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https://issues.apache.org/jira/browse/IGNITE-29216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Werner updated IGNITE-29216:
-----------------------------------
    External issue ID: IGN-2466

> Add metric for CacheVersionConflictResolver resolution failures
> ---------------------------------------------------------------
>
>                 Key: IGNITE-29216
>                 URL: https://issues.apache.org/jira/browse/IGNITE-29216
>             Project: Ignite
>          Issue Type: Task
>            Reporter: Dmitry Werner
>            Assignee: Dmitry Werner
>            Priority: Major
>              Labels: ise, metrics-to-log
>             Fix For: 2.20
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> CacheVersionConflictResolverImpl (the default conflict resolver of the CDC 
> extension) logs an unresolvable conflict as an error ("Conflict can't be 
> resolved, update ignored" / "remove ignored") and drops the incoming update.
> The only metric that reflects it is ConflictResolverRejectedCount, but such 
> updates are counted there together with regular rejections (outdated or 
> duplicate updates from the same cluster, updates that lose the field-based 
> comparison), which happen routinely during CDC replication. So lost updates 
> can't be told apart from normal operation.
> Add a counter metric (e.g. ConflictResolverErrorsCount) that increases each 
> time a conflict can't be resolved, so that lost CDC updates can be monitored 
> and alerted on. Such updates remain counted in ConflictResolverRejectedCount, 
> so regular rejections are ConflictResolverRejectedCount - 
> ConflictResolverErrorsCount.



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