BerriAI/litellm · error · ValueError

Embedding batch record is missing required `input` field: mo

Error message

Embedding batch record is missing required `input` field: model={model}

What it means

Error "Embedding batch record is missing required `input` field: model={model}" thrown in BerriAI/litellm.

Source

Thrown at litellm/llms/bedrock/files/transformation.py:548

    def _coerce_embedding_input_to_string(raw_input: _EmbeddingBatchInput | None, model: str = "") -> str:
        """
        Normalize an OpenAI /v1/embeddings `input` field into the single
        string that Bedrock Titan v2 InvokeModel expects in `inputText`.

        Accepts: a string, or a single-element list containing one string.
        Rejects (with actionable messages):
          - None / missing -> ValueError
          - Multi-element string lists -> ValueError, prompts caller to
            emit one JSONL line per input
          - Pre-tokenized inputs (List[int], List[List[int]]) -> NotImplementedError
          - Any other type -> ValueError

        Extracted so the validation can be exercised in isolation and so
        future embedding-provider branches (Titan G1, Cohere) can reuse it
        without duplicating the type-shaping logic.
        """
        if raw_input is None:
            raise ValueError(f"Embedding batch record is missing required `input` field: model={model}")

        # Bedrock InvokeModel for Titan v2 takes exactly one string `inputText`
        # per call. Pre-tokenized inputs and multi-element string lists are
        # explicitly unsupported so callers emit one JSONL line per embedding
        # instead of relying on us to silently fan out or concatenate.
        if isinstance(raw_input, list):
            if len(raw_input) == 1:
                candidate = raw_input[0]
            else:
                raise ValueError(
                    "Bedrock batch embedding requires one input per JSONL "
                    "record. Got a list with "
                    f"{len(raw_input)} items for model={model}; emit one "
                    "JSONL line per input string instead."
                )
        else:
            candidate = raw_input

View on GitHub (pinned to 6c2dcb801b)

Solutions

1. Include an `input` field in each embedding batch record.

When it happens

Trigger: Thrown at litellm/llms/bedrock/files/transformation.py:548 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@6c2dcb801b (2026-08-15). Data as JSON: /api/errors/20f92bd8ce022d88. Report an issue: GitHub.