Github user clebertsuconic commented on the issue:
https://github.com/apache/activemq-artemis/pull/1596
@franz1981 It's just that I changed the meaning of getInitialDelay... -1
meaning unset.. and use the previous semantic... the change you did broke some
usage.. so I had to have a null state for initialDelay where I would get the
previous semantic... that's all---
