{
  "id": "go/sql-connection-pool-timeout",
  "signature": "sql: database is closed",
  "signature_zh": "sql: 数据库已关闭",
  "regex": "sql:\\ database\\ is\\ closed",
  "domain": "go",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "在调用db.Close()后继续使用数据库连接",
  "root_cause_type": "generic",
  "root_cause_zh": "在调用db.Close()后继续使用数据库连接",
  "versions": [
    {
      "version": "1.17",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "未同步可能导致多个连接实例",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "导致后续操作全部失败",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.9,
      "how": "使用sync.Once确保Close只调用一次",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.8,
      "how": "在应用生命周期结束时才关闭数据库",
      "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": 0.84,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-09-20",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}