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Supplied argument is not a valid MySQL-Link resource¶
ExpressionEngine returns the following warning: “Supplied argument is not a valid MySQL-Link resource.”
Troubleshooting¶
This error is usually returned in one of two cases:
The MySQL server is down¶
This can only be resolved by the database administrator who should be contacted immediately.
MySQL has run out of database connections¶
If the server is working properly, MySQL might be running out of database connections. If that’s the case, ensure that the database is using non-persistent connections by adding the following line to config.php:
$config['db_conntype'] = "0";