[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT * FROM `b_composite_page` LIMIT 0
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string)
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqlcommonconnection.php:104
#1: Bitrix\Main\DB\MysqlCommonConnection->getTableFields(string)
	/home/bitrix/www/bitrix/modules/main/lib/db/sqlhelper.php:344
#2: Bitrix\Main\DB\SqlHelper->prepareUpdate(string, array)
	/home/bitrix/www/bitrix/modules/main/lib/orm/data/datamanager.php:1279
#3: Bitrix\Main\ORM\Data\DataManager::update(array, array)
	/home/bitrix/www/bitrix/modules/main/lib/composite/internals/pagemanager.php:56
#4: Bitrix\Main\Composite\Internals\PageManager::register(string, array)
	/home/bitrix/www/bitrix/modules/main/lib/composite/engine.php:506
#5: Bitrix\Main\Composite\Engine::processPageContent(string)
	/home/bitrix/www/bitrix/modules/main/lib/composite/engine.php:424
#6: Bitrix\Main\Composite\Engine::endBuffering(string, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3223
#7: CAllMain->EndBufferContent(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3167
#8: CAllMain->EndBufferContentMan()
	/home/bitrix/www/bitrix/modules/main/include/epilog_after.php:43
#9: require(string)
	/home/bitrix/www/bitrix/modules/main/include/epilog.php:3
#10: require_once(string)
	/home/bitrix/www/bitrix/footer.php:4
#11: require(string)
	/home/bitrix/www/catalog/index.php:1569
#12: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#13: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2