Question

I have an app that calls a WCF service in high frequency. The app starts out working fine and then after a few minutes, every call starts generating this error:

System.TimeoutException: The request channel timed out attempting to send after 00:02:00. Increase the timeout value passed to the call to Request or increase the SendTimeout value on the Binding.

I’ve tried everything I can think of to get around this error, such as:

• Setting multiple concurrencymode on the service:


[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]
public class ListingService : IListingService


• Setting higher limits for max concurrent calls/sessions/instances in the service web.config:


serviceThrottling maxConcurrentCalls="100000" maxConcurrentSessions="100000" maxConcurrentInstances="100000"


• Setting a higher servicepointmanager defaultconnectionlimit on application_start on the service’s global.asax:


protected void Application_Start(object sender, EventArgs e)
{
System.Net.ServicePointManager.DefaultConnectionLimit = 100000;
}


• Making sure I’m closing client connections:


using (var client = new ListingServiceClient())
{
client.SaveListing(listing);
client.Close();
}


Here is the services web.config – http://pastebin.com/d9qtZUKN

However, I’m still getting the error. I’m sure that the service call does not take that long. Any ideas?

Answer 1

The issue was the db timing out which caused WCF to time out.