解决金仓数据同步管理平台（KFSMC），节点管理的节点状态一直显示未运行，日志中报错：Caused by: java.rmi.UnknownHostException或Caused by: java.net.UnknownHostException的问题
关键字
KingbaseFlysync ,KFS，KFSMC,金仓数据同步管理平台，Caused by: java.rmi.UnknownHostException，Caused by: java.net.UnknownHostException
问题描述
KFS同步程序状态正常，而金仓数据同步管理平台（KFSMC）的节点管理界面，同步程序运行状态一直显示未运行，日志中有报错：
2023/05/12 14:53:35.440 | 2023-05-12 14:53:35.379 [http-nio-8089-exec-1] ERROR c.k.f.c.s.s.i.StatusCollectionServiceImpl - JMX连接异常：Failed Connection JMX，节点信息： {"description":"6","errorMsgPos":0,"host":"10.10.0.6","id":5,"installDirectory":"-","isAgent":0,"lastUpdate":1683874395350,"licenseExpiredStatus":0,"port":13000,"setupPassword":"","setupStatus":-1,"setupUsername":"-","sshEnabled":0,"sshPort":0,"status":""} 2023/05/12 14:53:35.440 | com.kingbase.flysync.common.jmx.ServerRuntimeException: A component of type 'replicator' at address 10.10.0.6:13000 is not available. 2023/05/12 14:53:35.440 | java.rmi.UnknownHostException: Unknown host: stress06; nested exception is: 2023/05/12 14:53:35.440 | java.net.UnknownHostException: stress06 2023/05/12 14:53:35.440 | Check to be sure that the service is running. 2023/05/12 14:53:35.440 | 2023/05/12 14:53:35.440 | at com.kingbase.flysync.common.jmx.JmxManager.getLocalRMIConnector(JmxManager.java:657) 2023/05/12 14:53:35.440 | at com.kingbase.flysync.replicator.util.ConnectMBean.connect(ConnectMBean.java:104) 2023/05/12 14:53:35.440 | at com.kingbase.flysync.console.system.service.impl.StatusCollectionServiceImpl$StatusCollectionThread.ALLATORIxDEMO(ig:1090) 2023/05/12 14:53:35.440 | at com.kingbase.flysync.console.system.service.impl.StatusCollectionServiceImpl.ALLATORIxDEMO(ig:350) . . . 2023/05/12 14:53:35.443 | Caused by: java.rmi.UnknownHostException: Unknown host: stress06; nested exception is: 2023/05/12 14:53:35.443 | java.net.UnknownHostException: stress06 2023/05/12 14:53:35.443 | at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:616) 2023/05/12 14:53:35.443 | at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216) 2023/05/12 14:53:35.443 | at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202) 2023/05/12 14:53:35.443 | at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:130) 2023/05/12 14:53:35.443 | at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source) 2023/05/12 14:53:35.443 | at javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2430) 2023/05/12 14:53:35.443 | at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:308) 2023/05/12 14:53:35.443 | at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:270) 2023/05/12 14:53:35.443 | at com.kingbase.flysync.common.jmx.JmxManager.getLocalRMIConnector(JmxManager.java:606) 2023/05/12 14:53:35.443 | ... 135 common frames omitted 2023/05/12 14:53:35.443 | Caused by: java.net.UnknownHostException: stress06 2023/05/12 14:53:35.443 | at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184) 2023/05/12 14:53:35.443 | at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) 2023/05/12 14:53:35.443 | at java.net.Socket.connect(Socket.java:589) 2023/05/12 14:53:35.443 | at java.net.Socket.connect(Socket.java:538) 2023/05/12 14:53:35.443 | at java.net.Socket.(Socket.java:434) 2023/05/12 14:53:35.443 | at java.net.Socket.(Socket.java:211) 2023/05/12 14:53:35.444 | at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40) 2023/05/12 14:53:35.444 | at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148) 2023/05/12 14:53:35.444 | at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613) 2023/05/12 14:53:35.444 | ... 143 common frames omitted
问题分析
KFS同步程序的flysync.ini中members参数使用的机器名时，需要使用机器名+端口访问同步程序相应的服务。当KFSMC所在机器的hosts未配置members的机器名时，KFSMC无法访问到同步程序相应服务，导致获取不到同步程序运行状态。
解决方案
1）检查flysync.ini的members参数是否配置的机器名
2）KFSMC所在机器的hosts配置members参数对应的机器名
[root@h3-103 ~]# vim /etc/hosts
在配置文件中添加机器名并保存，示例：
3）登录KFSMC，依次点击“安装部署”-“节点管理”，检查节点状态
