org.eclipse.core.runtime.CoreException: Unknown Host: http://download.jboss.org/jbosstools/discovery/development/4.2.0.Beta2b/jbosstools-directory.xml
	at org.eclipse.equinox.internal.p2.transport.ecf.RepositoryTransport.stream(RepositoryTransport.java:181)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.eclipse.mylyn.internal.discovery.core.util.P2TransportService.stream(P2TransportService.java:92)
	at org.eclipse.mylyn.internal.discovery.core.util.WebUtil.stream(WebUtil.java:161)
	at org.eclipse.mylyn.internal.discovery.core.util.WebUtil.readResource(WebUtil.java:95)
	at org.jboss.tools.project.examples.internal.discovery.xpl.RemoteExternalBundleDiscoveryStrategy.loadRegistry(RemoteExternalBundleDiscoveryStrategy.java:90)
	at org.jboss.tools.project.examples.internal.discovery.xpl.ExternalBundleDiscoveryStrategy.performDiscovery(ExternalBundleDiscoveryStrategy.java:117)
	at org.jboss.tools.project.examples.internal.discovery.ChainedDiscoveryStrategy.performDiscovery(ChainedDiscoveryStrategy.java:62)
	at org.eclipse.mylyn.internal.discovery.core.model.ConnectorDiscovery.performDiscovery(ConnectorDiscovery.java:114)
	at org.jboss.tools.central.editors.xpl.DiscoveryViewer$18.run(DiscoveryViewer.java:1189)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)
Caused by: java.net.UnknownHostException: download.jboss.org
	at java.net.InetAddress.getAllByName0(InetAddress.java:1250)
	at java.net.InetAddress.getAllByName(InetAddress.java:1162)
	at java.net.InetAddress.getAllByName(InetAddress.java:1098)
	at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45)
	at org.apache.http.impl.conn.DefaultClientConnectionOperator.resolveHostname(DefaultClientConnectionOperator.java:278)
	at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:162)
	at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:151)
	at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:125)
	at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:643)
	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
	at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1077)
	at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.access$0(HttpClientRetrieveFileTransfer.java:1068)
	at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer$1.performFileTransfer(HttpClientRetrieveFileTransfer.java:1064)
	at org.eclipse.ecf.filetransfer.FileTransferJob.run(FileTransferJob.java:73)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.IllegalArgumentException: Argument cannot be null)
	at org.eclipse.swt.SWT.error(SWT.java:4441)
	at org.eclipse.swt.SWT.error(SWT.java:4356)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:139)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3781)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3419)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1152)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1033)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:635)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:578)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:379)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:233)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1438)
Caused by: java.lang.IllegalArgumentException: Argument cannot be null
	at org.eclipse.swt.SWT.error(SWT.java:4422)
	at org.eclipse.swt.SWT.error(SWT.java:4356)
	at org.eclipse.swt.SWT.error(SWT.java:4327)
	at org.eclipse.swt.widgets.Widget.error(Widget.java:476)
	at org.eclipse.swt.widgets.Widget.checkParent(Widget.java:350)
	at org.eclipse.swt.widgets.Widget.<init>(Widget.java:235)
	at org.eclipse.swt.widgets.Control.<init>(Control.java:95)
	at org.eclipse.swt.widgets.Scrollable.<init>(Scrollable.java:74)
	at org.eclipse.swt.widgets.Composite.<init>(Composite.java:107)
	at org.jboss.tools.central.editors.xpl.DiscoveryViewer.createDiscoveryContents(DiscoveryViewer.java:725)
	at org.jboss.tools.central.editors.xpl.DiscoveryViewer.createBodyContents(DiscoveryViewer.java:320)
	at org.jboss.tools.central.editors.xpl.DiscoveryViewer.access$10(DiscoveryViewer.java:293)
	at org.jboss.tools.central.editors.xpl.DiscoveryViewer$14.run(DiscoveryViewer.java:842)
	at org.eclipse.ui.internal.UILockListener.doPendingWork(UILockListener.java:167)
	at org.eclipse.ui.internal.UISynchronizer$3.run(UISynchronizer.java:165)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:136)
	... 24 more