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[DO NOT MERGE] Reproduce flaky TestAcceleratedHNSWMultiLayerRoundTrip (BQ) - #2827

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bdice wants to merge 2 commits into
NVIDIA:mainfrom
bdice:ci-repro-lucene-bq-selfmatch
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bdice wants to merge 2 commits into
NVIDIA:mainfrom
bdice:ci-repro-lucene-bq-selfmatch

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@bdice

@bdice bdice commented Oct 11, 2026

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Reproducer for the binary-quantized TestAcceleratedHNSWMultiLayerRoundTrip.testThreeLevelGraphCanBeReopenedAndSearched flake (workstream P of #2783). CI is reduced to lucene builds/tests; the lucene test job loops this test with random seeds and prints diagnostics.

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@bdice

bdice commented Oct 11, 2026

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/ok to test 37efbf2

@bdice

bdice commented Oct 11, 2026

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/ok to test 81f14dc

@bdice

bdice commented Oct 11, 2026

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Closing this reproducer. It confirmed the root cause (graph ordinal used as the insertion id after a reordering forceMerge(1): 112/39,320 BQ misses before the fix, 0/93,300 after). The fix is in #2831.

@bdice bdice closed this Oct 11, 2026
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