Once the installation is complete, verify that jstack is available by checking its version. This confirms the binary is in your system's PATH.
sudo apt update sudo apt install openjdk-17-jdk # or 11, 21, etc.
It is critical to note that jstack is included in the Java Runtime Environment (JRE). The JRE is designed solely for running Java programs, while the JDK is the full development kit that includes all the diagnostic tools like jstack . Therefore, if your system only has a JRE, you will not be able to use jstack . The same logic applies to java and javac commands: having java available confirms only that the JRE is present; to install jstack , you must have the JDK on your system.
Typical output: /usr/bin/jstack
jstack <PID> > thread_dump.txt
# For Java 17 sudo apt install openjdk-17-jdk # For Java 11 sudo apt install openjdk-11-jdk Use code with caution. Copied to clipboard 3. Locate and Test
This option provides additional details about java.util.concurrent locks and synchronizers. install jstack on ubuntu
: It's always a good practice to ensure your package lists are up to date before installing new software. Open a terminal and run:
Match the version number from the previous step to the installation command: sudo apt install openjdk-17-jdk-headless -y Use code with caution. Troubleshooting Common Errors
This will print the entire stack trace of all threads directly to your terminal. Once the installation is complete, verify that jstack
jstack is a command-line utility that comes bundled with the Java Development Kit (JDK). It is used to print Java stack traces of Java threads for a specified Java process. This tool is invaluable for developers and system administrators who need to debug applications, diagnose deadlocks, or identify performance bottlenecks (CPU spikes).
By mastering these tools, you'll be well-equipped to maintain the stability and performance of your Java software on the Ubuntu platform.
This error often indicates the target process is a system process (PID 1) or you lack necessary permissions. It is critical to note that jstack is
grep -i deadlock deadlock_dump.txt