To take a thread dump of a running Java process, find the and run: jstack > threaddump.txt Use code with caution. Copied to clipboard
This guide will show you how to install jstack on Ubuntu 20.04, 22.04, and 24.04 LTS using the APT package manager. Prerequisites An Ubuntu system (20.04, 22.04, or 24.04). A user account with sudo privileges. An active internet connection. 1. Update Your Package List
If you need a specific JDK version not available in the Ubuntu repositories, use this method.
If you installed the JDK but jstack still isn't recognized, you may need to add the Java bin directory to your system PATH or use update-alternatives : sudo update-alternatives --config java Use code with caution. Copied to clipboard install jstack on ubuntu
To generate a thread dump, jstack needs the Process ID (PID) of your running Java application. 1. Find the Java Process ID
To get jstack on Ubuntu, you don't install it as a standalone tool; it is included as part of the . If you only have the Java Runtime Environment (JRE) installed, you will not have access to jstack . 1. Check if Java is already installed
This option attempts to print both Java frames and native (C/C++) frames. However, on modern JDK versions (JDK 8 and later) it often produces limited useful output and is not recommended. Consider using perf or async‑profiler for native stack analysis. To take a thread dump of a running
Save and exit the file (in Nano, press Ctrl+O , Enter , then Ctrl+X ).
jcmd <pid> Thread.print
Run the following commands to update your package list and install the default JDK: sudo apt update sudo apt install default-jdk Use code with caution. A user account with sudo privileges
If your application requires a specific Java version (such as Java 11, 17, or 21), you can install it directly: sudo apt install openjdk-21-jdk -y For Java 17: sudo apt install openjdk-17-jdk -y For Java 11: sudo apt install openjdk-11-jdk -y Step 4: Verify the jstack Installation
1.8.0_392