What are some real-world examples of deadlocks in Java?

What are some real-world examples of deadlocks in Java?

Deadlocks in Java occur when two or more threads are blocked forever, each waiting for the other to release a resource. A common example is when Thread A holds Resource 1 and waits for Resource 2, while Thread B holds Resource 2 and waits for Resource 1.

Can you give me a specific scenario where this happens?

Sure! Imagine a banking application where Thread A is processing a transfer from Account X to Account Y, locking Account X first. Meanwhile, Thread B is processing a transfer from Account Y to Account X, locking Account Y first. If both threads reach this state, they will be deadlocked.

How can we prevent deadlocks in Java?

To prevent deadlocks, you can use techniques like resource ordering, where you always acquire locks in a predefined order, or using a timeout mechanism when trying to acquire locks.

Are there any tools to detect deadlocks in Java applications?

Yes, tools like VisualVM and Java Mission Control can help detect deadlocks by analyzing thread dumps and monitoring thread states.