[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`iblock_iblock`.`ID` AS `ID`,
	`iblock_iblock`.`TIMESTAMP_X` AS `TIMESTAMP_X`,
	`iblock_iblock`.`IBLOCK_TYPE_ID` AS `IBLOCK_TYPE_ID`,
	`iblock_iblock`.`CODE` AS `CODE`,
	`iblock_iblock`.`NAME` AS `NAME`,
	`iblock_iblock`.`ACTIVE` AS `ACTIVE`,
	`iblock_iblock`.`SORT` AS `SORT`,
	`iblock_iblock`.`LIST_PAGE_URL` AS `LIST_PAGE_URL`,
	`iblock_iblock`.`DETAIL_PAGE_URL` AS `DETAIL_PAGE_URL`,
	`iblock_iblock`.`SECTION_PAGE_URL` AS `SECTION_PAGE_URL`,
	`iblock_iblock`.`CANONICAL_PAGE_URL` AS `CANONICAL_PAGE_URL`,
	`iblock_iblock`.`PICTURE` AS `PICTURE`,
	`iblock_iblock`.`DESCRIPTION` AS `DESCRIPTION`,
	`iblock_iblock`.`DESCRIPTION_TYPE` AS `DESCRIPTION_TYPE`,
	`iblock_iblock`.`XML_ID` AS `XML_ID`,
	`iblock_iblock`.`TMP_ID` AS `TMP_ID`,
	`iblock_iblock`.`INDEX_ELEMENT` AS `INDEX_ELEMENT`,
	`iblock_iblock`.`INDEX_SECTION` AS `INDEX_SECTION`,
	`iblock_iblock`.`WORKFLOW` AS `WORKFLOW`,
	`iblock_iblock`.`BIZPROC` AS `BIZPROC`,
	`iblock_iblock`.`SECTION_CHOOSER` AS `SECTION_CHOOSER`,
	`iblock_iblock`.`LIST_MODE` AS `LIST_MODE`,
	`iblock_iblock`.`RIGHTS_MODE` AS `RIGHTS_MODE`,
	`iblock_iblock`.`SECTION_PROPERTY` AS `SECTION_PROPERTY`,
	`iblock_iblock`.`PROPERTY_INDEX` AS `PROPERTY_INDEX`,
	`iblock_iblock`.`VERSION` AS `VERSION`,
	`iblock_iblock`.`LAST_CONV_ELEMENT` AS `LAST_CONV_ELEMENT`,
	`iblock_iblock`.`SOCNET_GROUP_ID` AS `SOCNET_GROUP_ID`,
	`iblock_iblock`.`EDIT_FILE_BEFORE` AS `EDIT_FILE_BEFORE`,
	`iblock_iblock`.`EDIT_FILE_AFTER` AS `EDIT_FILE_AFTER`
FROM `b_iblock` `iblock_iblock` 

WHERE UPPER(`iblock_iblock`.`CODE`) like upper('worktime')
/home/bitrix/ext_www/technodacha.ru/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/ext_www/technodacha.ru/bitrix/modules/main/lib/db/connection.php:329
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/ext_www/technodacha.ru/bitrix/modules/main/lib/entity/query.php:1821
#2: Bitrix\Main\Entity\Query->query(string)
	/home/bitrix/ext_www/technodacha.ru/bitrix/modules/main/lib/entity/query.php:454
#3: Bitrix\Main\Entity\Query->exec()
	/home/bitrix/ext_www/technodacha.ru/bitrix/modules/main/lib/entity/datamanager.php:242
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/home/bitrix/ext_www/technodacha.ru/local/templates/technodacha/header.php:7
#5: include_once(string)
	/home/bitrix/ext_www/technodacha.ru/bitrix/modules/main/include/prolog_after.php:96
#6: require(string)
	/home/bitrix/ext_www/technodacha.ru/bitrix/modules/main/include/prolog.php:11
#7: require_once(string)
	/home/bitrix/ext_www/technodacha.ru/bitrix/header.php:1
#8: require(string)
	/home/bitrix/ext_www/technodacha.ru/catalog/index.php:3
#9: include_once(string)
	/home/bitrix/ext_www/technodacha.ru/bitrix/modules/main/include/urlrewrite.php:159
#10: include_once(string)
	/home/bitrix/ext_www/technodacha.ru/bitrix/urlrewrite.php:2