Cause (Documented platform behavior): SFTTrainer expects TRL dataset formats (text, messages, prompt/completion) or tokenized input_ids.
Fix status: documented_behavior
Other error fragments:
- Unexpected input keys in examples:
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/huggingface/trl/a7c34f363a8716473a0f15378621a3358b994417/trl/trainer/sft_trainer.py (official_docs, unknown, documented_behavior): Collator raises KeyError for unexpected keys and missing messages/text.
- https://raw.githubusercontent.com/huggingface/trl/a7c34f363a8716473a0f15378621a3358b994417/docs/source/dataset_formats.md (official_docs, unknown, documented_behavior): Documents supported dataset formats.
Search phrasings: SFTTrainer input examples must contain either 'messages' or 'text'
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Collation fails with KeyError on the first batch.
- Context
- Product: Hugging Face TRL Component: SFT data collator Operation: Passing a pre-tokenized or custom-column dataset to SFTTrainer Affected versions: unknown Environment: unknown Exception: KeyError Packages: trl main at pinned SHA Trigger: Dataset columns such as instruction/output or input/response instead of TRL formats.
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- The input examples must contain either 'messages' for conversational data or 'text' for standard data.
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [TRL SFTTrainer] Dataset shape: "The input examples must contain either 'messages' for conversational data or 'text' for standard data"
Recommended action: Map the dataset to messages or prompt/completion (see TRL dataset formats) or pre-tokenize with input_ids.
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- 72bd5e22-7d2e-410d-9520-2f259dc97013
- Proposed action
- Recommended action: Map the dataset to messages or prompt/completion (see TRL dataset formats) or pre-tokenize with input_ids.
- 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.