Cause (Documented platform behavior): hf_transfer is no longer used by huggingface_hub; high-performance transfer is via Xet and controlled by HF_XET_HIGH_PERFORMANCE.
Fix status: documented_behavior
Misleading approaches:
- pip install hf_transfer to make the warning go away
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/huggingface/huggingface_hub/main/src/huggingface_hub/constants.py (official_docs, 2026-09-27, documented_behavior): constants.py warns with FutureWarning when HF_HUB_ENABLE_HF_TRANSFER is set (and HF_XET_HIGH_PERFORMANCE is not): hf_transfer is not used anymore; use HF_XET_HIGH_PERFORMANCE.
- https://raw.githubusercontent.com/huggingface/huggingface_hub/main/docs/source/en/concepts/migration.md (official_docs, 2025-10-27, documented_behavior): v1.0 migration guide: all Hub repos are Xet-enabled, hf_xet is the default transfer backend, support for hf_transfer was removed and HF_HUB_ENABLE_HF_TRANSFER is ignored; use HF_XET_HIGH_PERFORMANCE.
Search phrasings: HF_HUB_ENABLE_HF_TRANSFER deprecated warning; hf_transfer not used anymore xet; huggingface fast download HF_XET_HIGH_PERFORMANCE
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- FutureWarning at import; downloads no longer use hf_transfer, so performance tuning based on it has no effect; installing hf_transfer is unnecessary.
- Context
- Product: Hugging Face Hub Python library Component: huggingface_hub download backend (Xet replaces hf_transfer) Operation: Setting HF_HUB_ENABLE_HF_TRANSFER=1 (Dockerfiles, CI, vLLM/TGI images) for faster model downloads Affected versions: huggingface_hub >=1.0.0 (hf_transfer support removed; env var ignored) Environment: Docker images and CI templates that set HF_HUB_ENABLE_HF_TRANSFER Exception: FutureWarning Packages: huggingface_hub >=1.0.0 Trigger: Legacy env var from older tutorials/images.
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- The `HF_HUB_ENABLE_HF_TRANSFER` environment variable is deprecated as 'hf_transfer' is not used anymore. Please use `HF_XET_HIGH_PERFORMANCE` instead to enable high performance transfer with Xet.
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [huggingface_hub] FutureWarning 'The HF_HUB_ENABLE_HF_TRANSFER environment variable is deprecated as hf_transfer is not used anymore' - fast-download setups silently lose hf_transfer; us
Recommended action: Remove HF_HUB_ENABLE_HF_TRANSFER and the hf_transfer dependency; set HF_XET_HIGH_PERFORMANCE=1 where fast transfers are needed.
Option: Switch to HF_XET_HIGH_PERFORMANCE [evidence: official_recommended_action]
Applies when: Any environment setting HF_HUB_ENABLE_HF_TRANSFER
Steps:
1. Remove HF_HUB_ENABLE_HF_TRANSFER
2. export HF_XET_HIGH_PERFORMANCE=1
Expected: No warning; Xet high-performance transfer
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- e7a4530d-03c8-4f7f-b9f8-1a8ffed25a8c
- Proposed action
- Recommended action: Remove HF_HUB_ENABLE_HF_TRANSFER and the hf_transfer dependency; set HF_XET_HIGH_PERFORMANCE=1 where fast transfers are needed. Option: Switch to HF_XET_HIGH_PERFORMANCE [evidence: official_recommended_action] Applies when: Any environment setting HF_HUB_ENABLE_HF_TRANSFER Steps: 1. Remove HF_HUB_ENABLE_HF_TRANSFER 2. export HF_XET_HIGH_PERFORMANCE=1 Expected: No warning; Xet high-performance transfer
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.