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openjdk-8-jre-headless is OpenJDK Java runtime, using Hotspot JIT (headless) 20eb08d56f9496cba7ae5bc1fc762f93 OpenJDK Java runtime, using Hotspot JIT (headless) 20eb08d56f9496cba7ae5bc1fc762f93 Introduction Still having problems? See the Troubleshooting Guide, let us know using the Feedback page or file a bug.In this tutorial we learn how to install openjdk-8-jre-headless on Ubuntu 20.04. Local Applications Cannot Be Detected dialog is shown after VisualVM startup: this can happen on Windows systems, see the Troubleshooting Guide for more details and steps to fix the problem.VisualVM startup terminates by Warning - could not install some modules message: this can happen if you unzip the VisualVM archive over an older VisualVM version, make sure you are unzipping the VisualVM to a new directory.VisualVM startup terminates by Error Starting VisualVM Dialog - unsupported version of Java: this typically happens when JRE or incorrect JDK version is used to run VisualVM, make sure VisualVM is running using Oracle JDK 8+.Incorrectly set VisualVM user directory - if you have defined VisualVM user directory manually, make sure it is outside of VisualVM installation directory.Incorrectly set JDK for running VisualVM - if you have defined a JDK to run VisualVM manually, make sure the path to the JDK is correct and doesn't end with a slash.Incorrect JDK is used for running VisualVM - if you haven't defined a JDK to run VisualVM manually, make sure that the default Java on your system is Oracle JDK 8+.VisualVM waits for license confirmation - make sure you haven't overlooked the License Agreement dialog.The download is broken - make sure you've got the correct bits (archive managers typically notify you when the archive is broken).VisualVM doesn't start: there are several problems which could prevent VisualVM from starting without any obvious reason:.Check out the Getting Started document, it's designed to help you start using VisualVM.You may provide additional options to define JDK and/or VisualVM user directory: Visualvm\bin\visualvm.exe or visualvm/bin/visualvm Start VisualVM by invoking the binary appropriate for your OS:.The archive already contains the top-level visualvm directory.