boolean saverTerminated = saver.awaitTermination(500, TimeUnit.MILLISECONDS);
System.err.println("executorTerminated=" + executorTerminated + ", saverTerminated=" + saverTerminated);
boolean saverTerminated = saver.awaitTermination(500, TimeUnit.MILLISECONDS);
System.err.println("executorTerminated=" + executorTerminated + ", saverTerminated=" + saverTerminated);