My aim is to retrieve the messages that are published when the subscriber is not connected to the server. I have tried with Mosquitto broker and paho client , I have received all the missed out messages there was no problem. But when I used apache apollo in place of mosquitto broker then I am not able to receive the missed out messages. But when I restart the broker(apache apollo) those message are been published. Is it the fault of the broker or any configuration changes that I need to make specific for apache apollo.