Thanks for the feedback :) The bugs are being fixed. Frankly speaking, I didn't expect this exercise to get such popularity :D Anyways, the primary purpose of the task is to test how various distributed tracing tools (Jaeger, Zipkin, Instana, etc) integrate with into a polyglot distributed app (yup, the company I work for uses more than 3 languages and frameworks). But now it looks that this toy needs to be maintained properly.