TraceListener in OWIN Self Hosting

Question

I am using Microsoft.Owin.Hosting to host the following, very simple web app.

Here is the call to start it:

WebApp.Start<PushServerStartup>("http://localhost:8080/events"); 

Here is the startup class I am using:

public class PushServerStartup {     public void Configuration(IAppBuilder app)     {         app.MapHubs();     } } 

I am running this inside a console application that does a lot of other things including routing trace writing to certain files etc. But all of a sudden (when activating the OWIN hosting) I am seeing trace messages written to the console that are normally routed somewhere else.

Obviously there are some trace listeners active in the OWIN hosting framework. How can I switch them off?

Answer 1

I had the same issue, I was self hosting 4 instances in one process and for each request was getting 4 lots of messages traced to console.

I simply removed the TraceListener instance

Trace.Listeners.Remove("HostingTraceListener") 

"HostingTraceListener" is defined in the owin source code so I guess could change - http://katanaproject.codeplex.com/SourceControl/latest#src/Microsoft.Owin.Hosting/Engine/HostingEngine.cs

I did this after

WebApp.Start(...