It was 1 second for many months, until I increased it to 2 seconds in
HADOOP-1030, a bit over a month ago, so that things would run better on the heavily loaded Solaris box where we run nightly benchmarks.
How often do you see timeouts with
seconds? On what kind of machine?
Related is, how much difference does changing this have on total unit test time? It used to make a big difference, but now that many daemons are stopped with Thread.interrupt() instead of waiting for the timeout interval, total unit test time may not be so sensitive to this parameter. If it's not, then we might even just leave it at the default.