erreur scheduler

public class Main extends JavaPlugin implements CommandExecutor, Listener{

	public static Main i;
	private String mdp;
	private String mdpconfirm;

	@Override
	public void onEnable() {
		i = this;
		mdpSql sql = new mdpSql("jdbc:mysql://", "213.32.103.252", "wng_clashofcraft", "cocv1", "dydu5y3y9", "coc_oldplayer");
		sql.connection();
		Bukkit.getPluginManager().registerEvents(this, this);
		super.onEnable();
	}

	@SuppressWarnings("deprecation")
	@EventHandler(priority = EventPriority.HIGHEST)
	public void onJoin(PlayerJoinEvent e){
		Player p = e.getPlayer();
		int temps = 60;
		p.addPotionEffect(new PotionEffect(PotionEffectType.SLOW, 9999, 10));
		final int tache = Bukkit.getServer().getScheduler().scheduleAsyncRepeatingTask(this, new Runnable() {

			@Override
			public void run() {
				if (temps == 0){
					p.kickPlayer("vous n'avez pas taper la commande voulue");
					Bukkit.getServer().getScheduler().cancelTask(tache);
				}
				if (temps == 30 || temps == 15 || temps == 10 || temps <=9){
					p.sendMessage("Il vous reste "+temps+" secondes pour effectuer la commande /mdp <mdp authme> <mdp authme>");
				}
			}
		}, 20L, 20L);
	}

	@Override
	public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
		if (sender instanceof Player)return false;
		if (label.equalsIgnoreCase("mdp")){
			if (args.length < 2)return false;
			Player p = (Player) sender;
			this.mdp = args[0].toString();
			this.mdpconfirm = args[1].toString();
			if (mdp == mdpconfirm){
				mdpSql.savePassword(p, mdp);
			} else{
				p.sendMessage("&eKEVIN EST UN CONNARD");
			}
		}
		return true;
	}

	public String getMdp(){
		return mdp;
	}

	public String getMdpConfirm(){
		return mdpconfirm;
	}

}