(no subject)

[torkell]

The Java HashMap class is not synchronised (and that is explicitly documented). This results in... interesting behaviour if two or more threads try to modify a HashMap at the same time.

Apparently, one of the failure modes is for the put() method to get stuck in an infinite loop.

Comments

[olego.livejournal.com]

It's easier in C++: since nothing is synchronised, you shouldn't be surprised when you get strange multi-threaded behaviour. That's why we use tons of locks.