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Bump langchain-community from 0.3.5 to 0.3.27 - #1

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Bump langchain-community from 0.3.5 to 0.3.27#1
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dependabot/pip/langchain-community-0.3.27

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@dependabot dependabot Bot commented on behalf of github Jun 29, 2026

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Bumps langchain-community from 0.3.5 to 0.3.27.

Release notes

Sourced from langchain-community's releases.

libs/community/v0.3.27

What's Changed

New Contributors

Full Changelog: langchain-ai/langchain-community@libs/community/v0.3.26...libs/community/v0.3.27

libs/community/v0.3.26

What's Changed

New Contributors

Full Changelog: langchain-ai/langchain-community@libs/community/v0.3.25...libs/community/v0.3.26

libs/community/v0.3.25

What's Changed

New Contributors

... (truncated)

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Bumps [langchain-community](https://github.com/langchain-ai/langchain-community) from 0.3.5 to 0.3.27.
- [Release notes](https://github.com/langchain-ai/langchain-community/releases)
- [Commits](https://github.com/langchain-ai/langchain-community/commits/libs/community/v0.3.27)

---
updated-dependencies:
- dependency-name: langchain-community
  dependency-version: 0.3.27
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python Pull requests that update python code labels Jun 29, 2026
@ntienvu

ntienvu commented Aug 4, 2026

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Tested this bump locally (macOS, Python 3.12) before merging and found it introduces a hard crash:

With langchain-community==0.3.27 (which pulls langchain-core 0.3.86 / langchain 0.3.30), any process that imports langchain_huggingface.HuggingFaceEmbeddings before running FAISS k-means segfaults (exit 139) with:

OMP: Error #15: Initializing libomp.dylib, but found libomp.dylib already initialized.

This is the exact import order used by run_experiment_rag.py, so merging this would break the RAG experiment runner on macOS. Reproduced minimal case:

from langchain_huggingface import HuggingFaceEmbeddings  # crash only with 0.3.27 stack
import numpy as np, faiss
km = faiss.Kmeans(16, 10, niter=5)
km.train(np.random.rand(2000, 16).astype('float32'))    # OMP Error #15 → abort

The same code passes with the currently pinned langchain-community==0.3.5 (verified in a clean venv, all repo modules import and the MUSS algorithm runs end-to-end). KMP_DUPLICATE_LIB_OK=TRUE does not rescue the full pipeline either.

Holding off on this upgrade until the duplicate-OpenMP interaction between the newer langchain stack and faiss-cpu is resolved.

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