异步套接字阅读：发起线程一定不能退出 - 怎么办？ [英] Asynchronous socket reading: the initiating thread must not be exited - what to do?

问题描述

我有一个的NetworkStream我读异步（使用异步/等待）

I have a NetworkStream which I read asynchronously (using async/await)

await Task<int>.Factory.FromAsync((cb, state) => stream.BeginRead(buffer, offset, readLen - offset), stream.EndRead, null);

不幸的是，一个IO异常，有时会出现：由于线程退出或应用程序请求的I / O操作已中止。

Unfortunatly, an io exception sometimes occurs: "The I/O operation has been aborted because of either a thread exit or an application request."

我相信我打Socke.EndReceive文件的要求：的http：// msdn.microsoft.com/en-us/library/w7wtt64b.aspx 。其中规定：

I believe I hit a requirement documented in Socke.EndReceive: http://msdn.microsoft.com/en-us/library/w7wtt64b.aspx . Which states:

所有I / O由给定线程启动被取消时，该线程
  退出。未处理的异步操作可能会失败，如果线程退出
  操作完成之前。

All I/O initiated by a given thread is canceled when that thread exits. A pending asynchronous operation can fail if the thread exits before the operation completes.

由于异步方法上的默认调度程序运行，这种要求不能得到保证。

Because the async method runs on the default scheduler, this requirement cannot be assured.

有没有办法解决？我是否需要启动一个专用的线程来启动I / O？

Is there a way around this? Do I need to start a dedicated Thread to initiate I/O?

最好的问候，德克

推荐答案

我也问过的parallelextensions论坛同样的问题：

I have asked the same question on the parallelextensions forum:

<一个href=\"http://social.msdn.microsoft.com/Forums/en-US/parallelextensions/thread/d116f7b0-c8ee-4ce4-a9b8-4c38120e45a4\" rel=\"nofollow\">http://social.msdn.microsoft.com/Forums/en-US/parallelextensions/thread/d116f7b0-c8ee-4ce4-a9b8-4c38120e45a4

基本上，线程池不会停止有异步I / O挂起任何线程。所以，只要一开始就应该不会出现这个问题的线程池的套接字操作。

Basically, the ThreadPool will not stop any threads that has asynchronous I/O pending. So as long as one starts the socket operation on the ThreadPool this problem should not occur.

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