zilliztech / zilliztech/VectorDBBench

opensearch-py client broken in latest release

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Python
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Description

I installed latest version of vectordb-bench to run a benchmark against aws opensearch (version 2.19) and was facing below error when running ingestion:

2025-10-01 23:05:20,618 | WARNING: Failed to insert data: vdb_bench_index error: OpenSearch.bulk() takes 1 positional argument but 2 positional arguments (and 2 keyword-only arguments) were given

While debugging I noticed it was installing latest 3.0.0 version of opensearch-py client which seems to be broken when used against OpenSearch-2.x versions, after pinning the opensearch-py version to 2.8.0 the issue was fixed.

I would recommend to pin the opensearch-py version to 2.8.0 as it is compatible with OS-2x and 3.x versions.

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Research direction

Locate the dependency declaration used to install opensearch-py, then reproduce the ingestion path against AWS OpenSearch 2.19. Confirm that the dependency is constrained to 2.8.0 and that ingestion no longer raises the OpenSearch.bulk positional-argument error.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
databases, search
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
55/100

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