Changes to connect messages, added some debug messages to narrow down server user handling bug.

Mage.Common/src/mage/remote/SessionImpl.java

@@ -216,7 +216,9 @@ public class SessionImpl implements Session {
                 UserDataView userDataView = new UserDataView(connection.getAvatarId(), connection.isShowAbilityPickerForced());
                 // for backward compatibility. don't remove twice call - first one does nothing but for version checking
                 registerResult = server.registerClient(connection.getUsername(), sessionId, client.getVersion());
-                server.setUserData(connection.getUsername(), sessionId, userDataView);
+                if (registerResult) {
+                    server.setUserData(connection.getUsername(), sessionId, userDataView);
+                }
             } else {
                 registerResult = server.registerAdmin(connection.getPassword(), sessionId, client.getVersion());
             }
@@ -229,7 +231,7 @@ public class SessionImpl implements Session {
                 return true;
             }
             disconnect(false);
-            client.showMessage("Unable to connect to server.");
+            // client.showMessage("Unable to connect to server.");
         } catch (MalformedURLException ex) {
             logger.fatal("", ex);
             client.showMessage("Unable to connect to server. "  + ex.getMessage());

Mage.Server/src/main/java/mage/server/MageServerImpl.java

@@ -109,9 +109,9 @@ public class MageServerImpl implements MageServer {
                 LogServiceImpl.instance.log(LogKeys.KEY_WRONG_VERSION, userName, version.toString(), Main.getVersion().toString(), sessionId);
                 throw new MageVersionException(version, Main.getVersion());
             }
-            logger.info(new StringBuilder("RegisterClient - userName: ").append(userName).append(" sessionId = ").append(sessionId));
+            logger.debug(new StringBuilder("RegisterClient - userName: ").append(userName).append(" sessionId = ").append(sessionId));
             return SessionManager.getInstance().registerUser(sessionId, userName);
-        } catch (Exception ex) {
+        } catch (MageException ex) {
             if (ex instanceof MageVersionException) {
                 throw (MageVersionException)ex;
             }
@@ -901,7 +901,7 @@ public class MageServerImpl implements MageServer {
         return executeWithResult("getUsers", sessionId, new ActionWithNullNegativeResult<List<UserView>>() {
             @Override
             public List<UserView> execute() throws MageException {
-                List<UserView> users = new ArrayList<UserView>();
+                List<UserView> users = new ArrayList<>();
                 for (User user : UserManager.getInstance().getUsers()) {
                     users.add(new UserView(user.getName(), "", user.getSessionId(), user.getConnectionTime()));
                 }
@@ -1037,7 +1037,7 @@ public class MageServerImpl implements MageServer {
 
     @Override
     public List<ExpansionInfo> getMissingExpansionData(List<String> codes) {
-        List<ExpansionInfo> result = new ArrayList<ExpansionInfo>();
+        List<ExpansionInfo> result = new ArrayList<>();
         for (ExpansionInfo expansionInfo : ExpansionRepository.instance.getAll()) {
             if (!codes.contains(expansionInfo.getCode())) {
                 result .add(expansionInfo);

Mage.Server/src/main/java/mage/server/Session.java

@@ -28,7 +28,10 @@
 
 package mage.server;
 
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
 import java.util.UUID;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -37,7 +40,6 @@ import mage.interfaces.callback.ClientCallback;
 import mage.players.net.UserData;
 import mage.players.net.UserGroup;
 import mage.server.util.ConfigSettings;
-import mage.view.ChatMessage;
 import mage.view.UserDataView;
 import org.apache.log4j.Logger;
 import org.jboss.remoting.callback.AsynchInvokerCallbackHandler;
@@ -68,21 +70,29 @@ public class Session {
         this.timeConnected = new Date();
     }
 
