Recurring searches with the same request for dense_vector exhibit consistency issues in the results. #119180
Labels
>bug
:Search Relevance/Vectors
Vector search
Team:Search Relevance
Meta label for the Search Relevance team in Elasticsearch
Elasticsearch Version
8.17.0
Installed Plugins
No response
Java Version
openjdk version "23" 2024-09-17 OpenJDK Runtime Environment (build 23+37-2369) OpenJDK 64-Bit Server VM (build 23+37-2369, mixed mode, sharing)
OS Version
Linux debian-002 6.1.0-18-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.76-1 (2024-02-01) x86_64 GNU/Linux
Problem Description
In an index without replicas, with no data being written, some vector requests, when repeated, yield inconsistent results.
This issue is reproducible in versions 8.13.4, 8.15.1, and 8.17.0, but cannot be reproduced in version 8.7.0, indicating that there is no bug in 8.7.0.
Steps to Reproduce
Here are the steps to reproduce the issue:
Below are the test results from version 8.17.0, which show consistency issues; versions 8.13.4 and 8.15.1 also have the same problem.
The following are the test results from version 8.7.0, and I have assessed the consistency to be 100%.
Logs (if relevant)
No response
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