openfire服务器报错，登录时绑定资源找不到session

错误日志

2014.09.29 17:41:19 org.jivesoftware.openfire.handler.IQBindHandler - Error during resource binding. Session not found in [2cd45a5f, d546b357, 823c9ca1, d3d5c69c, 19ea6814, ae28c8d2, 6bf95251, 22a4c97, 93ea2ce1, 37f01180, f709672e, 178dd63, 45b8e5da, d9285aa4, 14b31887, 41d08eac, b5706f7, 69840aa9, 18f9fce1, 3c4a5c93, 6f1c23b4, 3308e6bc, b348741e, 721bb186, cf28cb1d, bd9260e1, ce6e44ab, ab4f6679, ae060013, 7dfa12c3, 8efa3923, ed9a0d20, 13979012, 5a45a985, 2c70cb91, 46465925, 20d63af0, 26a5864a, 93a9d7f0, 23d48b3e, 540327cd, fb3820b6, f98e6c09, ba785e5d, 16eef3a8, 779a42a3, 45215f00, 1a95af70, baf3b781, 354d6dda, 3f431aa7, 5da71f84, c20cd40b, cf126b9e, 609889b3, fdfdc998, d06fc6a8, 21ca19d3, 8aaa8a24, 2b3cedc3, 3d83aae, 2b94988b, cff54e3c, a0c8b605, 31ba37bf, 4aa48789, 332777a7, 95828b99, 30457f17, 612fb98c, 304b87b4, 7171fefc, ac6512ed, 4483adf2, 372abbc5, 4283ced5, 6af34e16, bb1a4caa, a0210a5, 2d011ba, e24942ad, eb90d304, c11ec56a, 3b972f32, 4906811e, c7e269e8, 43ee07f1, 49842cfc, d5028cd5, eb796ec8, d73b6ee9, 9004b35b, 8bd57a0b, 99d53f2b, 33a989c0, 4917f4a5, fbdda855, b26e95ad, 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95a59f48, 13aefbbf, 431303bd, c591b584, ef403d29, 3920424b, 4e51707a] for key fzl6688@dc01/Smack  

由以上错误日志可以定位到类IQBindHandler，该类有方法handleIQ如下

 @Overridepublic IQ handleIQ(IQ packet) throws UnauthorizedException {        LocalClientSession session = (LocalClientSession) sessionManager.getSession(packet.getFrom());        // If no session was found then answer an error (if possible)        if (session == null) {            Log.error("Error during resource binding. Session not found in " +                    sessionManager.getPreAuthenticatedKeys() +                    " for key " +                    packet.getFrom());            // This error packet will probably won't make it through            IQ reply = IQ.createResultIQ(packet);            reply.setChildElement(packet.getChildElement().createCopy());            reply.setError(PacketError.Condition.internal_server_error);            return reply;        }

有以上代码可知，这是session为null时返回该错误，再来看看session何时为空，切换到代码getSession

public ClientSession getSession(JID from) {        // Return null if the JID is null or belongs to a foreign server. If the server is        // shutting down then serverName will be null so answer null too in this case.        if (from == null || serverName == null || !serverName.equals(from.getDomain())) {            return null;        }        // Initially Check preAuthenticated Sessions        if (from.getResource() != null) {            ClientSession session = localSessionManager.getPreAuthenticatedSessions().get(from.getResource());            if (session != null) {                return session;            }        }        if (from.getResource() == null || from.getNode() == null) {            return null;        }        return routingTable.getClientRoute(from);    }

3种情况：

   1，JID from为空

   2，服务关闭

   3，服务为外部服务

通过对服务器的监控可以分析：客户端用户意外掉线，重新登录需要重新绑定，这时出现的问题

第一种情况从错误日志for key fzl6688@dc01/Smack得知，JID from不为空，且重新登录时用户登录信息还在，估可分析from.getResource() 或

from.getNode() 是否为空

第二种情况需要知道登录请求需要何种服务，查看类SessionManager可知，如果serverName为空则会首先报错Server not initialized，因此

         这种情况 

第三种情况需要知道是否存在其他服务

初步判断错误原因为；在退出时未发送登陆请求