java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThread)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
        at java.security.AccessController.checkPermission(AccessController.java:427)
        at java.util.concurrent.ThreadPoolExecutor.shutdown(ThreadPoolExecutor.java:894)
        at java.util.concurrent.Executors$DelegatedExecutorService.shutdown(Executors.java:594)
        at org.jivesoftware.smack.PacketReader.shutdown(PacketReader.java:191)
        at org.jivesoftware.smack.XMPPConnection.shutdown(XMPPConnection.java:634)
        at org.jivesoftware.smack.XMPPConnection.disconnect(XMPPConnection.java:707)
        at org.jivesoftware.smack.XMPPConnection.disconnect(XMPPConnection.java:682)
        at org.netbeans.modules.kenai.api.Kenai.xmppDisconnect(Kenai.java:588)
        at org.netbeans.modules.kenai.api.Kenai.login(Kenai.java:197)
        at org.netbeans.modules.kenai.collab.chat.PresenceIndicator$MouseL$1$1.run(PresenceIndicator.java:162)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:602)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1070)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThread)