Bug 241805

Stackrace:
java.net.ConnectException: Connection refused: no further information
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
	at org.xnio.nio.WorkerThread$ConnectHandle.handleReady(WorkerThread.java:318)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:531)
	at ...asynchronous invocation...(Unknown Source)
	at org.jboss.remoting3.EndpointImpl.doConnect(EndpointImpl.java:272)
	at org.jboss.remoting3.EndpointImpl.doConnect(EndpointImpl.java:253)
	at org.jboss.remoting3.EndpointImpl.connect(EndpointImpl.java:351)
	at org.jboss.remoting3.EndpointImpl.connect(EndpointImpl.java:339)
	at org.jboss.as.protocol.ProtocolConnectionUtils.connect(ProtocolConnectionUtils.java:79)
	at org.jboss.as.protocol.ProtocolConnectionUtils.connectSync(ProtocolConnectionUtils.java:110)
Caused: java.net.ConnectException: JBAS012174: Could not connect to remote://localhost:9999. The connection failed
	at org.jboss.as.protocol.ProtocolConnectionUtils.connectSync(ProtocolConnectionUtils.java:118)
	at org.jboss.as.protocol.ProtocolConnectionManager$EstablishingConnection.connect(ProtocolConnectionManager.java:256)
	at org.jboss.as.protocol.ProtocolConnectionManager.connect(ProtocolConnectionManager.java:70)
	at org.jboss.as.protocol.mgmt.FutureManagementChannel$Establishing.getChannel(FutureManagementChannel.java:204)
	at org.jboss.as.controller.client.impl.RemotingModelControllerClient.getOrCreateChannel(RemotingModelControllerClient.java:148)
	at org.jboss.as.controller.client.impl.RemotingModelControllerClient$1.getChannel(RemotingModelControllerClient.java:67)
	at org.jboss.as.protocol.mgmt.ManagementChannelHandler.executeRequest(ManagementChannelHandler.java:117)
	at org.jboss.as.protocol.mgmt.ManagementChannelHandler.executeRequest(ManagementChannelHandler.java:92)
	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.executeRequest(AbstractModelControllerClient.java:236)
	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.execute(AbstractModelControllerClient.java:141)
	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.executeForResult(AbstractModelControllerClient.java:127)
Caused: java.io.IOException
	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.executeForResult(AbstractModelControllerClient.java:129)
	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.execute(AbstractModelControllerClient.java:71)
Caused: java.lang.reflect.InvocationTargetException
	at sun.reflect.GeneratedMethodAccessor65.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.netbeans.modules.javaee.wildfly.ide.commands.WildflyClient.executeOnModelNode(WildflyClient.java:206)
	at org.netbeans.modules.javaee.wildfly.ide.commands.WildflyClient.undeploy(WildflyClient.java:462)
Caused: java.io.IOException
	at org.netbeans.modules.javaee.wildfly.ide.commands.WildflyClient.undeploy(WildflyClient.java:468)
	at org.netbeans.modules.javaee.wildfly.ide.commands.WildflyClient.deploy(WildflyClient.java:480)
[catch] at org.netbeans.modules.javaee.wildfly.WildFlyDeploymentManager.distribute(WildFlyDeploymentManager.java:178)
	at org.netbeans.modules.j2ee.deployment.impl.TargetServer.deploy(TargetServer.java:686)
	at org.netbeans.modules.j2ee.deployment.devmodules.api.Deployment.deploy(Deployment.java:246)
	at org.netbeans.modules.maven.j2ee.execution.DeploymentHelper.perform(DeploymentHelper.java:266)
	at org.netbeans.modules.maven.j2ee.execution.CoSAlternativeExecutorImpl.execute(CoSAlternativeExecutorImpl.java:87)
	at org.netbeans.modules.maven.cos.CoSAlternativeExecutor.execute(CoSAlternativeExecutor.java:87)
	at org.netbeans.modules.maven.cos.CosChecker.checkRunMainClass(CosChecker.java:207)
	at org.netbeans.modules.maven.cos.CosChecker.checkRunConfig(CosChecker.java:161)
	at org.netbeans.modules.maven.execute.MavenCommandLineExecutor.run(MavenCommandLineExecutor.java:159)
	at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153)

Fix by updating standalone.xml in WildFly 8 Final:

<socket-binding-group ...>
   <socket-binding name="management-native" interface="management" port="${jboss.management.native.port:9999}"/>
</socket-binding-group>

<management-interfaces>
...
            <native-interface security-realm="ManagementRealm">
                <socket-binding native="management-native"/>
            </native-interface>
</management-interfaces>

This has been fixed in the 1.6 version of the plugin which is not the version you are using (I assume you are using the version packaged with the beta).

You are right, it is version 1.0.4. 
How can I update? I tried to update in Netbeans and there is no update available.

I used the following additional update center:
http://deadlock.netbeans.org/job/nbms-and-javadoc/lastStableBuild/artifact/nbbuild/nbms/updates.xml.gz, seems to work

This problem with the wildfly plugin still exists in version 1.0.17 which is the latest download in the plugin centre and version 8.1.0.Final of wildfly.

After further research: Jboss have removed the native management interface on port 9999. http://wildfly.org/news/2014/02/11/WildFly8-Final-Released/ "Note that since CR1 we have finally dropped the native management port 9999, which instead uses the HTTP management port (9990)." Posted by Jason Greene on Feb 11, 2014.

I tried to use the update centre listed by jomu however this fails during the download report a network error downloading http://deadlock.netbeans.org/job/nbms-and-javadoc/lastStableBuild/artifact/nbbuild/nbms/ide/org-netbeans-modules-css-editor.nbm. Do not know why this is being downloaded because on the update for WildFly Application Server is ticked.

The plugin will always use port 9990 for communicating with the server.
If you are using a version prior to 8.0 or if you change this port then it will not work.
This is not a bug you might want to create an enhancement request to make this port configurable in the plugin.