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org.jivesoftware.openfire.user.UserNotFoundException:	at org.jivesoftware.openfire.roster.Roster.getRosterItem(	at org.jivesoftware.openfire.spi.PresenceManagerImpl.canProbePresence(	at org.jivesoftware.openfire.handler.PresenceSubscribeHandler.process(	at org.jivesoftware.openfire.PresenceRouter.handle(	at org.jivesoftware.openfire.PresenceRouter.route(	at org.jivesoftware.openfire.spi.PacketRouterImpl.route(	at	at	at	at	at	at	at