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java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.hash( at java.util.concurrent.ConcurrentHashMap.get( at org.jitsi.jicofo.auth.AbstractAuthAuthority.getSession( at org.jitsi.jicofo.auth.XMPPDomainAuthAuthority.processAuthLocked( at org.jitsi.jicofo.auth.AbstractAuthAuthority.processAuthentication( at org.jitsi.jicofo.xmpp.FocusComponent.processExtensions( at org.jitsi.jicofo.xmpp.FocusComponent.handleConferenceIq( at org.jitsi.jicofo.xmpp.FocusComponent.handleIQSet( at org.xmpp.component.AbstractComponent.processIQRequest( at org.xmpp.component.AbstractComponent.processIQ( at org.xmpp.component.AbstractComponent.processQueuedPacket( at org.xmpp.component.AbstractComponent.access$100( at org.xmpp.component.AbstractComponent$ at java.util.concurrent.ThreadPoolExecutor.runWorker( at java.util.concurrent.ThreadPoolExecutor$ at