DB lease lock - broker should stop-start to retry acquiring the lock

Hi Can you help me understand this situation? I've ActiveMQ configured with a lease lock on a DB. Spontaneously it decided it can no longer keep the lock, and starts shutting down: 2019-02-27T16:47:45,491 | INFO  | Starting Thread | BrokerService  | he.activemq.broker.BrokerService 

Re: [Artemis] Moving all messages from one broker cluster to another

Justin's question about AWS replacing nodes and not needing to replicate messages would be applicable if the update strategy being used was rolling update, with the new hosts being launched into the same cluster. But with blue-green, you're making a second cluster, so you have to ensure that