Install Jstack On Ubuntu -

jstack is a JVM diagnostic utility that prints Java thread stack traces for a running Java process. It’s part of the JDK (Java Development Kit). On Ubuntu, you obtain jstack by installing an appropriate JDK (OpenJDK or Oracle JDK). This report covers prerequisites, installation options, common commands, permissions, troubleshooting, and verification.

This should help you get jstack installed and working on your Ubuntu system. install jstack on ubuntu