How to get stack trace of blocked statements in JMC Console?

Question

I'm using Java Mission Control to profile my application. Amongst the useful metrics in the "Threads" tab is the number of times each thread was blocked. However, I can't seem to find a way to get which lines of code threads were blocked on. Is there a way - either programatically or via JMC - to work out where the blocking is occuring?

Answer 1

You can see the different stack traces in the Hot Methods subtab on the Threads/Hot Threads tab, click a thread to see the stack traces only for that.

In JMC 6 you see the same info in the Lock Instances page, and the stack traces in the Stack Trace view.