How to Fix MySQL Error 2020 - (CR_NET_PACKET_TOO_LARGE) Got packet bigger than 'max_allowed_packet' bytes
MySQL is a popular open-source relational database management system used by many websites and applications. However, sometimes users may encounter an error message that says "Error 2020 - (CR_NET_PACKET_TOO_LARGE) Got packet bigger than 'max_allowed_packet' bytes." This error occurs when the size of the data packet being sent or received by MySQL exceeds the maximum allowed size defined in the server configuration.
Understanding the Error
The "max_allowed_packet" variable in MySQL determines the maximum size of a single network packet that can be sent or received by the server. By default, this value is set to 4MB (4194304 bytes). When a query or data packet exceeds this limit, MySQL throws the "CR_NET_PACKET_TOO_LARGE" error.
Fixing the Error
To resolve the MySQL Error 2020, you can follow these steps:
1. Check Current max_allowed_packet Value
Before making any changes, it's essential to check the current value of the "max_allowed_packet" variable. You can do this by logging into your MySQL server using the command-line interface or a tool like phpMyAdmin. Execute the following SQL query:
SHOW VARIABLES LIKE 'max_allowed_packet';
This query will display the current value of the "max_allowed_packet" variable.
2. Modify max_allowed_packet Value
If the current value is less than the size of the packet causing the error, you need to increase the "max_allowed_packet" value. You can do this by modifying the MySQL server configuration file, usually named "my.cnf" or "my.ini" depending on your operating system.
Open the configuration file in a text editor and locate the "[mysqld]" section. Add or modify the following line:
max_allowed_packet = 16M
In this example, we set the value to 16MB (16777216 bytes), but you can adjust it according to your needs. Save the changes and restart the MySQL server for the new configuration to take effect.
3. Verify the Changes
After restarting the MySQL server, you should verify that the changes have been applied successfully. Execute the same SQL query as before:
SHOW VARIABLES LIKE 'max_allowed_packet';
The output should now display the updated value of the "max_allowed_packet" variable.
Conclusion
The MySQL Error 2020 - (CR_NET_PACKET_TOO_LARGE) can be resolved by increasing the "max_allowed_packet" value in the MySQL server configuration. By following the steps outlined in this article, you should be able to fix this error and ensure that your MySQL server can handle larger data packets.
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