连接jmx访问返回9999端口报错，显示连接拒绝，这是什么原因呢？

- [ ] 我已经在 [issues](https://github.com/didi/KnowStreaming/issues) 搜索过相关问题了,并没有重复的。

## 在这里提出你的问题

ERROR 60649 --- [-1-9-thread-109] c.x.k.s.km.common.jmx.JmxConnectorWrap : JMX connect exception, clientLogIdent:clusterPhyId: 10 brokerId: 1 host:wyc.kafka.1.com port:9999.
java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
java.net.ConnectException: Connection refused (Connection refused)
at java.rmi/sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at java.rmi/sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:209)
at java.rmi/sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:196)
at java.rmi/sun.rmi.server.UnicastRef.invoke(UnicastRef.java:129)
at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:209)
at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:161)
at com.sun.proxy.$Proxy241.newClient(Unknown Source)
at java.management.rmi/javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2105)
at java.management.rmi/javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:321)
at java.management/javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:270)
at com.xiaojukeji.know.streaming.km.common.jmx.JmxConnectorWrap.createJmxConnector(JmxConnectorWrap.java:176)
at com.xiaojukeji.know.streaming.km.common.jmx.JmxConnectorWrap.checkJmxConnectionAndInitIfNeed(JmxConnectorWrap.java:74)
at com.xiaojukeji.know.streaming.km.persistence.kafka.KafkaJMXClient.getClientWithCheck(KafkaJMXClient.java:38)