BerriAI/litellm · error · HTTPException

Collection name is required. Got {request_body}

Error message

Collection name is required. Got {request_body}

What it means

Raised by the Milvus /vectors pass-through handler when the parsed request body lacks a 'collectionName' entry (missing, null, or empty). The collection name is the key used to resolve a LiteLLM-managed vector store index, so a request without it cannot be routed; the offending request body is echoed back in the detail.

Source

Thrown at litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py:458

    Enable using Milvus `/vectors` endpoint as a pass-through endpoint.
    """

    provider_config: Final = ProviderConfigManager.get_provider_vector_stores_config(provider=LlmProviders.MILVUS)
    if not provider_config:
        raise HTTPException(
            status_code=500,
            detail="Unable to find Milvus vector store config.",
        )

    # check if managed vector store index is used
    request_body: Final = await get_request_body(request)

    # check collectionName
    collection_name: Final = cast(str | None, request_body.get("collectionName"))
    extra_headers = {}
    base_target_url: str | None = None
    if not collection_name:
        raise HTTPException(
            status_code=400,
            detail=f"Collection name is required. Got {request_body}",
        )

    if not litellm.vector_store_index_registry or not litellm.vector_store_registry:
        raise HTTPException(
            status_code=500,
            detail="Unable to find Milvus vector store index registry or vector store registry.",
        )

    # check if vector store index
    is_vector_store_index: Final = litellm.vector_store_index_registry.is_vector_store_index(
        vector_store_index_name=collection_name
    )

    if not is_vector_store_index:
        raise HTTPException(
            status_code=400,

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Include a non-empty collection name in the request body (collection_name field or path segment).
2. Check the request body shown in the error for a missing or empty collection field.

When it happens

Trigger: Thrown at litellm/proxy/pass_through_endpoints/llm_passthrough_endpoints.py:458 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@77b7c6c40c (2026-08-18). Data as JSON: /api/errors/e8e380c78c5453d7. Report an issue: GitHub.