MySQL · December 20, 2023

How to Fix MySQL Error 2014 - (CR_COMMANDS_OUT_OF_SYNC) Commands out of sync; you can't run this command now

How to Fix MySQL Error 2014 - (CR_COMMANDS_OUT_OF_SYNC) Commands out of sync; you can't run this command now

MySQL is a popular open-source relational database management system used by many websites and applications. However, like any software, it can encounter errors that can disrupt its normal operation. One such error is the MySQL Error 2014, also known as CR_COMMANDS_OUT_OF_SYNC. This error occurs when the MySQL client sends a command to the server out of sync with the previous command.

Causes of MySQL Error 2014

There are several reasons why you might encounter the MySQL Error 2014:

  • Multiple Active Result Sets (MARS): If your application uses MARS, it allows executing multiple queries simultaneously. However, if the queries are not properly synchronized, it can lead to the CR_COMMANDS_OUT_OF_SYNC error.
  • Incorrect Query Order: If your application sends queries to the MySQL server in the wrong order, it can cause the commands to be out of sync.
  • Stored Procedures: When using stored procedures, if you execute a query that returns multiple result sets and try to execute another query before consuming all the results from the previous query, it can trigger the error.

Fixing MySQL Error 2014

Here are some solutions to fix the MySQL Error 2014:

1. Check Query Order

Ensure that your application sends queries to the MySQL server in the correct order. If you have multiple queries, make sure they are executed sequentially and not concurrently.

2. Disable Multiple Active Result Sets (MARS)

If you are using MARS and encountering the CR_COMMANDS_OUT_OF_SYNC error, try disabling it. Modify your application's connection string or configuration to disable MARS and see if the error persists.

3. Use Stored Procedures Correctly

If you are using stored procedures, make sure to consume all the result sets from a query before executing another query. This can be done by iterating through the result sets or using appropriate functions to retrieve the data.

4. Update MySQL Client and Server Versions

Ensure that you are using the latest stable versions of both the MySQL client and server. Sometimes, outdated versions can have bugs or compatibility issues that may cause the CR_COMMANDS_OUT_OF_SYNC error. Updating to the latest versions can resolve such issues.

5. Review Application Code

If none of the above solutions work, review your application code for any potential issues. Look for any instances where queries are not properly synchronized or where multiple queries are being executed concurrently without proper handling.

By following these steps, you should be able to resolve the MySQL Error 2014 and ensure smooth operation of your MySQL database.

Summary

In conclusion, the MySQL Error 2014 (CR_COMMANDS_OUT_OF_SYNC) can occur when commands sent to the MySQL server are out of sync with previous commands. This error can be caused by multiple active result sets, incorrect query order, or improper usage of stored procedures. To fix this error, check the query order, disable multiple active result sets if applicable, use stored procedures correctly, update MySQL client and server versions, and review your application code. If you are looking for reliable VPS hosting solutions, consider Server.HK. Our high-performance VPS hosting services can provide the stability and resources you need for your MySQL databases.

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