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https://issues.apache.org/jira/browse/CASSANDRA-14803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16755485#comment-16755485
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Jeff Jirsa commented on CASSANDRA-14803:
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[~bdeggleston] / [~beobal] - please set the fixver.
> Rows that cross index block boundaries can cause incomplete reverse reads in
> some cases.
> ----------------------------------------------------------------------------------------
>
> Key: CASSANDRA-14803
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14803
> Project: Cassandra
> Issue Type: Bug
> Components: Legacy/Local Write-Read Paths
> Reporter: Blake Eggleston
> Assignee: Blake Eggleston
> Priority: Major
> Fix For: 3.0.x, 3.11.x
>
>
> When we're reading 2.1 sstables in reverse, we skip the first row of an index
> block if it's split across index boundaries. The entire row will be read at
> the end of the next block. In some cases though, the only thing in this index
> block is the partial row, so we return an empty iterator. The empty iterator
> is then interpreted as the end of the row further down the call stack, so we
> return early without reading the rest of the data. This only affects 3.x
> during upgrades from 2.1
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