{
  "date": "2026-09-11",
  "user_request": "用户再次上传9 MB文件，要求抓取相关线上数据；窗口内回报仍提示网络请求出错。",
  "capture_window": {
    "start": "2026-09-11T13:41:25+08:00",
    "end": "2026-09-11T13:46:25+08:00",
    "status": "Success; remote watcher and local collector have exited"
  },
  "scope": "Read existing target-domain access logs, target-domain errors in global nginx error log, relevant default-vhost upload routes; read SLS application logs and CLB metrics. No application/config edits, service restarts, packet payload capture, test uploads or file-content collection.",
  "live_counts": {
    "ai_access_lines": 195,
    "ai_sh_access_lines": 0,
    "default_access_lines_scanned": 4834,
    "nginx_error_new_lines": 0
  },
  "coverage_limit": "Watcher emitted at most120 events; cloud command output was truncated (71 complete JSON records retained plus partial line). Did not rely on the partial event output for upload-absence conclusion; independently reread source access log over13:40-to-post-capture time.",
  "source_log_backfill": {
    "target_ai_domain_requests": 211,
    "http_status_counts": {
      "200": 211
    },
    "upload_route_matches": 0,
    "http_error_matches": 0,
    "unparsed_access_lines": 0,
    "alternate_ai_domain_requests": 0
  },
  "clb_metrics": [
    {
      "metric": "StatusCode4xx",
      "code": "200",
      "points": [
        {
          "time": "2026-09-11T13:41:00+08:00",
          "Average": 0.0
        },
        {
          "time": "2026-09-11T13:42:00+08:00",
          "Average": 0.0
        },
        {
          "time": "2026-09-11T13:43:00+08:00",
          "Average": 0.0
        },
        {
          "time": "2026-09-11T13:44:00+08:00",
          "Average": 0.0
        },
        {
          "time": "2026-09-11T13:45:00+08:00",
          "Average": 0.0
        }
      ]
    },
    {
      "metric": "StatusCode5xx",
      "code": "200",
      "points": [
        {
          "time": "2026-09-11T13:41:00+08:00",
          "Average": 0.0
        },
        {
          "time": "2026-09-11T13:42:00+08:00",
          "Average": 0.0
        },
        {
          "time": "2026-09-11T13:43:00+08:00",
          "Average": 0.0
        },
        {
          "time": "2026-09-11T13:44:00+08:00",
          "Average": 0.0
        },
        {
          "time": "2026-09-11T13:45:00+08:00",
          "Average": 0.0
        }
      ]
    },
    {
      "metric": "DropConnection",
      "code": "200",
      "points": [
        {
          "time": "2026-09-11T13:41:00+08:00",
          "Average": 0.0,
          "Maximum": 0.0,
          "Minimum": 0.0
        },
        {
          "time": "2026-09-11T13:42:00+08:00",
          "Average": 0.0,
          "Maximum": 0.0,
          "Minimum": 0.0
        },
        {
          "time": "2026-09-11T13:43:00+08:00",
          "Average": 0.0,
          "Maximum": 0.0,
          "Minimum": 0.0
        },
        {
          "time": "2026-09-11T13:44:00+08:00",
          "Average": 0.0,
          "Maximum": 0.0,
          "Minimum": 0.0
        },
        {
          "time": "2026-09-11T13:45:00+08:00",
          "Average": 0.0,
          "Maximum": 0.0,
          "Minimum": 0.0
        }
      ]
    }
  ],
  "metric_limit": "Listener-level aggregate metrics, not per-request trace. Available points cover13:41–13:45, values zero; cannot prove the user request reached CLB or attribute individual attempts.",
  "nearby_application_error": {
    "time": "2026-09-11T13:42:05+08:00",
    "route": "/api/user/info",
    "message": "没有找到用户信息",
    "relation": "no evidence linking this to the upload; not taken as root cause"
  },
  "conclusion": "Real-time reproduction did not yield an upload/image request in the observed target services. Current evidence does not support a server-size-limit rejection. Investigate actual client upload URL, uploadFile success/statusCode or fail/errMsg, selected file readability and upload-domain configuration. Actual client error remains unobserved.",
  "pending_user_facts": [
    "file format",
    "whether files under1 MB have ever succeeded in the same entry"
  ],
  "not_captured": [
    "phone upload callback/runtime logs",
    "CLB per-request access logs because delivery is not configured",
    "file content or full request/response bodies"
  ]
}