MySQL 3158

This error occurs when a key in a JSON document is null. MySQL 3158 indicates that the key is invalid and must be non-null.

How It Affects Your App

MySQL 3158 ER_JSON_DOCUMENT_NULL_KEY indicates that a JSON document contains a null key, which is not allowed. This error can prevent the application from properly processing the JSON document, as the application may not be able to handle the null key. This can lead to unexpected results or errors in the application, as the application may not be able to properly process the JSON document. In some cases, the application may even crash due to the unexpected null key.

How To Fix

1. Check the error log for the MySQL 3158 error:

$ tail -f /var/log/mysql/error.log

2. Check the MySQL configuration file for any misconfigurations:

$ cat /etc/mysql/my.cnf

3. Check the MySQL process list for any suspicious activity:

$ mysqladmin -u root -p processlist

4. Check the MySQL user table for any suspicious users:

$ mysql -u root -p -e "SELECT * FROM mysql.user;"

5. Check the MySQL grant tables for any suspicious grants:

$ mysql -u root -p -e "SELECT * FROM mysql.db;"

6. Check the MySQL system variables for any misconfigurations:

$ mysql -u root -p -e "SHOW VARIABLES;"

7. Check the MySQL system status for any misconfigurations:

$ mysql -u root -p -e "SHOW STATUS;"

8. Use an automated database observability tool to monitor and fix the MySQL 3158 in question. Automated database observability tools can provide real-time insights into the performance and health of your database, allowing you to quickly identify and fix any issues that may arise.

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