How to write a Java deadlock program and analyze jstack

This article will explain in detail how to write a Java deadlock program and analyze jstack. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

So how to write a Java deadlock program? The code is very simple, I have written it and everyone can understand it.

The code is simple: two threads each acquire one of the locks without releasing the held lock, and then try to acquire the other lock.

Then, let's take a look at the information through jps and jstack 8902 > jstack_deadlock.log.

Let's take a look. Deadlock Deadlock status.

As you can see from the above, Thread-0 locks locked (the object of a java.lang.Object lock). Then waiting to lock waits for another memory address, the object, to be locked.

Thread-1 locks locked (the object of a java.lang.Object lock). Then waiting to lock waits for another memory address, the object, to be locked.

Jstack also clearly lists the status of the relevant thread java.lang.Thread.State: BLOCKED (on object monitor).

Take another look at the stack information for the threads listed by jstack:

Navigate to lines 24 and 42 of the relevant Java code DeadLockTest.java.

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