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https://issues.apache.org/jira/browse/IGNITE-26346?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Denis Chudov updated IGNITE-26346:
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Reviewer: Mikhail Efremov
> Ban the creation of distribution zones which don't have data nodes at the
> moment of creation
> --------------------------------------------------------------------------------------------
>
> Key: IGNITE-26346
> URL: https://issues.apache.org/jira/browse/IGNITE-26346
> Project: Ignite
> Issue Type: Improvement
> Reporter: Denis Chudov
> Assignee: Denis Chudov
> Priority: Major
> Labels: ignite-3
> Time Spent: 10m
> Remaining Estimate: 0h
>
> *Motivation*
> The creation of zones without data nodes and alteration of zones removing all
> data nodes from them should be banned.
> For example: we have nodes A and B, having the node attribute {{{}attr{}}}:
> * A: attr=1
> * B: attr=1
> This command will fail: {{CREATE ZONE zone0 (NODES FILTER 'attr=2')}}
> This alteration will also fail: {{ALTER ZONE zone0 SET (NODES FILTER
> 'attr=2')}}
> The reasons for this:
> * recently we banned the creation of zones referring to storage profiles
> that don't exist in the cluster. We want to have the same approach with other
> things filtering the data nodes for distribution zones: they shouldn't filter
> out all nodes making the zone empty.
> * user mistakes and typos are the most common reasons for having empty data
> nodes; generally it just makes no sense. The only other reason may be running
> some setup script when some nodes in the cluster are not started yet, but it
> doesn't look like mandatory scenario to support.
> In general, it should simpify the logic of supporting of distribution zones
> with empty data nodes.
> *Definition of done*
> The creation of distribution zones with empty data nodes and alteration of
> zones in a way that they would have empty data nodes, is prohibited.
> The issue with default zone should be solved separately:
> https://issues.apache.org/jira/browse/IGNITE-26348
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