORM\Query\Query->exec()
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/lib/orm/data/datamanager.php:513
#4: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/iblock/classes/general/iblockproperty.php:916
#5: CAllIBlockProperty::GetPropertyArray(string, array)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/iblock/classes/general/iblockelement.php:3468
#6: CAllIBlockElement->PrepareGetList(array, array, array, string, array, array, NULL, NULL, NULL, boolean, string, array, array, array)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/iblock/classes/mysql/iblockelement.php:106
#7: CIBlockElement->prepareSql(array, array, boolean, array)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/iblock/classes/mysql/iblockelement.php:476
#8: CIBlockElement::GetList(boolean, array, boolean, boolean, array)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/webpractik.regionalsubdomains/lib/mainlogic.php:221
#9: Webpractik\Regionalsubdomains\MainLogic::element404(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/webpractik.regionalsubdomains/lib/mainlogic.php:175
#10: Webpractik\Regionalsubdomains\MainLogic::oneStep(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/webpractik.regionalsubdomains/lib/mainlogic.php:47
#11: Webpractik\Regionalsubdomains\MainLogic::OnEndBufferContentHandler(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/tools.php:4741
#12: ExecuteModuleEventEx(array, array)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/main.php:3400
#13: CAllMain->EndBufferContent(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/main.php:3347
#14: CAllMain->EndBufferContentMan()
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/include/epilog_after.php:46
#15: require(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/include/epilog.php:3
#16: require_once(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/footer.php:4
#17: require(string)
	/var/www/proper21/data/www/properimetr21.ru/404.php:31
#18: require(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/iblock/lib/component/tools.php:85
#19: Bitrix\Iblock\Component\Tools::process404(string, boolean, boolean, boolean, string)
	/var/www/proper21/data/www/properimetr21.ru/local/templates/pro/components/bitrix/catalog/main/section.php:91
#20: include(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/component_template.php:790
#21: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/component_template.php:885
#22: CBitrixComponentTemplate->IncludeTemplate(array)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/component.php:784
#23: CBitrixComponent->showComponentTemplate()
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/component.php:724
#24: CBitrixComponent->includeComponentTemplate(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/components/bitrix/catalog/component.php:323
#25: include(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/component.php:615
#26: CBitrixComponent->__includeComponent()
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/component.php:692
#27: CBitrixComponent->includeComponent(string, array, boolean, boolean)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/classes/general/main.php:1195
#28: CAllMain->IncludeComponent(string, string, array, boolean)
	/var/www/proper21/data/www/properimetr21.ru/catalog/index.php:193
#29: include_once(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/modules/main/include/urlrewrite.php:184
#30: include_once(string)
	/var/www/proper21/data/www/properimetr21.ru/bitrix/urlrewrite.php:2
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