Solved Not ending task

It was working a couple hours ago, but it just randomly stopped working

After it sends the last message and teleports them to the last place, it will end the task, but it's not

If you could help me out, or steer me the right direction, thanks!

Code:

Bukkit.getScheduler().scheduleSyncRepeatingTask(plugin, new Runnable() {
                int index = 0;
                public void run() {
                    for(Player p : Bukkit.getOnlinePlayers()) {
                        if(plugin.tutorial.contains(p.getName())) {
                            if(index == locations.length) {
                                Bukkit.getScheduler().cancelTask(index);
                                plugin.tutorial.remove(p.getName());
                                for(int i = 0; i < 200; i++) {
                                    p.sendMessage(" ");
                                }
                                p.showPlayer(p);
                                p.sendMessage("§aYou have completed this tutorial! Please go forward to the rules and read those!");
                                p.teleport(locations[index]);
                                for(int i = 0; i < 200; i++) {
                                    p.sendMessage(" ");
                                }
                                for(int i = 0; i < messages[index].length;i++) {
                                    p.sendMessage(messages[index][i]);
                                }
                                index++;
                            }
                        }
                    }
                }
            }, 0, 10*20);
        }
    }
}

 

@Fhbgsdhkfbl
This is because you are canceling an index value, not the task's ID. What you are doing is canceling all the tasks (including those for plugins that are not yours) until this task is canceled. To fix this, replace the index in "cancelTask(index)" with the taskID . You can get the task's id by using "this.getTaskId()"

 

I get an error on this.getTaskId(), I've searched all over on why it happens, but I can't find out why.