Symptoms
Consider the following scenario. You develop a multithreaded application by using the Microsoft Lync Server 2010 Group Chat SDK APIs. The application creates endpoints in multiple threads, and then makes all endpoints log on to the Group Chat server at the same time. In this scenario, the application throws the following unhandled exception:
{"Configuration of SDK logging failed: <>"}" at Microsoft.Rtc.Collaboration.GroupChat.GroupChatEndpoint.InitializeLogger() at Microsoft.Rtc.Collaboration.GroupChat.GroupChatEndpoint..ctor(Uri lookupServerAddress, LocalEndpoint ocs) at GcTestBot.GcConnectionManager.ConnectGroupChatServer(String userSipUri, LocalEndpoint userEndpoint, Uri lookupServerUri)"
Additionally, the message is logged in the Windows event log:
Resolution
To resolve this issue, install the following cumulative update:
2603298 Update package for Lync 2010 Group Chat SDK: December 2011
