{
  "id": "python/sqlalchemy-missing-session-rollback",
  "signature": "sqlalchemy.exc.PendingRollbackError: Can't reconnect until invalid transaction is rolled back. Please rollback() fully before proceeding.",
  "signature_zh": "SQLAlchemy 待回滚错误：无法重新连接，直到无效事务被回滚，请先完整执行 rollback()。",
  "regex": "sqlalchemy\\.exc\\.PendingRollbackError:\\ Can't\\ reconnect\\ until\\ invalid\\ transaction\\ is\\ rolled\\ back\\.\\ Please\\ rollback\\(\\)\\ fully\\ before\\ proceeding\\.",
  "domain": "python",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "事务中发生异常后未回滚，会话处于待回滚状态，后续操作被阻止。",
  "root_cause_type": "generic",
  "root_cause_zh": "事务中发生异常后未回滚，会话处于待回滚状态，后续操作被阻止。",
  "versions": [
    {
      "version": "1.4.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "2.0.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "尝试直接调用 session.close()，但未回滚事务，导致连接池中的连接状态混乱。",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "忽略异常继续执行其他数据库操作，会持续抛出相同错误。",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.95,
      "how": "在异常处理中调用 session.rollback()，然后重新开始新事务，例如：try: session.commit() except: session.rollback()",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.9,
      "how": "使用上下文管理器 with session.begin(): 自动处理回滚。",
      "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": 0.87,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-04-10",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}