If you see a version output, jstack is already installed. If you get command not found , proceed with installation.
grep -A 10 "Found one Java-level deadlock" thread_dump_*.txt
JStack is a command-line tool that comes with the JDK (Java Development Kit). It allows you to take a snapshot of the JVM thread stacks, which can be used to diagnose and troubleshoot Java applications. JStack is particularly useful when you're experiencing performance issues, deadlocks, or other problems with your Java application.
Before running jstack on a production system, be aware that attaching to a JVM may cause a slight performance impact. For most applications, this impact is minimal and temporary. install jstack on ubuntu
Check that jstack is available by requesting its version or help menu: jstack -version Use code with caution. Method 2: Install a Specific OpenJDK Version
# For JDK 11 sudo apt install openjdk-11-jdk
sudo apt remove default-jdk
jstack must match the version of the Java process you are debugging. Check your current version by running: java -version Use code with caution. Copied to clipboard 2. Install the JDK
On Ubuntu, installing the standard Runtime Environment (JRE) does not include jstack . The utility is bundled exclusively with the . If you get a jstack: command not found error, you simply need to install the JDK package that matches your running Java version. Step 1: Check Your Current Java Version
You can install the Default Ubuntu JDK or a specific version depending on your production requirements. Option A: Install the Default JDK (Recommended) If you see a version output, jstack is already installed
Find the PID of your running Java application using jps (Java Virtual Machine Process Status Tool): jps -l Use code with caution. Alternatively, use the standard Linux command: ps aux | grep java Use code with caution. 2. Generate a Thread Dump
You need the target process ID to run the utility. Find it using jps (Java Virtual Machine Process Status Tool): jps -l Use code with caution. 2. Generate a Thread Dump
find / -name jstack 2>/dev/null
Ubuntu is a popular Linux distribution that's widely used in production environments. If you're running Java applications on Ubuntu, having JStack installed can be a lifesaver when it comes to troubleshooting issues. With JStack, you can:
Then, add it to your PATH in ~/.bashrc :
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