Install Jstack | On Ubuntu

sudo apt install openjdk-11-jdk # For Java 11 sudo apt install openjdk-17-jdk # For Java 17

The -l flag adds lock information and will explicitly report found deadlocks at the end.

:Check if jstack is now available in your system path: jstack -version Use code with caution. Does OpenJDK have a tool similar to jstack (Oracle Java)?

To get jstack , you must install the JDK. You can choose between OpenJDK (the open-source implementation) or Oracle JDK. OpenJDK is recommended for most Ubuntu users. Option A: Install the Default OpenJDK (Recommended) install jstack on ubuntu

The Java Development Kit (default-jdk) contains everything in the JRE, plus development and troubleshooting tools. jstack is strictly bundled inside the JDK.

28491 org.apache.catalina.startup.Bootstrap 29502 sun.tools.jps.Jps Use code with caution. In this scenario, 28491 is the PID for a Tomcat web server. 2. Generate a Thread Dump on Screen

For most users, the simplest method is to install the Ubuntu default JDK package, which currently provides OpenJDK 21 on the latest LTS releases: sudo apt update Install the JDK: sudo apt install default-jdk sudo apt install openjdk-11-jdk # For Java 11

jcmd <pid> Thread.print

How to Install jstack on Ubuntu: The Complete Guide In the world of Java development and production troubleshooting, jstack is one of the most critical command-line utilities in your arsenal. It allows developers and system administrators to print Java stack traces of threads for a given Java Virtual Machine (JVM). If your Java application is hanging, experiencing a deadlock, or consuming 100% CPU, jstack is the tool you need to diagnose the root cause.

If you see output like /usr/bin/jstack , it’s already installed. If you see command not found , proceed with the installation. To get jstack , you must install the JDK

If you want Ubuntu to manage the most stable, standard version for your OS release, run: sudo apt install default-jdk -y Use code with caution. Option B: Install a Specific Java Version

Then, run jstack with the PID: