Thread.sleep(2*THRESHOLD);
Pattern p = Pattern.compile("^(.+)\\/job_(\\d+)\\.(\\d+)_(\\d+)$");
ExpireUnusedJobFiles expire = new ExpireUnusedJobFiles(new Clock(), conf,
new Path(systemDir), p, THRESHOLD);
expire.run();
LOG.info("Check dirs under " + systemDir);
// check if the dirs have been removed
boolean result;
for (int i = 0; i < 10; i++) {