Majority of WCF requests missing

[lmnash]

Hi

We have been using this SDK to monitor our main WCF service (hosted in a Windows Service) very successfully.

I am now trying to use it to monitor another WCF service (hosted in a different Windows Service) and for some reason I only see around 10% of the requests appearing in the portal. I know exactly what requests have been sent because I am monitoring it while running an automated test suite. I've checked my limits in the portal.

I have removed adaptive sampling from the ApplicationInsights.config. I have monitored the trace output using PerfView.exe and cannot see any errors or concerning messages. I downloaded the SDK code, built and deployed it and stepped through the various modules in debugger and cannot see anything obviously wrong. I switched the WCF service and test suite to net.tcp and http (usually uses a custom binding). None of these helped at all.

From trial and error it appears the first 2-3 requests are reported ok, and after that only further requests to those same operations are reported. All other requests are not reported until the service is restarted.

So I am completely stuck! Can anyone suggest a way forward?