Chasing the bottleneck: True story about fighting thread contention in your code


Today I’m going to share some valuables lessons learned about developing highly concurrent software. These are real life lessons that come straight from the development of the Mule ESB. This is a story about deadlocks, context switches, CPU usage and profiling, focusing in how to diagnose this issues which is often the hardest part of the solution.

So the story begins a couple of weeks ago when I started working on a new feature for Mule 3.5.0.