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https://issues.apache.org/jira/browse/CASSANDRA-14766?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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C. Scott Andreas updated CASSANDRA-14766:
-----------------------------------------
Severity: Critical (was: Normal)
Complexity: Challenging
Discovered By: Fuzz Test
Bug Category: Parent values: Correctness(12982)Level 1 values: Response
Corruption / Loss(12987)
Since Version: 3.0.0
> DESC order reads can fail to return the last Unfiltered in the partition in a
> legacy sstable
> --------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-14766
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14766
> Project: Cassandra
> Issue Type: Bug
> Components: Local/SSTable
> Reporter: Aleksey Yeschenko
> Assignee: Aleksey Yeschenko
> Priority: Urgent
> Fix For: 3.0.18, 3.11.4
>
>
> {{OldFormatDeserializer}}’s {{hasNext()}} method can and will consume two
> {{Unfiltered}} from the underlying iterator in some scenarios - intentionally.
> But in doing that it’s losing intermediate state of {{lastConsumedPosition}}.
> If that last block, when iterating backwards, only has two {{Unfiltered}},
> the first one will be returned, and the last one won’t as the reverse
> iterator would incorrectly things that the deserisalizer is past the index
> block, despite still having one {{Unfiltered}} unreturned.
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