DefaultBackgroundExecutor bg = new DefaultBackgroundExecutor(1, 2, 180, 30, "testDs");
try {
for (int i = 0; i < 12; i++) {
// Thread.sleep(10*i);
bg.execute(new ConnRunner(pool, 4000, i));
}
System.out.println("main thread sleep ... " + pool.getStatus(false));
Thread.sleep(10000);