The MySQL server has gone away error (Error Code 2006) means the network connection has been dropped. If you’re a WordPress user, site owner, or developer, encountering the “mysql server has gone away” error can be frustrating and disruptive. This article is designed for anyone running WordPress sites or developing with MySQL databases who wants to understand why the “mysql server has gone away” error occurs, how to fix it, and how to prevent it from causing site downtime or data loss.
We’ll cover:
Who this guide is for: WordPress users, site administrators, and developers.
What you’ll learn: The main causes of the “mysql server has gone away” error and step-by-step solutions.
Why it matters: Preventing this error helps keep your website online, protects your data, and ensures a smooth user experience.
Common causes of the MySQL server has gone away error include:
Database connections have been closed, often resulting in Error Code 2006 when the network connection is dropped.
Server exceeding timeout settings, as MySQL closes idle connections after 28800 seconds to free up system resources.
Attempting to upload a file or run a query that is too large for the server to handle.
Exceeding the maximum allowed packet size can cause the server to terminate the connection.
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MySQL Server Has Gone Away Error: What Causes It?
The MySQL server has gone away error (Error Code 2006) means the network connection has been dropped. Understanding the root causes of this error is the first step to resolving it and preventing future issues.
Automatic Reconnection Settings
Your MySQL server wasn’t set to reconnect automatically in the client settings.
When a connection timeout occurs on the server, client connections will be lost.
Idle connections can hit the default wait_timeout value—MySQL closes idle connections after 28800 seconds.
Corrupted Database
Database corruption can prompt the need to fix or recover the database from a backup.
Corruption may occur due to server crashes, hardware failures, or improper shutdowns.
Query Execution Problems
The server may encounter problems while executing a query.
This can include syntax errors, resource limitations, or server misconfigurations.
Large Query Packet Size
The error can result from a query being too large for the server to process.
In MySQL, server variables such as max_allowed_packet control the maximum packet size.
Exceeding the maximum allowed packet size can cause the server to terminate the connection.
The default max_allowed_packet size is 64MB, so checking the current value is important.
Network and Hosting Issues
The problem could originate from your hosting provider.
If your database server goes down, you may see this error.
Network issues, transient drops, or traffic spikes can also trigger it, similar to other browser-level problems such as the ERR_CONNECTION_REFUSED error.
The MySQL service may drop connections during a restart, after a crash, or due to Out of Memory issues.
Reviewing Logs for Clues
If the cause is not obvious, reviewing MySQL and system logs (including mysqld logs) can provide answers and point you to the right solution.
Now that we’ve covered the main causes, let’s look at how to resolve the error.
How To Fix MySQL Server Error
Resolving the “mysql server has gone away” error involves a series of troubleshooting steps. Start with general solutions and move to more specific fixes as needed.
Increase Timeout Setting
A common fix is to increase the wait_timeout value after checking its current setting.
This is especially helpful when idle connections are being closed.
Backend scripts may leave the database connection open during non-database work.
Automatic reconnection in the client settings or using a connection pool can improve stability.
Firewalls, proxies, or cloud network devices can drop the MySQL port connection while it sits idle, especially for clients on different hosts.
For developers, on Windows or PHP clients, periodically using mysql_ping() before reusing a connection can help avoid the error message.
Fix Any Corrupted Database
Check for Killed Processes
A corrupted database is not the only cause; a running thread or process may be killed by database administrators, which can also drop the connection and even lead to symptoms like a blank WordPress admin panel.
Validate Connection Before Query
Application code should check whether it can still connect before executing a query.
A logic error or incorrect assumption about an open connection can make an incorrect request and trigger the same message, just as misconfigured servers can result in a 503 Service Temporarily Unavailable error in WordPress.
Do a Full Backup Restoration
If the database is severely corrupted or data is lost, restoring from a full backup may be necessary.
Always ensure you have recent backups before making major changes, or consider reaching out to WordPress experts for personalized assistance if you are unsure how to proceed safely.
Transitioning from fixing corrupted databases, let’s wrap up with some helpful resources and a summary of what we’ve covered.
Conclusion – MySQL Server Has Gone Away Error
Useful resources for further troubleshooting and prevention:
For related WordPress issues, you may also want to explore guides on reasons why you can’t log in to the WordPress admin and how to fix them, disabling a WordPress theme using FTP, changing your WordPress admin password, and what to do when you can’t delete a WordPress plugin.
Summary
To recap, the “mysql server has gone away” error in WordPress is typically caused by:
Idle connections exceeding the wait_timeout value (MySQL closes idle connections after 28800 seconds).
Large queries or uploads exceeding the max_allowed_packet size (default is 64MB).
Network interruptions or server restarts.
Corrupted databases or killed processes.
Key solutions include:
Increasing the wait_timeout and max_allowed_packet settings.
Ensuring automatic reconnection is enabled in your client or application.
Checking for and repairing corrupted databases.
Restoring from a backup if necessary.
Reviewing logs to identify the root cause.
By understanding the causes, applying the right fixes, and taking preventive measures, you can minimize downtime and protect your WordPress site from data loss due to the “mysql server has gone away” error.