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https://issues.apache.org/jira/browse/KUDU-1677?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved KUDU-1677.
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Resolution: Fixed
Fix Version/s: 1.1.0
> Ordered scans may return out-of-order rows when concurrent with compaction
> --------------------------------------------------------------------------
>
> Key: KUDU-1677
> URL: https://issues.apache.org/jira/browse/KUDU-1677
> Project: Kudu
> Issue Type: Bug
> Components: tablet
> Affects Versions: 1.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 1.1.0
>
>
> If an ordered scan starts during the 'phase 2' of a compaction (when there is
> a DuplicatingRowSet in place), then the DuplicatingRowSet ends up creating a
> UnionIterator of the original rowsets. This union is non-ordered, so it ends
> up yielding out-of-order rows.
> This is causing alter_table-randomized-test to have verification failures
> about 0.25% of the time, but should be relatively easy to reproduce by adding
> concurrent ordered scans to some stress test that causes lots of compaction.
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