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https://issues.apache.org/jira/browse/IGNITE-9828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16660559#comment-16660559
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Ivan Pavlukhin commented on IGNITE-9828:
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In ticket https://issues.apache.org/jira/browse/IGNITE-5935 partition counters
"gap" closing was implemented. Gaps are closed in a way that all numeric
counter values are consistent after PME. See method
{{PartitionUpdateCounter.finalizeUpdateCountres}}. The missing part is CQ
manager notification in situation of gap closing.
> MVCC: Continuous query failover.
> --------------------------------
>
> Key: IGNITE-9828
> URL: https://issues.apache.org/jira/browse/IGNITE-9828
> Project: Ignite
> Issue Type: Task
> Components: mvcc
> Reporter: Roman Kondakov
> Priority: Major
> Fix For: 2.8
>
>
> We need to implement failover procedure for CQ with MVCC caches. Thoughts:
> * Mvcc updates should be cached in the persistent off-heap data structures
> instead of heap.
> * CQ failover tests should be adopted for mvcc scenarios. See
> {{IgniteCacheQuerySelfTestSuite4}}
> * We need to ensure the correctness of CQ and partition counters consistency
> in cases when some of TX participants are in prepared state and others are
> marked as rollback only. It looks like it doesn't work properly now.
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