Red Hat JBoss AMQ > 7.0 > Using AMQ Broker > 20.7.3. Scaling Clusters
https://access.redhat.com/documentation/en-us/red_hat_jboss_amq/7.0/html-single/using_amq_broker/#scaling_clusters

`scale-down` and `scale-down-group-name` attributes cannot be used on AMQ 7.0.0 . that should be changed to `enabled` and `group-name`.

The current description is the following:
~~~
1.On the broker you want to scale down, set scale-down to true.
If necessary, set scale-down-group-name to the name of the group that contains the broker to which you want the messages to be sent.

2.If cluster brokers are grouped together with different scale-down-group-name values, be careful how you set this parameter. If all of the brokers in a single group are shut down, then the messages from that broker or group will be lost.
~~~

that should be changed to:
~~~
1.On the broker you want to scale down, set *enabled* to true.
If necessary, set *group-name* to the name of the group that contains the broker to which you want the messages to be sent.

2.If cluster brokers are grouped together with different *group-name* values, be careful how you set this parameter. If all of the brokers in a single group are shut down, then the messages from that broker or group will be lost.
~~~