HttpClient - task was cancelled

最新推荐文章于 2025-07-01 17:50:54 发布

Henry_Wu001

最新推荐文章于 2025-07-01 17:50:54 发布

阅读量2.1k

点赞数

CC 4.0 BY-SA版权

分类专栏： vs2010

本文链接：https://blog.youkuaiyun.com/Henry_Wu001/article/details/73787407

vs2010 专栏收录该内容

48 篇文章

订阅专栏

本文探讨了使用C#的HttpClient时遇到的任务被取消错误。详细分析了默认超时设置为100秒的原因，以及在网络限制下如何影响大量请求的处理。文章还提到一些可能的解决方案，包括绕过限制的方法及确保应用适用于64位平台。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

refs:

https://stackoverflow.com/questions/19120675/httpclient-task-was-cancelled-how-to-get-the-exact-error-message

使用c#的httpClient时，发现运行一段时间后任务会cancelled报错，

查原因如下:

The default HttpClient.Timeout value is 100 seconds (00:01:40). If you do a timestamp in your catch block you will notice that tasks begin to get canceled at exactly that time. Apparently there is a limited number of HTTP requests you can do per second, others get queued. Queued requests get canceled on timeout. Out of all 600k of tasks I personally got only 2500 successful, others got canceled.

I also find it unlikely, that you will be able to run the whole 600000 of tasks. Many network drivers let through high number of requests only for a small time, and reduce that number to a very low value after some time. My network card allowed me to send only 921 requests within 36 seconds and dropped that speed to only one request per second. At that speed it will take a week to complete all the tasks.

If you are able to bypass that limitation, make sure you build the code for 64-bit platform as the app is very hungry for memory.