[Bitrix\Main\DB\ConnectionException] 
Mysql connect error [localhost]: (1040) Too many connections (400)
/var/www/html/bitrix/modules/main/lib/db/mysqliconnection.php:82
#0: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/var/www/html/bitrix/modules/main/lib/db/mysqliconnection.php:128
#1: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:312
#2: Bitrix\Main\DB\Connection->query(string, NULL)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:361
#3: Bitrix\Main\DB\Connection->queryExecute(string)
	/var/www/html/bitrix/php_interface/after_connect_d7.php:3
#4: include(string)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:1001
#5: Bitrix\Main\DB\Connection->afterConnected()
	/var/www/html/bitrix/modules/main/lib/db/mysqliconnection.php:101
#6: Bitrix\Main\DB\MysqliConnection->connectInternal()
	/var/www/html/bitrix/modules/main/lib/db/mysqliconnection.php:128
#7: Bitrix\Main\DB\MysqliConnection->queryInternal(string, NULL, NULL)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:312
#8: Bitrix\Main\DB\Connection->query(string, NULL, integer, integer)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:340
#9: Bitrix\Main\DB\Connection->queryScalar(string)
	/var/www/html/bitrix/modules/main/lib/session/handlers/table/usersessiontable.php:100
#10: Bitrix\Main\Session\Handlers\Table\UserSessionTable::lock(string)
	/var/www/html/bitrix/modules/main/lib/session/handlers/databasesessionhandler.php:50
#11: Bitrix\Main\Session\Handlers\DatabaseSessionHandler->lock(string)
	/var/www/html/bitrix/modules/main/lib/session/handlers/abstractsessionhandler.php:50
#12: Bitrix\Main\Session\Handlers\AbstractSessionHandler->read(string)
	
#13: session_start()
	/var/www/html/bitrix/modules/main/lib/session/session.php:144
#14: Bitrix\Main\Session\Session->start()
	/var/www/html/bitrix/modules/main/lib/session/kernelsessionproxy.php:42
#15: Bitrix\Main\Session\KernelSessionProxy->start()
	/var/www/html/bitrix/modules/main/include.php:171
#16: require_once(string)
	/var/www/html/bitrix/modules/main/include/prolog_before.php:14
#17: require_once(string)
	/var/www/html/bitrix/modules/main/include/prolog.php:10
#18: require_once(string)
	/var/www/html/bitrix/header.php:8
#19: require(string)
	/var/www/html/catalog/index.php:2