[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`.`CODE` IN ('rabbit_URLTOSEF')
AND UPPER(`iblock_property`.`CODE`) = 'OLD_URL'
/var/www/maxima-pnz.ru/bitrix/modules/main/lib/db/mysqliconnection.php:149
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/var/www/maxima-pnz.ru/bitrix/modules/main/lib/db/connection.php:331
#1: Bitrix\Main\DB\Connection->query
	/var/www/maxima-pnz.ru/bitrix/modules/main/lib/orm/query/query.php:3557
#2: Bitrix\Main\ORM\Query\Query->query
	/var/www/maxima-pnz.ru/bitrix/modules/main/lib/orm/query/query.php:952
#3: Bitrix\Main\ORM\Query\Query->exec
	/var/www/maxima-pnz.ru/bitrix/modules/main/lib/orm/data/datamanager.php:513
#4: Bitrix\Main\ORM\Data\DataManager::getList
	/var/www/maxima-pnz.ru/bitrix/modules/iblock/classes/general/iblockproperty.php:849
#5: CAllIBlockProperty::GetPropertyArray
	/var/www/maxima-pnz.ru/bitrix/modules/iblock/classes/general/iblockelement.php:3054
#6: CAllIBlockElement->PrepareGetList
	/var/www/maxima-pnz.ru/bitrix/modules/iblock/classes/mysql/iblockelement.php:333
#7: CIBlockElement->prepareSql
	/var/www/maxima-pnz.ru/bitrix/modules/iblock/classes/mysql/iblockelement.php:692
#8: CIBlockElement::GetList
	/var/www/maxima-pnz.ru/local/modules/rabbit.urltosef/include.php:224
#9: CRabbitUrlToSEF::OnPageStart
	/var/www/maxima-pnz.ru/bitrix/modules/main/tools.php:4741
#10: ExecuteModuleEventEx
	/var/www/maxima-pnz.ru/bitrix/modules/main/include.php:173
#11: require_once(string)
	/var/www/maxima-pnz.ru/bitrix/modules/main/include/prolog_before.php:19
#12: require_once(string)
	/var/www/maxima-pnz.ru/bitrix/modules/main/include/prolog.php:10
#13: require_once(string)
	/var/www/maxima-pnz.ru/bitrix/header.php:1
#14: require(string)
	/var/www/maxima-pnz.ru/catalog/index.php:2
#15: include_once(string)
	/var/www/maxima-pnz.ru/bitrix/modules/main/include/urlrewrite.php:184
#16: include_once(string)
	/var/www/maxima-pnz.ru/bitrix/urlrewrite.php:2
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