[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (1040) Too many connections (400)
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:65
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:122
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, NULL, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:329
#2: Bitrix\Main\DB\Connection->query(string, NULL, integer, integer)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:357
#3: Bitrix\Main\DB\Connection->queryScalar(string)
	/home/bitrix/www/bitrix/modules/main/lib/page/framelocker.php:25
#4: Bitrix\Main\Page\FrameLocker::lock(string)
	/home/bitrix/www/bitrix/modules/main/lib/page/frame.php:436
#5: Bitrix\Main\Page\Frame->processPageContent(string)
	/home/bitrix/www/bitrix/modules/main/lib/page/frame.php:380
#6: Bitrix\Main\Page\Frame->endBuffering(string, string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3258
#7: CAllMain->EndBufferContent(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3201
#8: CAllMain->EndBufferContentMan()
	/home/bitrix/www/bitrix/modules/main/include/epilog_after.php:36
#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/handbook/airports/detail.php:113
#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