Program: 158958
Project: 158958
Buggy source:
public synchronized boolean joinTournament(UUID userId,String name,String playerType,int skill,DeckCardLists deckList,String password) throws GameException {
  if (table.getState() != TableState.WAITING) {
    return false;
  }
  Seat seat=table.getNextAvailableSeat(playerType);
  if (seat == null) {
    throw new GameException("String_Node_Str");
  }
  User user=UserManager.getInstance().getUser(userId);
  if (user == null) {
    logger.fatal(new StringBuilder("String_Node_Str").append(name).append("String_Node_Str").append(userId).toString());
    return false;
  }
  if (!table.getTournament().getOptions().getPassword().isEmpty() && playerType.equals("String_Node_Str")) {
    if (!table.getTournament().getOptions().getPassword().equals(password)) {
      user.showUserMessage("String_Node_Str","String_Node_Str");
      return false;
    }
  }
  if (userPlayerMap.containsKey(userId) && playerType.equals("String_Node_Str")) {
    user.showUserMessage("String_Node_Str",new StringBuilder("String_Node_Str").toString());
    return false;
  }
  Deck deck=null;
  if (!table.getTournament().getTournamentType().isLimited()) {
    if (deckList != null) {
      deck=Deck.load(deckList,false,false);
    }
 else {
      user.showUserMessage("String_Node_Str","String_Node_Str");
      return false;
    }
    if (!Main.isTestMode() && !table.getValidator().validate(deck)) {
      StringBuilder sb=new StringBuilder("String_Node_Str").append(name).append("String_Node_Str").append(table.getValidator().getName()).append("String_Node_Str");
      for (      Map.Entry<String,String> entry : table.getValidator().getInvalid().entrySet()) {
        sb.append(entry.getKey()).append("String_Node_Str").append(entry.getValue()).append("String_Node_Str");
      }
      sb.append("String_Node_Str");
      user.showUserMessage("String_Node_Str",sb.toString());
      if (isOwner(userId)) {
        logger.debug("String_Node_Str" + table.getId());
        TableManager.getInstance().removeTable(table.getId());
      }
      return false;
    }
  }
  Player player=createPlayer(name,seat.getPlayerType(),skill);
  if (player != null) {
    if (!player.canJoinTable(table)) {
      user.showUserMessage("String_Node_Str",new StringBuilder("String_Node_Str").append(seat.getPlayerType()).append("String_Node_Str").toString());
      return false;
    }
    tournament.addPlayer(player,seat.getPlayerType());
    TournamentPlayer tournamentPlayer=tournament.getPlayer(player.getId());
    if (deck != null && tournamentPlayer != null) {
      tournamentPlayer.submitDeck(deck);
    }
    table.joinTable(player,seat);
    logger.debug("String_Node_Str" + player.getName() + "String_Node_Str"+ player.getId()+ "String_Node_Str"+ table.getId());
    if (seat.getPlayer().isHuman()) {
      user.addTable(player.getId(),table);
      user.ccJoinedTable(table.getRoomId(),table.getId(),true);
      userPlayerMap.put(userId,player.getId());
    }
    return true;
  }
 else {
    throw new GameException("String_Node_Str" + seat.getPlayerType() + "String_Node_Str");
  }
}

Fixed version (ground truth):
public synchronized boolean joinTournament(UUID userId,String name,String playerType,int skill,DeckCardLists deckList,String password) throws GameException {
  if (table.getState() != TableState.WAITING) {
    return false;
  }
  Seat seat=table.getNextAvailableSeat(playerType);
  if (seat == null) {
    throw new GameException("String_Node_Str");
  }
  User user=UserManager.getInstance().getUser(userId);
  if (user == null) {
    logger.fatal(new StringBuilder("String_Node_Str").append(name).append("String_Node_Str").append(userId).toString());
    return false;
  }
  if (!table.getTournament().getOptions().getPassword().isEmpty() && playerType.equals("String_Node_Str")) {
    if (!table.getTournament().getOptions().getPassword().equals(password)) {
      user.showUserMessage("String_Node_Str","String_Node_Str");
      return false;
    }
  }
  if (userPlayerMap.containsKey(userId) && playerType.equals("String_Node_Str")) {
    user.showUserMessage("String_Node_Str",new StringBuilder("String_Node_Str").toString());
    return false;
  }
  Deck deck=null;
  if (!table.getTournament().getTournamentType().isLimited()) {
    if (deckList != null) {
      deck=Deck.load(deckList,false,false);
    }
 else {
      user.showUserMessage("String_Node_Str","String_Node_Str");
      return false;
    }
    if (!Main.isTestMode() && !table.getValidator().validate(deck)) {
      StringBuilder sb=new StringBuilder("String_Node_Str").append(name).append("String_Node_Str").append(table.getValidator().getName()).append("String_Node_Str");
      for (      Map.Entry<String,String> entry : table.getValidator().getInvalid().entrySet()) {
        sb.append(entry.getKey()).append("String_Node_Str").append(entry.getValue()).append("String_Node_Str");
      }
      sb.append("String_Node_Str");
      user.showUserMessage("String_Node_Str",sb.toString());
      if (isOwner(userId)) {
        logger.debug("String_Node_Str" + table.getId());
        TableManager.getInstance().removeTable(table.getId());
      }
      return false;
    }
  }
  Player player=createPlayer(name,seat.getPlayerType(),skill);
  if (player != null) {
    if (!player.canJoinTable(table)) {
      user.showUserMessage("String_Node_Str",new StringBuilder("String_Node_Str").append(seat.getPlayerType()).append("String_Node_Str").toString());
      return false;
    }
    tournament.addPlayer(player,seat.getPlayerType());
    TournamentPlayer tournamentPlayer=tournament.getPlayer(player.getId());
    if (deck != null && tournamentPlayer != null) {
      tournamentPlayer.submitDeck(deck);
    }
    table.joinTable(player,seat);
    logger.debug("String_Node_Str" + player.getName() + "String_Node_Str"+ player.getId()+ "String_Node_Str"+ table.getId());
    if (seat.getPlayer().isHuman()) {
      seat.getPlayer().setUserData(user.getUserData());
      user.addTable(player.getId(),table);
      user.ccJoinedTable(table.getRoomId(),table.getId(),true);
      userPlayerMap.put(userId,player.getId());
    }
    return true;
  }
 else {
    throw new GameException("String_Node_Str" + seat.getPlayerType() + "String_Node_Str");
  }
}