Run the following command to verify that jstack is working:
Which (11, 17, 21, etc.) does your application use? Are you running Java inside a Docker container on Ubuntu?
jstack -h If successful, you will see a list of help options. Comparison of Installation Methods
ps aux | grep java
Example output:
Installing jstack on Ubuntu is a crucial step for debugging Java applications. This command-line utility prints Java thread stack traces, helping you diagnose performance bottlenecks and deadlocks.
Then, run jstack with the PID:
Use the jps (Java Virtual Machine Process Status Tool) command to list all running Java processes: jps -l Use code with caution. Alternatively, use the standard Linux ps command: ps -ef | grep java Use code with caution. 2. Generate a Thread Dump
: First, identify the exact path to your JDK. For an APT installation, it's typically in /usr/lib/jvm/ . For the manual installation we performed, it's /opt/jdk-17/ .
sudo apt install openjdk-17-jdk
: The equivalent of jstack is the Thread.print command.
If you are currently debugging a live application issue, tell me: What are you targeting? What error message (if any) are you seeing in your console?
If your project requires a specific Java version, install it directly: sudo apt install openjdk-21-jdk -y Use code with caution. OpenJDK 17: sudo apt install openjdk-17-jdk -y Use code with caution. OpenJDK 11: sudo apt install openjdk-11-jdk -y Use code with caution. Step 4: Verify the Installation install jstack on ubuntu
If your application relies on a specific version of Java (such as Java 8, 11, 17, or 21), install that specific OpenJDK headless or full package: 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 For Java 8: sudo apt install openjdk-8-jdk -y Step 4: Verify the jstack Installation