-    public void registerUser(String userName) throws MageException {
+    public String registerUser(String userName) throws MageException {
+        String returnMessage = registerUserHandling(userName);
+        if (returnMessage != null) {
+            sendErrorMessageToClient(returnMessage);
+        }
+        return returnMessage;
+    }
+
+    public String registerUserHandling(String userName) throws MageException {
         this.isAdmin = false;
         if (userName.equals("Admin")) {
-            throw new MageException("User name already in use");
+            return "User name Admin already in use";
         }
         if (userName.length() > ConfigSettings.getInstance().getMaxUserNameLength()) {
-            throw new MageException(new StringBuilder("User name may not be longer than ").append(ConfigSettings.getInstance().getMaxUserNameLength()).append(" characters").toString());
+            return new StringBuilder("User name may not be longer than ").append(ConfigSettings.getInstance().getMaxUserNameLength()).append(" characters").toString();
         }
         if (userName.length() < ConfigSettings.getInstance().getMinUserNameLength()) {
-            throw new MageException(new StringBuilder("User name may not be shorter than ").append(ConfigSettings.getInstance().getMinUserNameLength()).append(" characters").toString());
+            return new StringBuilder("User name may not be shorter than ").append(ConfigSettings.getInstance().getMinUserNameLength()).append(" characters").toString();
         }
         Pattern p = Pattern.compile(ConfigSettings.getInstance().getUserNamePattern(), Pattern.CASE_INSENSITIVE);
         Matcher m = p.matcher(userName);
         if (m.find()) {
-           throw new MageException("User name '" + userName + "' includes not allowed characters: use a-z, A-Z and 0-9");
+            return new StringBuilder("User name '").append(userName).append("' includes not allowed characters: use a-z, A-Z and 0-9").toString();
         }
         User user = UserManager.getInstance().createUser(userName, host);
         if (user == null) {  // user already exists
@@ -93,20 +103,20 @@ public class Session {
                     // ChatManager.getInstance().broadcast([CHAT ID TABLES], "has reconnected", ChatMessage.MessageColor.GREEN);
                     logger.info("Reconnecting session for " + userName);
                 } else {
-                    //throw new MageException("This machine is already connected");
+                        //throw new MageException("This machine is already connected");
                     //disconnect previous one
                     logger.info("Disconnecting another user instance: " + userName);
                     UserManager.getInstance().disconnect(user.getId(), User.DisconnectReason.ConnectingOtherInstance);
                 }
-            }
+            } else {
-            else {
+                return new StringBuilder("User name ").append(userName).append(" already in use (or your IP address changed)").toString();
-                throw new MageException("User name " + userName + " already in use");
             }
         }
         if (!UserManager.getInstance().connectToSession(sessionId, user.getId())) {
-            throw new MageException("Error connecting " + userName);
+            return new StringBuilder("Error connecting ").append(userName).toString();
         }
         this.userId = user.getId();
+        return null;
     }
 
     public void registerAdmin() {
@@ -232,4 +242,11 @@ public class Session {
     void setHost(String hostAddress) {
         this.host = hostAddress;
     }
+
+    void sendErrorMessageToClient(String message) {
+        List<String> messageData = new LinkedList<>();
+        messageData.add("Error while connecting to server");
+        messageData.add(message);
+        fireCallback(new ClientCallback("showUserMessage", null, messageData));
+    }
 }

Mage.Server/src/main/java/mage/server/SessionManager.java

@@ -66,13 +66,17 @@ public class SessionManager {
     public boolean registerUser(String sessionId, String userName) throws MageException {
         Session session = sessions.get(sessionId);
         if (session != null) {
-            session.registerUser(userName);
+            String returnMessage =  session.registerUser(userName);
+            if (returnMessage == null) {
             LogServiceImpl.instance.log(LogKeys.KEY_USER_CONNECTED, userName, session.getHost(), sessionId);
             logger.info(new StringBuilder("User: ").append(userName)
                     .append(" userId: ").append(session.getUserId())
                     .append(" connected from: ").append(session.getHost())
                     .append(" sessionId: ").append(sessionId));
             return true;
+            } else {
+                logger.info(new StringBuilder("User not registered - ").append(returnMessage));
+            }
         }
         return false;
     }

