lm-sys / lm-sys/FastChat

OpenAI API Streaming Issue Occurs with Error Code 50001

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Dominant language
Python
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Description

When a request exceeds the allowable token count, the system generates the following response:

{"text": "YOUR INPUT VIOLATES OUR CONTENT MODERATION GUIDELINES. PLEASE FIX YOUR INPUT AND TRY AGAIN.\n\n(max_tokens must be at least 1, got -37938.)", "error_code": 50001}

The format shown above can cannot be correctly parsed as per the script at https://github.com/openai/openai-python/blob/main/src/openai/_streaming.py#L64

The correct format should look like this

{"id": "chatcmpl-NACKJsrvmTbrX4xKvjnVZG", "model": "xxxxxx", "choices": [{"index": 0, "delta": {"role": "assistant"}, "finish_reason": null}], "error": "xxxx"}

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading openai-python's src/openai/_streaming.py around line 64, then trace the FastChat streaming response path that produces the shown JSON. Reproduce the over-token request and compare its response with the expected streaming format; done means the error response can be parsed consistently.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
api, backend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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