cooperative-computing-lab/cctools — pull request #363 by dthain (2014-02-04 22:11:45+00:00)
Title: Fix race condition in parrot cache creation.

This fixes a race condition in the creation of the parrot cache directory, by treating mkdir returning EEXIST as a success rather than a failure. This _might_ solve a problem reported by Matthias Wolf re CMS jobs run on multi-slot workers.

@batrick please review