{"record":{"id":"c333f567a8fbe823","repo":"datawhalechina/hello-agents","slug":"str-e-c333f5","errorCode":null,"errorMessage":"生成旅行计划失败: {str(e)}","messagePattern":"生成旅行计划失败: (.+?)","errorType":"http","errorClass":"HTTPException","httpStatus":500,"severity":"error","filePath":"code/chapter13/helloagents-trip-planner/backend/app/api/routes/trip.py","lineNumber":58,"sourceCode":"        agent = get_trip_planner_agent()\n\n        # 生成旅行计划\n        print(\"🚀 开始生成旅行计划...\")\n        trip_plan = agent.plan_trip(request)\n\n        print(\"✅ 旅行计划生成成功,准备返回响应\\n\")\n\n        return TripPlanResponse(\n            success=True,\n            message=\"旅行计划生成成功\",\n            data=trip_plan\n        )\n\n    except Exception as e:\n        print(f\"❌ 生成旅行计划失败: {str(e)}\")\n        import traceback\n        traceback.print_exc()\n        raise HTTPException(\n            status_code=500,\n            detail=f\"生成旅行计划失败: {str(e)}\"\n        )\n\n\n@router.get(\n    \"/health\",\n    summary=\"健康检查\",\n    description=\"检查旅行规划服务是否正常\"\n)\nasync def health_check():\n    \"\"\"健康检查\"\"\"\n    try:\n        # 检查Agent是否可用\n        agent = get_trip_planner_agent()\n        \n        return {\n            \"status\": \"healthy\",","sourceCodeStart":40,"sourceCodeEnd":76,"githubUrl":"https://github.com/datawhalechina/hello-agents/blob/606a07d341a47be773fab7f4b71177f53f96b2c3/code/chapter13/helloagents-trip-planner/backend/app/api/routes/trip.py#L40-L76","documentation":"HTTPException(500) raised by POST /trip/plan (chapter13 trip routes) when the trip-planner agent throws anywhere in plan generation — LLM call failure, JSON parse exhaustion, tool errors. The route prints a full traceback server-side, so the stack in the console is the debugging entry point.","triggerScenarios":"LLM_API_KEY/OPENAI_API_KEY unset so the agent's LLM client fails mid-plan; agent's response parser failing (see trip_planner_agent.py:356) and its fallback also erroring; Amap tool failures propagating up through the agent loop; malformed request payload fields.","commonSituations":"Backend started without .env keys; provider outage or rate limit during a long multi-turn agent run; prompt/model regression producing unparseable plans on certain cities.","solutions":["Read the traceback printed by the route (traceback.print_exc()) — it pinpoints the layer (LLM, parsing, or tool)","Verify LLM_API_KEY/OPENAI_API_KEY and AMAP_API_KEY are configured in backend/.env","Retry with simpler/smaller request parameters (fewer days, well-known city) to isolate payload-dependent failures","Check provider status and quota if the failure is at the LLM call"],"exampleFix":"# before\nr = requests.post(f'{BASE}/trip/plan', json=body)\nr.raise_for_status()  # opaque 500\n\n# after\nr = requests.post(f'{BASE}/trip/plan', json=body, timeout=300)\nif r.status_code == 500:\n    print('Agent failure, server detail:', r.json().get('detail'))\n    r = requests.post(f'{BASE}/trip/plan', json=smaller_body, timeout=300)","handlingStrategy":"retry","validationCode":"def valid_trip_request(b: dict) -> bool:\n    return (\n        isinstance(b.get('destination'), str) and bool(b['destination'].strip())\n        and isinstance(b.get('days'), int) and 1 <= b['days'] <= 10\n    )\nassert valid_trip_request(body)","typeGuard":null,"tryCatchPattern":"for attempt in range(2):\n    r = requests.post(f'{BASE}/trip/plan', json=body, timeout=300)\n    if r.status_code == 500 and attempt == 0:\n        body['days'] = min(body['days'], 3)  # shrink workload and retry once\n        continue\n    r.raise_for_status()","preventionTips":["Set long client timeouts; agent runs are slow and timeouts masquerade as failures","Keep requests small (fewer days/days with fewer POIs) to reduce failure surface","Correlate client errors with the server traceback via a request id so the masked detail is recoverable"],"tags":["fastapi","http-500","agent","llm","trip-planning"],"backgroundTag":null,"analyzedSha":"606a07d341a47be773fab7f4b71177f53f96b2c3","analyzedAt":"2026-08-14T22:57:27.446Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}