Added debugging information when a session was not found.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@1161 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/messenger/handler/IQRegisterHandler.java

@@ -138,6 +138,18 @@ public class IQRegisterHandler extends IQHandler implements ServerFeaturesProvid
     public IQ handleIQ(IQ packet) throws PacketException, UnauthorizedException {
         ClientSession session = sessionManager.getSession(packet.getFrom());
         IQ reply = null;
+        // If no session was found then answer an error (if possible)
+        if (session == null) {
+            Log.error("Error during registration. Session not found in " +
+                    sessionManager.getPreAuthenticatedKeys() +
+                    " for key " +
+                    packet.getFrom());
+            // This error packet will probably won't make it through
+            reply = IQ.createResultIQ(packet);
+            reply.setChildElement(packet.getChildElement().createCopy());
+            reply.setError(PacketError.Condition.internal_server_error);
+            return reply;
+        }
         // If inband registration is not allowed, return an error.
         if (!enabled) {
             reply = IQ.createResultIQ(packet);