{
  "id": "go/grpc-unavailable-dns-resolution",
  "signature": "rpc error: code = Unavailable desc = failed to resolve service name: no such host",
  "signature_zh": "rpc 错误：代码 = Unavailable 描述 = 无法解析服务名称：没有这样的主机",
  "regex": "rpc\\ error:\\ code\\ =\\ Unavailable\\ desc\\ =\\ failed\\ to\\ resolve\\ service\\ name:\\ no\\ such\\ host",
  "domain": "go",
  "category": "network_error",
  "subcategory": null,
  "root_cause": "DNS resolution fails because the target hostname does not exist or DNS server is unreachable.",
  "root_cause_type": "generic",
  "root_cause_zh": "DNS 解析失败，因为目标主机名不存在或 DNS 服务器不可达。",
  "versions": [
    {
      "version": "1.56.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "1.57.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Hardcoding an IP address instead of hostname.",
      "why_fails": "IP may change, causing future failures.",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "Retrying indefinitely without fixing DNS.",
      "why_fails": "DNS issue persists.",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    },
    {
      "action": "Modifying system DNS settings.",
      "why_fails": "May not be applicable in containerized environments.",
      "fail_rate": 0.5,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.85,
      "how": "resolver := &customResolver{}; conn, err := grpc.Dial(\"dns:///service.example.com:50051\", grpc.WithResolvers(resolver))",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.9,
      "how": "nslookup service.example.com; verify /etc/resolv.conf",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.8,
      "how": "conn, err := grpc.Dial(\"127.0.0.1:50051\", grpc.WithInsecure())",
      "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": 0.85,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-09-01",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}