v.20.10Improvement
SYSTEM RELOAD CONFIG Exception Handling Update
SYSTEM RELOAD CONFIG now throws an exception if failed to reload and continues using the previous users.xml. The background periodic reloading also continues using the previous users.xml if failed to reload. #14492 (Vitaly Baranov).Why it matters
This feature ensures that if reloading the user configuration fileusers.xml fails, the system does not silently continue with a bad state but instead raises an exception and keeps the previous valid configuration, improving reliability and observability.How to use it
Use theSYSTEM RELOAD CONFIG command to reload the users.xml configuration. If the reload fails, an exception will be thrown and the previous configuration will remain active. The background periodic configuration reload also maintains the last valid configuration on failure automatically.