jcmd <pid> help
Alternatively, you can install a specific version of JDK, such as OpenJDK 11:
Common locations:
Don't just dump the output to the screen; save it for analysis: jstack > thread_dump.txt Use code with caution. Copied to clipboard If you're still having trouble, I can help you: Find your Process ID (PID) Troubleshoot "Permission Denied" errors Analyze the thread dump once you've generated it
jstack 2345 > threaddump.txt
Run the command with sudo and match the user ID of the running Java application: sudo -u jstack Use code with caution. Error: "ptrace_attach failed"
is a troubleshooting tool specifically included in the JDK package. Stack Overflow 1. Update your package list install jstack on ubuntu
Ubuntu provides a meta-package called default-jdk . This package automatically installs the standard, stable version of OpenJDK recommended for your specific Ubuntu release. Step 1: Install the package Run the following command to install the default JDK: sudo apt install default-jdk -y Use code with caution. Step 2: Verify the installation Check that the Java compiler and jstack are now available: javac -version jstack -v Use code with caution. Option 2: Install a Specific OpenJDK Version
Run the command by impersonating the exact user account running the Java application: sudo -u jstack Use code with caution. Error: "insufficient memory or insufficient privileges" jcmd <pid> help Alternatively, you can install a