[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`catalog_price`.`ID` AS `ID`,
	`catalog_price`.`CATALOG_GROUP_ID` AS `CATALOG_GROUP_ID`,
	`catalog_price`.`PRICE` AS `PRICE`,
	`catalog_price`.`CURRENCY` AS `CURRENCY`
FROM `b_catalog_price` `catalog_price` 

WHERE `catalog_price`.`PRODUCT_ID` = 29622
AND `catalog_price`.`CATALOG_GROUP_ID` IN (1,4)
AND (
	`catalog_price`.`QUANTITY_FROM` <= 1
	OR (`catalog_price`.`QUANTITY_FROM` IS NULL OR `catalog_price`.`QUANTITY_FROM` = 0)
)
AND (
	`catalog_price`.`QUANTITY_TO` >= 1
	OR (`catalog_price`.`QUANTITY_TO` IS NULL OR `catalog_price`.`QUANTITY_TO` = 0)
)
/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/main/lib/entity/query.php:3038
#2: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:797
#3: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:290
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/www/bitrix/modules/catalog/general/product.php:1020
#5: CAllCatalogProduct::GetOptimalPrice(integer)
	/home/bitrix/www/bitrix/modules/arturgolubev.gremarketing/include.php:721
#6: CArturgolubevGremarketing::_getElemtnByEID(integer)
	/home/bitrix/www/bitrix/modules/arturgolubev.gremarketing/include.php:679
#7: CArturgolubevGremarketing::getElemtnByEID(integer)
	/home/bitrix/www/bitrix/modules/arturgolubev.gremarketing/include.php:109
#8: CArturgolubevGremarketing::makePageScript()
	/home/bitrix/www/bitrix/modules/arturgolubev.gremarketing/include.php:34
#9: CArturgolubevGremarketing::onBufferContent(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/module.php:490
#10: ExecuteModuleEventEx(array, array)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3190
#11: CAllMain->EndBufferContent(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3138
#12: CAllMain->EndBufferContentMan()
	/home/bitrix/www/bitrix/modules/main/include/epilog_after.php:36
#13: require(string)
	/home/bitrix/www/bitrix/modules/main/include/epilog.php:3
#14: require_once(string)
	/home/bitrix/www/bitrix/footer.php:4
#15: require(string)
	/home/bitrix/www/catalog/index.php:808
#16: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#17: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2