Time-out occurs when an application calls the Poll method

Applies to: .NET Core

Symptoms

A time-out occurs when you run an application that's using the System.Net.Security.SslStream class and that calls the System.Net.Socket.Poll method to check data on the underlying socket. When this issue occurs, the Poll method returns a value of false.

Cause

The SslStream class is reading data from the socket faster than the application can read data from the stream buffer.

Solution

To work around this issue, use one of the following methods:

• Don't use the Poll method in the application. Instead, use the Asynchronous Programming Model (APM) pattern to get callbacks when data arrives.
• If you must use the Poll method, when the method returns a value of true, make sure that all the stream buffer data was read before you enter another Poll call.