We updated telegraf to version 1.26.2 containing update of Wavefront sdk from 0.11.0 to 0.12.0 and telegraf calls to wavefront proxy are now failing with 404.
We use a Client side load balancer to proxy calls to wavefront proxy instances. Hence our Wavefront URL given to teegraf outputs is as below
http://localhost:29999/wavefront-proxy

With 0.12.0 the path in the URL gets stripped and the proxy calls fail with 404

with 0.11.0 the report URL used to be as below
http://localhost:29999/wavefront-proxy/report?f=wavefront

with 0.12.0 the report URL is as below
http://localhost:29999/report?f=wavefront
(the path parameter gets stripped)

the change in #122 seem to have caused the issue
esp these lines https://github.com/wavefrontHQ/wavefront-sdk-go/blob/master/senders/client_factory.go#L145-L146 where host and port are considered but the path in base URL gets stripped off