Why does the MongoDB Java driver uses a random number generator in a conditional?

Question

I saw the following code in this commit for MongoDB's Java Connection driver, and it appears at first to be a joke of some sort. What does the following code do?

if (!((_ok) ? true : (Math.random() > 0.1))) {

return res; 

}

Answer 1

The reason why MongoDB Java driver uses a random number generator in a conditional because the surrounding negation and excessive parentheses convolute things further. Keeping in mind De Morgan's laws it is a trivial observation that this piece of code amounts to

if (!_ok && Math.random() <= 0.1) 

return res;