Be aware that the BrokerAdminClient.setClusterGatewayPause method halts the flow of traffic in one direction. That is, it stops the Broker to which the BrokerAdminClient client is connected from sending outbound messages to a specified cluster. It does not halt the flow of inbound traffic to the gateway Broker from the remote cluster. To halt both inbound and outbound between two gateway Brokers, you must execute BrokerAdminClient.setClusterGatewayPause on both Brokers.

Note that once you pause the forwarding queue for a cluster, it remains paused even if the gateway Broker is restarted or the Broker Admin client disconnects.