We would like to retry message so that it's restored to end of operation's queue. This is in situation where order of messages is not needed to be handled by Ensemble, there is version number in message data and receiving application can ignore incoming message if necessary.
We would try to send message until it's accepted (or manually suspended), but this should not block operation's queue.
We have already this in actions:
D - Disable the Operation, log an error and restore the message to the front of the Operation's queue.