Fix flaky MMR diversification YAML tests#143706
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mayya-sharipova merged 2 commits intoelastic:mainfrom Mar 6, 2026
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Fix flaky MMR diversification YAML tests#143706mayya-sharipova merged 2 commits intoelastic:mainfrom
mayya-sharipova merged 2 commits intoelastic:mainfrom
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The default int8_hnsw index type quantizes float32 vectors to int8, introducing enough scoring error to non-deterministically reorder documents with close cosine similarities. With only 4 dimensions the quantization is particularly coarse. Use explicit hnsw index type on test dense_vector mappings to get exact float scoring and deterministic KNN result ordering. Update expected results to reflect exact cosine ordering. Closes elastic#143430 Closes elastic#143609
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…locations * upstream/main: (153 commits) ES|QL: Update docs for TOP_SNIPPETS and DECAY (elastic#143739) Correctly include endpoint id in log msg in AuthorizationPoller (elastic#143743) Bar searching or sorting on _seq_no when disabled (elastic#143600) Generalize `testClientCancellation` test (elastic#143586) JSON_EXTRACT: zero-copy byte slicing for object, array, and number extraction (elastic#143702) Track recycler pages in circuit breaker (elastic#143738) [ESQL] Enable distributed pipeline breakers for external sources via FragmentExec (elastic#143696) Adding 'mode' and 'codec' fields to ES monitoring template (elastic#143673) [ESQL] Columnar I/O and vectorized block conversion for external sources (elastic#143703) Fix flaky MMR diversification YAML tests (elastic#143706) ES|QL codegen: check builder arguments for vector support (elastic#143724) Add Views Security Model (elastic#141050) ESQL: Prevent pushdown of unmapped fields in filters and sorts (elastic#143460) Don't run seq_no pruning tests in release CI (elastic#143725) ESQL: Support intra-row field references in ROW command (elastic#140217) ES|QL: Remove implicit limit in FORK branches in CSV tests (elastic#143601) IndexRoutingTests with and without synthetic id (elastic#143566) Synthetic id upgrade test in serverless (elastic#142471) Disable "Review skipped" comments for PRs without specified labels (elastic#143728) Cleanup ES|QL T-Digest code duplication, add memory accounting (elastic#143662) ...
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The default int8_hnsw index type quantizes float32 vectors to int8, introducing enough scoring error to non-deterministically reorder documents with close cosine similarities. With only 4 dimensions the quantization is particularly coarse. Use explicit hnsw index type on test dense_vector mappings to get exact float scoring and deterministic KNN result ordering. Update expected results to reflect exact cosine ordering. Closes elastic#143430 Closes elastic#143609
This was referenced Mar 11, 2026
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The default int8_hnsw index type quantizes float32 vectors to
int8, introducing enough scoring error to non-deterministically
reorder documents with close cosine similarities. With only 4
dimensions the quantization is particularly coarse.
Use explicit hnsw index type on test dense_vector mappings to
get exact float scoring and deterministic KNN result ordering.
Update expected results to reflect exact cosine ordering.
Closes #143430
Closes #143609