We restarted our Database server MSSQL 2005 a couple of time over the weekend for a Network Driver update, and have problems reported by openfire xmpp servers.
On the Openfire Server which is Windows 2008R2 STD edition x64 i do a netstat i can see multiple session on the Port, but the Sessions tab under Openfire reports 0 Client Connections.
Error log
Exception in thread "Thread-3" java.lang.NullPointerException
at org.jivesoftware.openfire.pep.IQPEPHandler.stopExecutor(IQPEPHandler.java:251)
at org.jivesoftware.openfire.pep.IQPEPHandler.stop(IQPEPHandler.java:211)
at org.jivesoftware.openfire.XMPPServer.shutdownServer(XMPPServer.java:948)
at org.jivesoftware.openfire.XMPPServer.access$700(XMPPServer.java:146)
at org.jivesoftware.openfire.XMPPServer$ShutdownHookThread.run(XMPPServer.java:898 )