Fixed merge logic for multiple shards case #877
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Signed-off-by: Martin Gaievski <gaievski@amazon.com>
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src/main/java/org/opensearch/neuralsearch/search/query/TopDocsMerger.java
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Signed-off-by: Martin Gaievski <gaievski@amazon.com>
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* Fixed merge logic for multiple shards case Signed-off-by: Martin Gaievski <gaievski@amazon.com> (cherry picked from commit 3a6bdc7)
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* Fixed merge logic for multiple shards case Signed-off-by: Martin Gaievski <gaievski@amazon.com> (cherry picked from commit 3a6bdc7)
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* Fixed merge logic for multiple shards case Signed-off-by: Martin Gaievski <gaievski@amazon.com>
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* Fixed merge logic for multiple shards case Signed-off-by: Martin Gaievski <gaievski@amazon.com>
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Description
Fix for scenario in hybrid query search when:
It's a gap in existing code, we only handle scenarios when merged result object is not empty and we're merging it with an empty result object.
The issue isn't trivial to repro because the sequence in which segment/shard results are passed to a merger isn't guaranteed, and we need to ingest documents and run search multiple times. Credit for providing a tool to replicate the issue goes to @eemmiirr, I used his script /~https://github.com/eemmiirr/opensearch-concurrent-segment-search-bug.
Related Issues
Resolves #875
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