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A new broker configuration option will be added to limit the total number of connections that may be active on the broker at any time. This is in addition to the existing max.connections.per.ip config that will continue to limit the number of connections from each host ip address. When the limit is reached, new connections will not be accepted until one or more existing connections are closed. The limit will be a dynamic listener config that can be updated without restarting the broker. The config may be prefixed with listener prefix to specify different limits for different listeners, enabling inter-broker connections to be created even if there are a large number of client connections on  a different listener.

Config option: Name: max.connections Type: Int Default value: Int.MaxValue

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