Time-out occurs when an application calls the Poll method

Original product version:   .NET Core

Symptom

A time-out occurs when you run an application that is 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 happens, the Poll method returns false.

Cause

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

Workaround

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

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