Often times, you will run into obscure errors that require you to take a peek under the JVM hood, which in itself can be a daunting task. In this tutorial, we will take a look on how to troubleshoot a running application in a Kubernetes cluster with VisualVM as well as how to inspect Heap Dumps and how to pass them from the container to our machine. For this example, we have a Hello Spring Boot Application (the code can be found here) that saves a timestamp of each request in memory (in order to provide us some interesting data for us to analyze later on).