Application Observability Code Challenges are a way to challenge yourself to improve the observability of a sample application. Of course, this application has some surprises that you probably did not expect. These challenges will help you develop an observability mindset and become more familiar with your observability tools.

The first of the Application Observability Code Challenges is now available. A simple Spring Boot application with a REST endpoint implemented in Jersey/JAX-RS This application has some unexpected behaviour. Can you find out what is happening based on the observability data? Can you improve the observability to prove that a fix really fixed the problems?