connection errors

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Stack trace:
#0 /home/xxx/public_html/system/library/db.php(9): DB\MySQLi->__construct('localhost', 'xxx', 'xxx', 'xxx, '3306')
#1 /home/xxx/public_html/vqmod/vqcache/vq2-system_framework.php(147): DB->__construct('mysqli', 'localhost', 'xxx', 'xxx', 'mxxx', '3306')
#2 /home/xxx/public_html/vqmod/vqcache/vq2-system_startup.php(124): require_once('/home/xxx...')
#3 /home/xxx/public_html/index.php(23): start('catalog')
#4 {main}
  thrown in /home/xxx/public_html/system/library/db/mysqli.php on line 10
[04-Dec-2017 22:39:47 UTC] PHP Warning:  mysqli::mysqli(): (HY000/1203): User xxx already has more than 'max_user_connections' active connections in /home/xxx/public_html/system/library/db/mysqli.php on line 7
[04-Dec-2017 22:39:47 UTC] PHP Warning:  DB\MySQLi::__construct(): Couldn't fetch mysqli in /home/xxx/public_html/system/library/db/mysqli.php on line 10
[04-Dec-2017 22:39:47 UTC] PHP Warning:  DB\MySQLi::__construct(): Couldn't fetch mysqli in /home/xxx/public_html/system/library/db/mysqli.php on line 10
[04-Dec-2017 22:39:47 UTC] PHP Fatal error:  Uncaught exception 'Exception' with message 'Error: <br />Error No: ' in /home/xxx/public_html/system/library/db/mysqli.php:10

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2017-12-04 23:24:20 - PHP Warning:  Header may not contain NUL bytes in /home/xxx/public_html/system/storage/modification/system/library/response.php on line 12

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public function redirect($url, $status = 302) {
		[b]header('Location: ' . str_replace(array('&', "\n", "\r"), array('&', '', ''), $url), true, $status);[/b]
		exit();
	}

Code: Select all

[04-Dec-2017 23:33:43 UTC] PHP Warning:  Error while sending QUERY packet. PID=28608 in /home/xxx/public_html/system/library/db/mysqli.php on line 18
[04-Dec-2017 23:33:43 UTC] PHP Fatal error:  Uncaught exception 'Exception' with message 'Error: MySQL server has gone away<br />Error No: 2006<br />SELECT * FROM `oc_setting` WHERE code='image_path'' in /home/xxx/public_html/system/library/db/mysqli.php:40
Stack trace:
#0 /home/xxxpublic_html/system/library/db.php(16): DB\MySQLi->query('SELECT * FROM `...', Array)
#1 /home/xxx/public_html/vqmod/vqcache/vq2-system_framework.php(161): DB->query('SELECT * FROM `...')
#2 /home/xxx/public_html/vqmod/vqcache/vq2-system_startup.php(124): require_once('/home/melodyjan...')
#3 /home/xxx/public_html/index.php(23): start('catalog')
#4 {main}
  thrown in /home/xxx/public_html/system/library/db/mysqli.php on line 40