package, which provides the recommended version for your Ubuntu release. Update your package list: sudo apt update Use code with caution. Copied to clipboard Install the JDK: sudo apt install default-jdk Use code with caution. Copied to clipboard Alternatively, for a specific version like OpenJDK 11: sudo apt install openjdk-11-jdk Ask Ubuntu 3. Verify the installation After installation, confirm that is now accessible: which jstack Use code with caution. Copied to clipboard This should return a path like /usr/bin/jstack TheServerSide How to use jstack Once installed, you can generate a thread dump for a running Java process by finding its Process ID (PID) and running: jstack > thread_dump.txt Use code with caution. Copied to clipboard How to install jstack on Redhat 8 - Atlassian Community
In Docker containers, ptrace is often disabled by default as a security measure.
. It is not included in the standard Java Runtime Environment (JRE). DigitalOcean 1. Update your system Ensure your package list is up to date: sudo apt update Use code with caution. Copied to clipboard 2. Install the Default JDK The easiest way is to install Ubuntu's default JDK package: sudo apt install default-jdk Use code with caution. Copied to clipboard
Now that jstack is successfully installed, you can use it to inspect a running Java application. 1. Find the Java Process ID (PID) install jstack on ubuntu
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-11-jdk
You must run jstack with the same user privileges as the running Java process. package, which provides the recommended version for your
sudo apt install openjdk-11-jdk # For Java 11 sudo apt install openjdk-17-jdk # For Java 17
sudo apt update
A key point to remember is that jstack is not available in the Java Runtime Environment (JRE); it is exclusively part of the full JDK. This means you cannot simply have the JRE installed to run Java applications and expect jstack to be available. You need the full development kit. Copied to clipboard Alternatively, for a specific version
This is a popular Long-Term Support (LTS) version, known for its stability and widespread use.
The user running jstack does not match the user running the Java application.
Note: The -headless variant is ideal for production servers as it excludes GUI libraries, saving disk space. Step 4: Verify the Installation