long startTime = System.currentTimeMillis();
TaskRunner runner = new TaskRunner(NUM_THREADS);
log.warn("Starting warmup");
// creates all the Fqns since this can be expensive and we don't really want to measure this (for now)
for (final Fqn fqn : fqns) {
runner.execute(new Runnable() {
public void run() {
try {
// this will create the necessary nodes.
cache.put(fqn, "key", Collections.emptyMap());
}