This article was created in response to a support issue logged with K2. The content may include typographical errors and may be revised at any time without notice This article is not considered official documentation for K2 software and is provided "as is" with no warranties.

Issue

Starting K2 Five 5.3, if you are trying to use Fiddler as proxy with K2HostServer to capture server side calls, the K2 Server service won't start and will display an error as below:

"ErrorMessage","SourceCode.Hosting.Server.Runtime.HostLoadBalancedServerManager.Poll","0 System.Exception: Error (401) Unauthorized.

   at SourceCode.Configuration.Client.Extensions.RestSharpExtensions.EnsureSuccess[T](IRestResponse`1 response)

   at SourceCode.Configuration.Client.ConfigurationClient.GetServices()

   at SourceCode.Hosting.Server.Runtime.HostLoadBalancedServerManager.Poll()"

Symptoms

The K2 HostServer fails to start.

Troubleshooting Steps

Workaround

  • Export the “Environment Owner” certificate as ClientCertificate.cer (the file must be named as ClientCertificate.cer)

Image

      • No need to export the private key
      • Place the ClientCertificate.cer under %USERPROFILE%\My Documents\Fiddler2\ClientCertificate.cer
      • Restart Fiddler
      • Start the K2 Server.

Cause
K2 Configuration Service uses client certificate authentication and Fiddler does not know which certificate to present to it.