@Alvin, my solution was to merely stop logging so much stuff Luckily for me, there was a significant amount of non-useful DEBUG logging coming from a single class that I simply changed to INFO in my config. Also, I suspect this is related to logging coming from a large number of separate threads concurrently (this was my test case at least), so if there is no way to reduce the amount of logging, perhaps there is some way of reducing the number of concurrent threads.