prometheus duplicate metrics #1941
Description
prometheus metrics endpoint return duplicate metrics and not updating them properly on a SimpleWebServer api endpoints.
Steps to reproduce
Created a sample repo which reproduces this issue. https://github.com/jayasai470/opentelemetry-cpp-sample
What is the expected behavior?
Get metrics without duplicates
What is the actual behavior?
# HELP http_server_duration_count 1.8.1
# TYPE http_server_duration_count counter
http_server_duration_count{method="GET",status="200",path="/api/health"} 3 1674066565733
http_server_duration_count{method="GET",status="200",path="/api/test"} 2 1674066565733
# HELP http_server_duration_count 1.8.1
# TYPE http_server_duration_count counter
http_server_duration_count{method="GET",status="200",path="/api/test"} 2 1674066566733
http_server_duration_count{method="GET",status="200",path="/api/health"} 3 1674066566733