Aspnet Instrumentation OTEL Filters
I ran into an interesting problem using the Open Telemetry packages in a dotnet 8 application. We have a service that gets hammered, roughly 3b events a month so I created a custom filter to sample specific routes. After deploying the update I noticed my should be 90% reduction only went down by about half. I did some local testing and reviewed the data only to find the filter predicate was never even invoked from a specific appliance we have out in the field. It’s an old windows CE device using HTTP 1.1. Aside from that I don’t notice anything different about the request. Unfortunately these devices can’t be updated or at least not quickly as there are several thousand out in the field. Is there a different filter mechanism I can use as apposed to the packages OTEL middleware that may happen further down stream?
