ExceededMaximumConnections ERROR using maxConnections with NIO transport on Fuse Message Broker7.0

Issue

We are using Fuse Messsage Broker in standalone mode. We've configured maxConnections on a trasnport connector using NIO transport:

What can we do to avoid this error:

2014-07-08 22:16:11,399 [onnections=1600] ERROR TransportConnector             - Could not accept connection : org.apache.activemq.transport.tcp.ExceededMaximumConnectionsException: Exceeded the max
imum number of allowed client connections. See the 'maximumConnections' property on the TCP transport configuration URI in the ActiveMQ configuration file (e.g., activemq.xml)
2014-07-08 22:16:12,943 [onnections=1600] ERROR TransportConnector             - Could not accept connection : org.apache.activemq.transport.tcp.ExceededMaximumConnectionsException: Exceeded the max
imum number of allowed client connections. See the 'maximumConnections' property on the TCP transport configuration URI in the ActiveMQ configuration file (e.g., activemq.xml)
2014-07-08 22:16:16,521 [onnections=1600] ERROR TransportConnector             - Could not accept connection : org.apache.activemq.transport.tcp.ExceededMaximumConnectionsException: Exceeded the max
imum number of allowed client connections. See the 'maximumConnections' property on the TCP transport configuration URI in the ActiveMQ configuration file (e.g., activemq.xml)