Program: 44796
Project: 44796
Buggy source:
/** 
 * Update player info
 * @param server the server instance
 * @param list a list of jipdbs.bean.PlayerInfo
 * @throws Exception 
 * @since 0.5
 */
public void updatePlayer(Server server,List<PlayerInfo> list) throws Exception {
  log.info("String_Node_Str" + server.getName());
  try {
    for (    PlayerInfo playerInfo : list) {
      try {
        Date playerLastUpdate;
        Player player=playerDAO.findByServerAndGuid(server.getKey(),playerInfo.getGuid());
        if (player == null) {
          player=new Player();
          player.setCreated(new Date());
          player.setGuid(playerInfo.getGuid());
          player.setLevel(playerInfo.getLevel());
          player.setClientId(playerInfo.getClientId());
          player.setServer(server.getKey());
          player.setBanInfo(null);
          player.setBanInfoUpdated(null);
          playerLastUpdate=playerInfo.getUpdated();
        }
 else {
          player.setLevel(playerInfo.getLevel());
          if (player.getClientId() == null) {
            player.setClientId(playerInfo.getClientId());
          }
          playerLastUpdate=player.getUpdated();
        }
        player.setNickname(playerInfo.getName());
        player.setIp(playerInfo.getIp());
        if (playerInfo.getUpdated().after(player.getUpdated())) {
          player.setUpdated(playerInfo.getUpdated());
        }
        handlePlayerEvent(playerInfo,player);
        playerDAO.save(player);
        boolean update=false;
        if (Events.CONNECT.equals(playerInfo.getEvent())) {
          if (server.getUpdated() == null || server.getUpdated().after(playerLastUpdate)) {
            update=true;
          }
        }
        AliasManager.createAlias(player,update);
      }
 catch (      Exception e) {
        log.severe(e.getMessage());
        StringWriter w=new StringWriter();
        e.printStackTrace(new PrintWriter(w));
        log.severe(w.getBuffer().toString());
      }
    }
    server.setDirty(true);
    server.setUpdated(new Date());
    serverDAO.save(server);
  }
 catch (  Exception e) {
    log.severe(e.getMessage());
    StringWriter w=new StringWriter();
    e.printStackTrace(new PrintWriter(w));
    log.severe(w.getBuffer().toString());
    throw e;
  }
}

Fixed version (ground truth):
/** 
 * Update player info
 * @param server the server instance
 * @param list a list of jipdbs.bean.PlayerInfo
 * @throws Exception 
 * @since 0.5
 */
public void updatePlayer(Server server,List<PlayerInfo> list) throws Exception {
  log.info("String_Node_Str" + server.getName());
  try {
    for (    PlayerInfo playerInfo : list) {
      try {
        Date playerLastUpdate;
        Player player=playerDAO.findByServerAndGuid(server.getKey(),playerInfo.getGuid());
        if (player == null) {
          player=new Player();
          player.setCreated(new Date());
          player.setGuid(playerInfo.getGuid());
          player.setLevel(playerInfo.getLevel());
          player.setClientId(playerInfo.getClientId());
          player.setServer(server.getKey());
          player.setBanInfo(null);
          player.setBanInfoUpdated(null);
          playerLastUpdate=playerInfo.getUpdated();
        }
 else {
          player.setLevel(playerInfo.getLevel());
          if (player.getClientId() == null) {
            player.setClientId(playerInfo.getClientId());
          }
          playerLastUpdate=player.getUpdated();
        }
        player.setNickname(playerInfo.getName());
        player.setIp(playerInfo.getIp());
        if (player.getUpdated() == null || playerInfo.getUpdated().after(player.getUpdated())) {
          player.setUpdated(playerInfo.getUpdated());
        }
        handlePlayerEvent(playerInfo,player);
        playerDAO.save(player);
        boolean update=false;
        if (Events.CONNECT.equals(playerInfo.getEvent())) {
          if (server.getUpdated() == null || server.getUpdated().after(playerLastUpdate)) {
            update=true;
          }
        }
        AliasManager.createAlias(player,update);
      }
 catch (      Exception e) {
        log.severe(e.getMessage());
        StringWriter w=new StringWriter();
        e.printStackTrace(new PrintWriter(w));
        log.severe(w.getBuffer().toString());
      }
    }
    server.setDirty(true);
    server.setUpdated(new Date());
    serverDAO.save(server);
  }
 catch (  Exception e) {
    log.severe(e.getMessage());
    StringWriter w=new StringWriter();
    e.printStackTrace(new PrintWriter(w));
    log.severe(w.getBuffer().toString());
    throw e;
  }
}