java - MQTT retries when Exception in messageArrived method -

i have mqtt callback forwards part of data message received via soap endpoint, when soap endpoint faulty messages lost , never arrive @ final consumer.

i'm aware of different qos , delivery tokens, i'm not sure if of me retry sending messages example after triggering exception. can messages "returned" topic later retrying or ensure proper processing of complete message?

on client side i'm using eclipse-paho, via maven:

    <dependency>         <groupid>org.eclipse.paho</groupid>         <artifactid>org.eclipse.paho.client.mqttv3</artifactid>         <version>1.0.1</version>     </dependency> 

from repository: https://repo.eclipse.org/content/repositories/paho-releases

on server side:

debian gnu/linux 8.5 (jessie) mosquitto 1.3.4-2 (mqtt version 3.1/3.1.1 compatible) 

what else should provide?

no, once delivered client message totally gone mqtt system.

it build storage , retry logic mqtt client app handle failures in down stream systems.