Nextcloud version (eg, 10.0.2): 11.0.2
Operating system and version (eg, Ubuntu 16.04): CentOS 7
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.6
PHP version (eg, 5.6): 7.0.21
Is this the first time you’ve seen this error?: No
Can you reliably replicate it? (If so, please outline steps): No
The issue you are facing:
We seem to have a problem whereby the maximum number of MariaDB (5.5.52) connections (max_connections)
originally changed from 100 to 200 (to overcome this problem in the past) has now had to be increased again
(the behaviour our users see is a 500 in their browser window when trying to connect to the Nextcloud instance).
The relevant log entry (in /var/log/httpd/ssl_error_log is shown below. We have
transaction-isolation set to READ-COMMITTED.
Any suggestions welcome …
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'aaaaaaa',
'passwordsalt' => 'yyyyyyy',
'secret' => 'xxxxxx',
'trusted_domains' =>
array (
0 => 'xxx.yyy.zzz.aaa',
),
'datadirectory' => '/mnt/data',
'overwrite.cli.url' => 'https://xxx.yyy.zzz.aaa',
'dbtype' => 'mysql',
'version' => '11.0.2.7',
'dbname' => 'ncdata',
'dbhost' => 'localhost',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_admin',
'dbpassword' => 'xxxxxxxx',
'installed' => true,
'ldapIgnoreNamingRules' => false,
'mail_from_address' => 'support',
'mail_smtpmode' => 'smtp',
'mail_domain' => 'bbb.ccc.ddd,
'memcache.local' => '\\OC\\Memcache\\APCu',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'localhost',
'port' => 6379,
),
'maintenance' => false,
'quota_include_external_storage' => false,
'filesystem_check_changes' => 1,
'loglevel' => 1,
'log_rotate_size' => 104855760,
'ldapProviderFactory' => '\\OCA\\User_LDAP\\LDAPProviderFactory',
'mail_smtphost' => 'aaa.bbb.ccc.ddd',
'mail_smtpport' => '25',
);
The output of your Apache/nginx/system log in /var/log/httpd/ssl_error_log:
[Thu Jul 27 09:38:23.608145 2017] [:error] [pid 10689] [client a.b.c.d:50475] PHP Fatal error: Uncaught Doctrine\\DBAL\\DBALException: Failed to connect to the database: An exception occured in driver: SQLSTATE[HY000] [1040] Too many connections in /var/www/nextcloud/lib/private/DB/Connection.php:60\nStack trace:\n#0 /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(429): OC\\DB\\Connection->connect()\n#1 /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(389): Doctrine\\DBAL\\Connection->getDatabasePlatformVersion()\n#2 /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(328): Doctrine\\DBAL\\Connection->detectDatabasePlatform()\n#3 /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(621): Doctrine\\DBAL\\Connection->getDatabasePlatform()\n#4 /var/www/nextcloud/lib/private/DB/Connection.php(147): Doctrine\\DBAL\\Connection->setTransactionIsolation(2)\n#5 /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/DriverManager.php(172): OC\\DB\\Connection->__construct(Array, Object(Doctrine\\DBAL\\Driver\\PDOMySql\\Driver), Object(D in /var/www/nextcloud/lib/private/DB/Connection.php on line 60
and in /var/log/httpd/ssl_access_log lots of GET /status.php with a 500 return code.