[jira] [Assigned] (IGNITE-5552) ServiceProcessor recalculates all service assignments even if there is a pending topology change

["Alexey Goncharuk (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-5552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexey Goncharuk reassigned IGNITE-5552:
----------------------------------------

    Assignee: Alexey Goncharuk

> ServiceProcessor recalculates all service assignments even if there is a pending topology change
> ------------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-5552
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5552
>             Project: Ignite
>          Issue Type: Improvement
>          Components: managed services
>    Affects Versions: 1.7
>            Reporter: Alexey Goncharuk
>            Assignee: Alexey Goncharuk
>             Fix For: 2.2
>
>
> This behavior was observed in a real cluster of hundreds of nodes and hundreds of services.
> After a ~30 new nodes startup, we expected node singletons to be deployed immediately, but the services were deployed with ~4hr delay on last nodes. The reason for this is the fact that ALL service deployments are recalculated on ALL discovery events. In this case, a single discovery event was processed in a time span of 2-5 minutes, which with the lateAffinityAssignment=true yielded a 4hr delay for the last node.
> The quick change that may improve things a lot is aborting current assignment calculations if there is a pending discovery event needs to be processed.
> The rest of the optimizations are put to https://issues.apache.org/jira/browse/IGNITE-5551



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