python network_error ai_generated true

sqlalchemy.exc.OperationalError：(psycopg2.OperationalError) 无法将主机名 "db.example.com" 转换为地址：名称解析临时失败

sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) could not translate host name "db.example.com" to address: Temporary failure in name resolution

ID: python/sqlalchemy-connection-ssl-error

其他格式: JSON · Markdown 中文 · English
80%修复率
85%置信度
0证据数
2025-11-10首次发现

版本兼容性

版本状态引入弃用备注
3.x active — — —

根因分析

数据库主机名的 DNS 解析失败。

English

DNS resolution failure for database hostname.

generic

解决方案

  1. 90% 成功率 Check DNS configuration and network connectivity. 
    nslookup db.example.com
ping db.example.com
  2. 85% 成功率 Use IP address temporarily and fix DNS. 
    engine = create_engine('postgresql://user:[email protected]/dbname')

无效尝试

常见但无效的做法:

  1. Hardcoding IP address in connection string. 60% 失败

    IP may change; not portable.

  2. Increasing connection timeout. 80% 失败

    DNS failure persists regardless of timeout.