Mage.Server/src/main/java/mage/server/TableManager.java

@@ -209,9 +209,11 @@ public class TableManager {
     public void leaveTable(UUID userId, UUID tableId) {
         if (controllers.containsKey(tableId)) {
             // table not started yet and user is the owner, remove the table
-            if (isTableOwner(tableId, userId)
+            Table table = getTable(tableId);
-                    && (getTable(tableId).getState().equals(TableState.WAITING)
+            if (table != null
-                    || getTable(tableId).getState().equals(TableState.STARTING))) {
+                    && isTableOwner(tableId, userId)
+                    && (table.getState().equals(TableState.WAITING)
+                    || table.getState().equals(TableState.STARTING))) {
                 removeTable(tableId);
 
             } else {

Mage.Server/src/main/java/mage/server/User.java

@@ -317,18 +317,23 @@ public class User {
     }
 
     public void kill(DisconnectReason reason) {
-        for (GameSession session: gameSessions.values()) {
+        logger.debug("kill: kill game sessions");
-            session.kill();
+        for (GameSession gameSession: gameSessions.values()) {
+            gameSession.kill();
         }
-        for (DraftSession session: draftSessions.values()) {
+        logger.debug("kill: kill draft sessions");
-            session.setKilled();
+        for (DraftSession draftSession: draftSessions.values()) {
+            draftSession.setKilled();
         }
-        for (TournamentSession session: tournamentSessions.values()) {
+        logger.debug("kill: kill tournament sessions");
-            session.setKilled();
+        for (TournamentSession tournamentSession: tournamentSessions.values()) {
+            tournamentSession.setKilled();
         }
+        logger.debug("kill: leave tables");
         for (Entry<UUID, Table> entry: tables.entrySet()) {
             TableManager.getInstance().leaveTable(userId, entry.getValue().getId());
         }
+        logger.debug("kill: remove user from chat");
         ChatManager.getInstance().removeUser(userId, reason);
     }
 

Mage.Server/src/main/java/mage/server/game/GameSession.java

@@ -233,7 +233,7 @@ public class GameSession extends GameWatcher {
         gameView.setHand(new SimpleCardsView(player.getHand().getCards(game)));
 
         if (player.getPlayersUnderYourControl().size() > 0) {
-            Map<String, SimpleCardsView> handCards = new HashMap<String, SimpleCardsView>();
+            Map<String, SimpleCardsView> handCards = new HashMap<>();
             for (UUID controlledPlayerId : player.getPlayersUnderYourControl()) {
                 Player opponent = game.getPlayer(controlledPlayerId);
                 handCards.put(opponent.getName(), new SimpleCardsView(opponent.getHand().getCards(game)));
@@ -243,7 +243,7 @@ public class GameSession extends GameWatcher {
 
         //TODO: should player who controls another player's turn be able to look at all these cards?
 
-        List<LookedAtView> list = new ArrayList<LookedAtView>();
+        List<LookedAtView> list = new ArrayList<>();
         for (Entry<String, Cards> entry : game.getState().getLookedAt(playerId).entrySet()) {
             list.add(new LookedAtView(entry.getKey(), entry.getValue(), game));
         }
@@ -265,7 +265,9 @@ public class GameSession extends GameWatcher {
     }
 
     public void kill() {
-        game.quit(playerId);
+        if (game != null) {
+            game.quit(playerId);
+        }
     }
 
     public void setUserData(UserData userData) {

Mage/src/mage/cards/repository/CardRepository.java

@@ -55,7 +55,7 @@ public enum CardRepository {
 
     private static final String JDBC_URL = "jdbc:sqlite:db/cards.db";
     private static final String VERSION_ENTITY_NAME = "card";
-    private static final long CARD_DB_VERSION = 23;
+    private static final long CARD_DB_VERSION = 24;
 
     private final Random random = new Random();
     private Dao<CardInfo, Object> cardDao;