For containerized environments, add JDK installation to your Dockerfile:
Since jstack is bundled with the JDK, you cannot install it as a standalone tool. Installing the JDK automatically provides access to jstack.
sudo -u appuser jstack <PID>
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You can choose to install the default Ubuntu JDK or a specific version (such as OpenJDK 11, 17, or 21) depending on your application requirements. Option A: Install the Default Ubuntu JDK (Recommended) install jstack on ubuntu
If you need a specific JDK version not available in the Ubuntu repositories, use this method.
Before beginning, update your local package index to ensure you download the latest available software versions. sudo apt update Use code with caution. Option 1: Install the Default JDK (Recommended) For containerized environments, add JDK installation to your
Finally, confirm that jstack works by checking its version:
The -l flag adds lock information and will explicitly report found deadlocks at the end. This link or copies made by others cannot be deleted
On many Ubuntu systems, running jstack on a Java process owned by another user (e.g., Tomcat, Jenkins) requires root privileges or that the user matches the process owner. If you get Operation not permitted , prepend sudo :
Before installing, verify if jstack is already available on your system by checking the version: jstack -version Use code with caution.