NikitaShupletsov

Initially the idea was to call it oldestMessageAge or ageOfOldestMessage, but then I came across the artemis metric and decided to use the same name for the sake of consistency....

> What will be the behavior when the replication queue is full and the replica broker is unreachable? Have you considered this case? Sorry for the late reply. We've come...

> This is a big feature I would have expected some discussion on mailing lists around it and it's design. Maybe I missed it? I tried to initiate a discussion...

>A bit missing I'm struggling with how the acks back from a mirror is working reliably here where clients can be connect to either. I'm assuming you're trying to mimick...

>I haven't gone through much of this yet but the number 1 thing is anything here needs to be isolated and as Matt pointed out I have some concerns with...

due to the concerns regarding the internal changes, I extracted them to a separate PR: https://github.com/apache/activemq/pull/953 so that it's easier to review. the description contains the explanation what and why...

>I also wonder whether or not this should be part of the core broker. At this point I'm not really convinced this should be included and may be better as...