Prometheus Error: Collector already registered that provides name: http_client_requests_count

Question

I'm seeing this odd Prometheus-related error:

RESTful call failed. Cause: Collector already registered that provides name: http_client_requests_count 

I didn't include a http_client_requests_count metric in my project -- so what gives? Where the heck is this coming from?

Answer 1

This is probably due to the context being reloaded, and thus collectors trying to re-register to the static CollectorRegistry.defaultRegistry.

See more info and work-arounds here: https://github.com/prometheus/jmx_exporter/issues/290