NPE in Central software/update page

I'm getting NPE on refreshing central:

java.lang.NullPointerException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.mylyn.internal.discovery.core.util.P2TransportService.stream(P2TransportService.java:93)
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.eclipse.mylyn.internal.discovery.core.model.RemoteBundleDiscoveryStrategy.performDiscovery(RemoteBundleDiscoveryStrategy.java:107)
at org.eclipse.mylyn.internal.discovery.core.model.ConnectorDiscovery.performDiscovery(ConnectorDiscovery.java:114)
at org.jboss.tools.central.editors.xpl.DiscoveryViewer$18.run(DiscoveryViewer.java:1500)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)