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https://dev.mysql.com/doc/refman/9.7/en/selinux-troubleshooting.html
$> systemctl start mysql.service Job for mysqld.service failed because the control process exited with error code. If you configure the MySQL Server to use a non-default port, such as port 3307, and do not update the policy to reflect the change, ...
https://dev.mysql.com/doc/refman/9.7/en/server-logs.html
MySQL Server has several logs that can help you find out what activity is taking place. The following log-specific sections provide information about the server options that enable logging. By default, the server writes files for all enabled logs ...
https://dev.mysql.com/doc/refman/9.7/en/server-shutdown.html
If the server tries to create a shutdown thread and cannot (for example, if memory is exhausted), it issues a diagnostic message that appears in the error log: Error: Can't create thread to kill server The server stops accepting new connections.
https://dev.mysql.com/doc/refman/9.7/en/set-role.html
The server writes warnings to its error log for default roles that cannot be activated, but the client receives no warnings. If a user executes SET ROLE DEFAULT during a session, an error occurs if any default role cannot be activated (for example, ... SET ROLE { DEFAULT | NONE | ALL | ALL EXCEPT role [, role ] ...
https://dev.mysql.com/doc/refman/9.7/en/set.html
Duplicate values in the definition cause a warning, or an error if strict SQL mode is enabled. A SET is a string object that can have zero or more values, each of which must be chosen from a list of permitted values specified when the table is ...
https://dev.mysql.com/doc/refman/9.7/en/sha256-pluggable-authentication.html
If the key file contains a valid public key value but the value is incorrect, an access-denied error occurs. MySQL provides two authentication plugins that implement SHA-256 hashing for user account passwords: sha256_password: Implements basic ...
https://dev.mysql.com/doc/refman/9.7/en/show-engines.html
In the latter case, the error log should contain a reason indicating why the option is disabled. SHOW [STORAGE] ENGINES SHOW ENGINES displays status information about the server's storage engines. This is particularly useful for checking whether a ...
https://dev.mysql.com/doc/refman/9.7/en/source-installation-doxygen.html
Open an administrator console and run this command: $> java -jar path-to-plantuml.jar The command should open a GUI window and return no errors on the console. Next, generate the doxygen documentation: $> make doxygen Inspect the error log, which is ... The MySQL source code contains internal documentation written using ...
https://dev.mysql.com/doc/refman/9.7/en/source-installation-prerequisites.html
If you encounter build errors such as internal compiler error when compiling large source files, it may be that you have too little memory. Some of these tools are needed no matter whether you use a standard source distribution or a development ...
https://dev.mysql.com/doc/refman/9.7/en/srjs-examples.html
This section contains examples illustrating a number of different aspects of using JavaScript programs under various circumstances. The following example demonstrates the use of a JavaScript stored function with table column values. Next, we create ...