Problem #

When performing MySQL®-intensive actions, you see one of the following errors:

TypeError: Argument 1 passed to Illuminate\Database\Connection::prepared() must be an instance of PDOStatement, bool given

or

TypeError: Argument 1 passed to WHMCS\Database\MysqlCompat::setLastStatement() must be an instance of PDOStatement or null, bool

These generally occur during the daily automation cron tasks, when importing TLDs and pricing, or when syncing accounts into WHMCS from a server.

Cause #

This may be due to the following causes:

• The Module Log is enabled and the system is logging a large amount of data to the MySQL database.
• The wait_timeout and interactive_timeout variables in the MySQL server configuration are too low to complete the request.

Solution #

Disable the Module Log #

We recommend disabling the Module Log unless you are actively troubleshooting a module-related issue. We also recommend using the the default values for the wait_timeout and interactive_timeout variables in the MySQL server configuration.

To disable the Module Log:

1. Go to Configuration () > System Logs.
2. Click Module Log in the left-side menu.
3. Click Disable Debug Logging.

Correct the MySQL Server Configuration #

To update the wait_timeout and interactive_timeout values to use their defaults:

1. Open your MySQL server’s /etc/mysql/my.cnf file.

2. Find the wait_timeout and interactive_timeout values:

   [mysqld]
   wait_timeout=28800
   interactive_timeout=28800
   

3. Set both values to 28800 if they do not already use this value.

   For more information, see MySQL’s wait_timeout and interactive_timeout documentation.

4. Save the changes to the file.

5. Restart your MySQL server by running the following command:

   service mysql restart

Last modified: June 14, 2024