"Unable to establish loopback connection"

nunca vi o erro.. parece que a maquina virtual não está conseguindo criar alguma coisa na rede.. tem como postar a exception inteira?

Olá Alberto, segue o que aparece:

Exception in thread "main" com.sun.xml.internal.ws.server.ServerRtException: Erro de Runtime do Servidor: java.io.IOException: Unable to establish loopback connection
    at com.sun.xml.internal.ws.transport.http.server.ServerMgr.createContext(ServerMgr.java:117)
    at com.sun.xml.internal.ws.transport.http.server.HttpEndpoint.publish(HttpEndpoint.java:64)
    at com.sun.xml.internal.ws.transport.http.server.EndpointImpl.publish(EndpointImpl.java:232)
    at com.sun.xml.internal.ws.spi.ProviderImpl.createAndPublishEndpoint(ProviderImpl.java:126)
    at javax.xml.ws.Endpoint.publish(Endpoint.java:240)
    at br.com.caelum.estoque.ws.PublicaWebService.main(PublicaWebService.java:21)
Caused by: java.io.IOException: Unable to establish loopback connection
    at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
    at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
    at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
    at java.nio.channels.Pipe.open(Pipe.java:155)
    at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
    at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
    at java.nio.channels.Selector.open(Selector.java:227)
    at sun.net.httpserver.ServerImpl.<init>(ServerImpl.java:103)
    at sun.net.httpserver.HttpServerImpl.<init>(HttpServerImpl.java:50)
    at sun.net.httpserver.DefaultHttpServerProvider.createHttpServer(DefaultHttpServerProvider.java:35)
    at com.sun.net.httpserver.HttpServer.create(HttpServer.java:130)
    at com.sun.xml.internal.ws.transport.http.server.ServerMgr.createContext(ServerMgr.java:86)
    ... 5 more
Caused by: java.net.ConnectException: Connection timed out: connect
    at sun.nio.ch.Net.connect0(Native Method)
    at sun.nio.ch.Net.connect(Net.java:454)
    at sun.nio.ch.Net.connect(Net.java:446)
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
    at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
    at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
    at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
    ... 18 more
C:\Users\Leonardo\AppData\Local\NetBeans\Cache\8.1\executor-snippets\run.xml:53: Java returned: 1

A porta 8080 não estava disponível. Curiosamente tentei outras portas, bem como matar os processos que estava usando as portas que tentei, sem sucesso.

Depois, tentei rodar na porta 9876 e funcionou.