Nhat Nguyen created LUCENE-10119:
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Summary: singleSort should not be set when after is non-null
Key: LUCENE-10119
URL: https://issues.apache.org/jira/browse/LUCENE-10119
Project: Lucene - Core
Issue Type: Bug
Components: core/search
Affects Versions: main (9.0), 8.10
Reporter: Nhat Nguyen
Assignee: Nhat Nguyen
Today we set the parameter `singleSort` to true when we have a single
comparator to skip documents whose values equal the last visited value.
However, this is incorrect when the search_after parameter is non-null as that
we will skip documents whose values are equal, but their docIDs are greater
than the docID of the `search_after` parameter.
We found this issue in Elasticsearch after upgrading it to Lucene 8.10 and
Lucene 9.
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