How do you reproduce bugs that occur sporadically?

Question

We have a bug in our application that does not occur every time and therefore we don\'t know its \"logic\". I don\'t even get it reproduced in 100 times today.

Disclaime

Answer 1

Add some sort of logging or tracing. For example log the last X actions the user committed before causing the bug (only if you can set a condition to match bug).