An Application Observability Code Challenge with virtual threads. Spot the difference between system thread and virtual thread usage for the same application with some problems.

The third and final day of the hackathon. During this hackathon I learned a lot about Quarkus, LangChain4j, Grafana MCP and many other things. Read this blog to read the progress of the last day and my conclusions of the hackathon.

The second day of the hackathon was a mix of activities. Next to the hackathon, we had a climbing outdoor activity. In this blog post I will share the results of the hackathon on day 2 and some pictures of the climbing activity.

Together with my colleagues of OpenValue Utrecht we are having a hackathon at a nice place in the south of Belgium. The goal of the hackathon is to build a monitoring buddy, a chatbot that can help you with your monitoring and observability questions. I will use Quarkus, LangChain4j, Tools and MCP in combination with Observability to build this chatbot. This blog post describes the progress on Day 1.

The first of the Application Observability Code Challenges step by step revealed. The application has some unexpected behaviour. In this post I will explain step by step what you can learn from the metrics and how you can improve the observability of the application to finally find the real problem.

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?

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.

Your local development of a Grafana plugin or dashboard may lack representative data. Connecting to production data sources may be impossible, but there are other ways to connect. Read more to find out how to use Grafana as a proxy to access the data.

The power of observability becomes visible when you combine signals and put it all together. Checks performed by Checkly can provide a piece of the puzzle that gives you a better view of what is happening. It would be really nice if you could combine the data from Checkly in the same Grafana dashboards as your other observability data. This post describes how to bring it together and how to add Grafana annotations to your dashboard based on Checkly results.

Updates from Checkly Based on my previous post I have been in contact with Checkly about two parts that were not working as expected. I have some updates on these topics today. Sending traces from Checkly to Tempo In the previous post I mentioned that the traces in my Grafana environment showed root span not yet received. The root span was not available. This requires Checkly to send these spans to my environment as well.