{
  "id": "python/starlette-uvicorn-h11-incomplete-read",
  "signature": "h11._util.LocalProtocolError: can't handle event type ConnectionClosed when role=SERVER and state=SEND_RESPONSE",
  "signature_zh": "h11._util.LocalProtocolError: 当 role=SERVER 且 state=SEND_RESPONSE 时无法处理 ConnectionClosed 事件",
  "regex": "h11\\._util\\.LocalProtocolError:\\ can't\\ handle\\ event\\ type\\ ConnectionClosed\\ when\\ role=SERVER\\ and\\ state=SEND_RESPONSE",
  "domain": "python",
  "category": "network_error",
  "subcategory": null,
  "root_cause": "The client disconnected before uvicorn finished sending the response (e.g., browser navigation or timeout), leaving h11 in an inconsistent state.",
  "root_cause_type": "generic",
  "root_cause_zh": "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。",
  "versions": [
    {
      "version": "0.29+",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "The error occurs in the protocol layer below the ASGI app; middleware never sees it.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "The protocol behavior is correct; downgrading only changes the error text.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.85,
      "how": "pip install -U uvicorn h11",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.75,
      "how": "uvicorn app:app --timeout-keep-alive 30",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": null,
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.82,
  "fix_success_rate": 0.8,
  "resolvable": "partial",
  "first_seen": "2024-09-18",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}