mayya-sharipova commented on pull request #1903:
URL: https://github.com/apache/lucene-solr/pull/1903#issuecomment-696373592
@jimczi I could not reproduce an issue of duplicate documents in Lucene,
and I am still not sure how it actually happens.
Even as we were [incorrectly
advancing](https://github.com/apache/lucene-solr/blob/master/lucene/core/src/java/org/apache/lucene/search/Weight.java#L216)
only `scorerIterator`, as `filteredIterator` is an intersection of
`collectorIterator` and `scorerIterator`, a next document from
`filteredIterator` must be a document > the current document of
`scorerIterator`? No?
There was also a question why we did not detect duplicate documents in the
tests. First, they don't happen in the tests, and before I was not using
`AssertingIndexSearcher`. I've changed the tests on _doc sort to use
`AssertingIndexSearcher`
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