Pinpoint v1.5.0 opensource APM
Pinpoint is an open source APM (Application Performance Management) tool for large-scale distributed systems written in Java.
When healthchecks.io started to receive more than 1 request per second, it became clear I could not just go on carelessly restarting web servers after code deploys. For a monitoring service, it would be bad form to miss even a few HTTP requests. And, going forward, if the server gets busier, the problem only becomes bigger.