NC Cloud WAS集群报错"ncc100" ncc100是集群中的一台机器名 "exceptionClass":"java.net.UnknownHostException"

{  "data": null,  "error": {    "exceptionClass":"java.net.UnknownHostException",    "message":"ncc100",    "type":null,    "stack":"java.net.UnknownHostException: ncc100\n\tat java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:214)\n\tat java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)\n\tat java.net.Socket.connect(Socket.java:682)\n\tat java.net.Socket.connect(Socket.java:622)\n\tat sun.net.NetworkClient.doConnect(NetworkClient.java:192)\n\tat sun.net.www.http.HttpClient.openServer(HttpClient.java:494)\n\tat sun.net.www.http.HttpClient.openServer(HttpClient.java:589)\n\tat sun.net.www.http.HttpClient.\u003cinit\u003e(HttpClient.java:256)\n\tat sun.net.www.http.HttpClient.New(HttpClient.java:360)\n\tat sun.net.www.http.HttpClient.New(HttpClient.java:378)\n\tat sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1238)\n\tat sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1174)\n\tat sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1068)\n\tat sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1002)\n\tat sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1582)\n\tat sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1510)\n\tat java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:491)\n\tat nc.bs.framework.rmi.HttpRemoteChannel.processIOException(HttpRemoteChannel.java:102)\n\tat nc.bs.framework.rmi.RemoteInvocationHandler.sendRequest(RemoteInvocationHandler.java:249)\n\tat nc.bs.framework.rmi.RemoteInvocationHandler.sendRequest(RemoteInvocationHandler.java:114)\n\tat nc.bs.framework.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:84)\n\tat com.sun.proxy.$Proxy531.getCARegisterCenter(Unknown Source)\n\tat nc.security.NCAuthenticatorToolkit.getCARegisterCenter(NCAuthenticatorToolkit.java:27)\n\tat nccloud.framework.web.container.Request.verifyAllMark(Request.java:497)\n\tat ncc