SessionKeeper delay - first onNext respects delay time but after that seems to come in every second or so

gistfile1.txt

keeper.keep(session.id(), 5).subscribe(new Observer<SessionResult>() {

			@Override
			public void onCompleted() {
				// TODO Auto-generated method stub

			}

			@Override
			public void onError(Throwable e) {
				// TODO Auto-generated method stub

			}

			@Override
			public void onNext(SessionResult args) {
				log.warn("Session result = " + args.session().status());

			}

		});
		
		
		2013-11-26 15:52:13,513 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:14,667 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:15,811 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:16,963 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:18,239 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:19,463 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:20,606 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:21,749 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:22,928 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:24,071 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:25,213 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:26,355 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:27,497 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:28,750 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:29,918 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:31,143 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:32,287 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:33,429 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:34,578 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:35,721 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:36,865 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:38,006 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:39,254 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:40,396 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:41,563 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:42,788 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:43,930 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:45,072 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:46,214 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:47,363 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:48,508 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:49,756 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:50,897 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:52,038 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:53,206 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:54,429 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:55,569 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:56,712 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:57,856 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE 
2013-11-26 15:52:58,998 WARN  [Session Keeper] c.b.p.w.s.c.BackendClientTest    onNext@137           Session result = ACTIVE