ActiveMQ5.11.1集群，后台刷.InstanceAlreadyExistsException警告

[第二空间技术实验室]

ActiveMQ5.11.1集群，broker2启动后，后台不停的刷警告，但是功能正常

2015-06-23 15:02:58,962 | WARN  | Failed to register queue://xhGeek.censor-request-A | org.apache.activemq.network.MBeanBridgeDestination | ActiveMQ Transport: tcp:///192.168.83.168:59001@61616 
javax.management.InstanceAlreadyExistsException: org.apache.activemq:brokerName=broker16701167master,connector=duplexNetworkConnectors,networkConnectorName=#50,networkBridge=tcp_//192.168.83.168_59001,type=Broker,direction=inbound,destinationType=Queue,destinationName=xhGeek.censor-request-A 
    at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)[:1.7.0_45] 
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)[:1.7.0_45] 
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)[:1.7.0_45] 
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)[:1.7.0_45] 
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)[:1.7.0_45] 
    at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)[:1.7.0_45] 
    at org.apache.activemq.broker.jmx.ManagementContext.registerMBean(ManagementContext.java:380)[activemq-broker-5.11.1.jar:5.11.1] 
    at org.apache.activemq.broker.jmx.AnnotatedMBean.registerMBean(AnnotatedMBean.java:72)[activemq-broker-5.11.1.jar:5.11.1] 
    at org.apache.activemq.network.MBeanBridgeDestination.onInboundMessage(MBeanBridgeDestination.java:97)[activemq-broker-5.11.1.jar:5.11.1] 
    at org.apache.activemq.network.MBeanNetworkListener.onInboundMessage(MBeanNetworkListener.java:115)[activemq-broker-5.11.1.jar:5.11.1] 
    at org.apache.activemq.network.DemandForwardingBridgeSupport.serviceInboundMessage(DemandForwardingBridgeSupport.java:1680)[activemq-broker-5.11.1.jar:5.11.1] 
    at org.apache.activemq.network.DemandForwardingBridgeSupport.serviceRemoteCommand(DemandForwardingBridgeSupport.java:649)[activemq-broker-5.11.1.jar:5.11.1] 
    at org.apache.activemq.network.DemandForwardingBridgeSupport$3.onCommand(DemandForwardingBridgeSupport.java:224)[activemq-broker-5.11.1.jar:5.11.1] 
    at org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:116)[activemq-client-5.11.1.jar:5.11.1] 
    at org.apache.activemq.transport.MutexTransport.onCommand(MutexTransport.java:50)[activemq-client-5.11.1.jar:5.11.1] 
    at org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:113)[activemq-client-5.11.1.jar:5.11.1] 
    at org.apache.activemq.transport.AbstractInactivityMonitor.onCommand(AbstractInactivityMonitor.java:270)[activemq-client-5.11.1.jar:5.11.1] 
    at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)[activemq-client-5.11.1.jar:5.11.1] 
    at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:214)[activemq-client-5.11.1.jar:5.11.1] 
    at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:196)[activemq-client-5.11.1.jar:5.11.1] 
    at java.lang.Thread.run(Thread.java:744)[:1.7.0_45] 

我的networkConnectors配置如下：
<networkConnectors>
<networkConnector name="linkToCluster1" uri="masterslave:(tcp://192.168.83.167:61616,tcp://192.168.83.168:61617)?maximumConnections=1000&wireFormat.maxFrameSize=104857600" userName="admin" password="xinh" duplex="true" />
</networkConnectors>

是什么问题？求教怎么解决啊？

谢谢！