code: private void cleanup(JobID jobId) {
  		if (!lru.contains(jobId)) {
  			lru.addFirst(jobId);
  		}
  		if (lru.size() > this.maxEntries) {
  			JobID toRemove = lru.removeLast();
  			this.jobAccumulators.remove(toRemove);
  		}
  	}
docs: Cleanup data for the oldest jobs if the maximum number of entries is
  reached.