.NET remoting service seemingly crashes, and stops responding to clients

Question

I have a .NET Remoting service which works fine most of the time. If an exception or error happens, it logs the error to a file but still continues to run.

However, about once every two weeks the service stops responding to clients, which causes the client appication to crash with a SocketException with the following message:

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

No exception or stack trace is written to our log file, so I can't figure out where the service is crashing at, which leads me to believe that it is somewhere outside of my code which is failing. What additional steps can I take to figure out the root cause of this crash? I would imagine that it writes something to an EventLog somewhere, but I am not super familiar with Windows' Event Logging system so I'm not exactly sure where to look.

Thanks in advance for any assistance with this.

EDIT: Forgot to mention, stopping or restarting the service does nothing, the service never responds. I need to manually kill the process before I can start the service again.

EDIT 2:

public class ClientInfoServerSinkProvider :
       IServerChannelSinkProvider
   {
      private IServerChannelSinkProvider _nextProvider = null;

      public ClientInfoServerSinkProvider()
      {
      }

      public ClientInfoServerSinkProvider(
              IDictionary properties,
              ICollection providerData)
      {
      }

      public IServerChannelSinkProvider Next
      {
         get { return _nextProvider; }
         set { _nextProvider = value; }
      }

      public IServerChannelSink CreateSink(IChannelReceiver channel)
      {
         IServerChannelSink nextSink = null;

         if (_nextProvider != null)
         {
            nextSink = _nextProvider.CreateSink(channel);
         }
         return new ClientIPServerSink(nextSink);
      }

      public void GetChannelData(IChannelDataStore channelData)
      {
      }
   }

   public class ClientIPServerSink :
       BaseChannelObjectWithProperties,
       IServerChannelSink,
       IChannelSinkBase
   {

      private IServerChannelSink _nextSink;

      public ClientIPServerSink(IServerChannelSink next)
      {
         _nextSink = next;
      }

      public IServerChannelSink NextChannelSink
      {
         get { return _nextSink; }
         set { _nextSink = value; }
      }

      public void AsyncProcessResponse(
              IServerResponseChannelSinkStack sinkStack,
              Object state,
              IMessage message,
              ITransportHeaders headers,
              Stream stream)
      {
         IPAddress ip = headers[CommonTransportKeys.IPAddress] as IPAddress;
         CallContext.SetData("ClientIPAddress", ip);
         sinkStack.AsyncProcessResponse(message, headers, stream);
      }

      public Stream GetResponseStream(
              IServerResponseChannelSinkStack sinkStack,
              Object state,
              IMessage message,
              ITransportHeaders headers)
      {
         return null;
      }

      public ServerProcessing ProcessMessage(
              IServerChannelSinkStack sinkStack,
              IMessage requestMsg,
              ITransportHeaders requestHeaders,
              Stream requestStream,
              out IMessage responseMsg,
              out ITransportHeaders responseHeaders,
              out Stream responseStream)
      {
         if (_nextSink != null)
         {
            IPAddress ip =
                    requestHeaders[CommonTransportKeys.IPAddress] as IPAddress;

            CallContext.SetData("ClientIPAddress", ip);
            ServerProcessing spres = _nextSink.ProcessMessage(
                    sinkStack,
                    requestMsg,
                    requestHeaders,
                    requestStream,
                    out responseMsg,
                    out responseHeaders,
                    out responseStream);
            return spres;
         }
         else
         {
            responseMsg = null;
            responseHeaders = null;
            responseStream = null;
            return new ServerProcessing();
         }
      }

Answer 1

The issue was due to a deadlock caused in my code, if memory serves I had two locking objects and I locked one from inside the other, essentially making them wait for each other. I was able to determine this by hooking up a debugger to the remote service.