How can i get the stack of one thread from another thread

hi !
i have a pool threads ,some times all therads in that pool are besy becouse somting lock the threads so there is no free thread to handle ... .
what i want is a way to get the stack of these thread so i can print them to see way they lock ...
thanks,
zvika

Maybe something like this (haven't actually tried it):
Add a method to your Threads to print the trace:
public class MyThread extends Thread {
    public void run() {
    public void printCurrentStack() {
        (new Exception()).printStackTrace(); // or whatever method you choose
MyThread mt = new MyThread();
mt.start();
mt.printCurrentStack();

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