unity network_error ai_generated true

UnityWebRequest: 超时错误: DNS解析超时

UnityWebRequest: Timeout error: DNS resolution timed out

ID: unity/network-unitywebrequest-timeout

其他格式: JSON · Markdown 中文 · English
90%修复率
87%置信度
1证据数
2023-10-05首次发现

版本兼容性

版本状态引入弃用备注
Unity 2021.3 active — — —
Unity 2022.3 active — — —
Unity 2023.1 active — — —

根因分析

UnityWebRequest在默认超时时间（通常10秒）内无法解析主机名，通常是由于网络配置问题、DNS服务器不可用或URL错误。

English

The UnityWebRequest could not resolve the hostname within the default timeout period (typically 10 seconds), often due to network configuration issues, DNS server unavailability, or incorrect URL.

generic

官方文档

https://docs.unity3d.com/ScriptReference/Networking.UnityWebRequest-timeout.html

解决方案

  1. 检查URL是否有拼写错误，并确保主机名可通过浏览器或ping访问。如果URL正确，在设备的网络设置中配置自定义DNS服务器，或使用UnityWebRequest的timeout属性设置为合理值（例如15秒）以允许重试。
  2. 实现带有指数退避的重试机制：如果请求因DNS超时而失败，等待2秒并重试最多3次。使用协程配合yield return new WaitForSecondsRealtime(2f);
  3. 在移动平台上，确保应用程序具有INTERNET权限（Android）或在Info.plist中允许网络访问（iOS）。

无效尝试

常见但无效的做法:

  1. 90% 失败

    This only delays the error; if DNS resolution fails permanently, the request will eventually time out anyway. It does not fix the underlying DNS issue.

  2. 85% 失败

    IP addresses can change, and many services require hostname-based virtual hosting. This is not a scalable or reliable fix.

  3. 95% 失败

    The protocol does not affect DNS resolution; the error occurs before the HTTP handshake. This change is irrelevant.