Github user gemmellr commented on the issue:
https://github.com/apache/activemq-artemis/pull/2274
Not sure I'd call it a bug really, more that this is a memory optimisation,
one that shouldnt be getting used much since it only comes into play if you are
encoding things (whereas it should mostly be passing stuff through), in which
case its likely to be expanding the buffer anyway given typical usage.---
