[IGNITE-19792] Support @Immutable logic for distributed configuration

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: 3.0
• Labels: ignite-3
• Epic Link: Configuration improvements
• Assignee: Kirill Sizov
• Reporter: Roman Puchkovskiy
• Created: 21/Jun/23 11:41
• Updated: 04/Sep/24 16:10

Description

For distributed properties, the following scenario makes sense:

1. Property value might be set on cluster init
2. If it is provided, it overrides the default; otherwise, the default (set in the @Value annotation) is used
3. Any attempt to modify the property value using a changer is rejected by a validator

@Immutable annotation is designed to trigger such behavior.

Now, the observed behavior is different: if a property is annotated as @Immutable, then, if a value is supplied during cluster initialization, the value is silently ignored, so it is impossible to configure such property to anything different from the default.

Issue Links

• relates to: IGNITE-19911 Initial cluster configuration should be validated against the default configuration
• relates to: IGNITE-19502 Separate component to keep database schema and manage changes in it
• relates to: IGNITE-20499 Ability to obtain actual cluster configuration values during startup.
• links to: GitHub Pull Request #2406