}
EbeanServer server = Ebean.getServer(null);
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(server, 4000, i));
}
System.out.println("main thread sleep ... ");