Repeat the trigger delete event

[jqncc]

subscribe DataChanges event

...
client.writeDate(watchNode, "newcontxpccc");
       // try {
        //    TimeUnit.MILLISECONDS.sleep(100L);
       // } catch (InterruptedException e1) {
     //e1.printStackTrace();
     //   }
client.delete(watchNode, false);
...

The above code, i expect trigger DataChange event,and then to trigger dataDeleted event.
but the truth is that DataChange even tmissing,and DataDeleted repeat trigger.