python network_error ai_generated partial

h11._util.LocalProtocolError: can't handle event type ConnectionClosed when role=SERVER and state=SEND_RESPONSE

ID: python/starlette-uvicorn-h11-incomplete-read

Also available as: JSON · Markdown · 中文
80%Fix Rate
82%Confidence
0Evidence
2024-09-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
0.29+ active — — —

Root Cause

The client disconnected before uvicorn finished sending the response (e.g., browser navigation or timeout), leaving h11 in an inconsistent state.

generic

中文

客户端在 uvicorn 完成响应发送前断开连接（如浏览器导航或超时），导致 h11 处于不一致状态。

Workarounds

  1. 85% success 
    pip install -U uvicorn h11
  2. 75% success 
    uvicorn app:app --timeout-keep-alive 30

Dead Ends

Common approaches that don't work:

  1. 80% fail

    The error occurs in the protocol layer below the ASGI app; middleware never sees it.

  2. 70% fail

    The protocol behavior is correct; downgrading only changes the error text.