Bukkit

@LordKainzo

These are most likely to trigger:

Also usually the yawrate checking could prevent other stuff, unfortunately it can not be completely disabled for fighting currently (subject to change) - it will not prevent fighting if FIGHT_ANGLE is not checked, but it might prevent some things after the skill use / exemption or once FIGHT_ANGLE is checked again.

These might rather not trigger:

(Knockback or critical might under rare circumstances.)

I guess i will completely bind the yawrate "feeding" to the angle check, so if a player is exempted from that yawrate can not deal any further penalties. Angle and yawrate are like relatives anyway (fast turning).

Just for reference: Build 215 binds yawrate(fight) completely to angle being enabled (includes exemption check), though that builds contains a good bit of other dev changes too.

@Jamesst20

I doubt that has to do with NCP, actually. Feel free to open a ticket and please specify some more information as requested there (full versions of CB, NCP, possibly pm a plugin list).

Check for other plugins like Orebfuscator ProtocolLib DisguiseCraft and finally mind Minecraft, if you regard the change list for the pre-release for MC 1.4.3, there is some suspicious entries about the void (at least one).

But it could be indirectly related to NCP, however we can't possible judge without more information.

@LordKainzo

Oh, thank you very much for the timings!

I think that is not a problem, actually the timings for player move are pretty good. Could be interesting to compare to other plugins like WorldGuard, or to timings from an old version.

I would be surprised if you had constant lag by NCP because the timings hardly show any candidates.But they also can't really reveal peaks and memory related problems (all/other spots getting slower due to memory problems, like crashes :p ). That NCP uses more than other plugins is just natural, the moving checks alone take a good bit of time, because they add up given that they are the most frequent event. In addition NCP listens to a lot of events and does checks on them (permissions, violations, logging), so that the total time may be higher than that of any other plugin.

@craftovski

The contention setting is only for the fastbreak check.

The delay setting should be directly shown in the fastbreak section, increase it by 50 for instance.

Which version of NCP exactly are you running ?

@MineCraftMyph

Not sure where "it says" that, but you probably want to have a look at the plugin CompatNoCheatPlus, which can make mcMMO and NCP compatible.

@craftovski

Don't set contention lower than default (2000), for small lag spikes you should increase it.

6000 means that the players can mine like 6 seconds faster within 2 minutes. So they can gain six seconds while mining over two minutes which allows to break a couple of grass block instantly but not many. That might already do it if you have low vls normally (VL 1 is like 1 second too fast time accumulated...).

Another thing is if the server ticks are a bit irregular, you might in addition increase the delay setting by say 50 (in ms, i.e. one server ticks normal duration), allowing to mine each block 50 ms faster than default (should be something >100 the delay then). That could help against accumulating the very small amounts over two minutes for fast breakable blocks.

Another point is: Are the users really trusted and does it happen to many / random users? Don't get tricked into removing checks too easily, though fastbreak certainly is a good candidate to be influenced by lag. Clients update their fastbreakers to be pretty adaptive, so they will not always generate high vls.

@LordKainzo

I have not yet come to velocity stuff. Currently i am at performance and data cleanup questions once more.

A "simple" way to let skills be used more freely is to notice which checks exactly alert for a skill and then before skill use exempt the player for the time until the skill use is finished. This time can be the next tick for some sort of skills or skill related actions (simple way is to schedule a task to unexempt), or for flying stuff to exempt for a couple of seconds maybe. If your plugin knows exactly when a skill use ends that can help. This way is still comparably simple but allows a bit of cheat use while skill use. That might be a difficulty, but probably can be spared till a little later.

It might be useful to have a look at CompatNoCheatPlus for some API use reference. Though cncp does not use timers, it does contain some examples, also an ExemptionManager implementation that might help avoiding conflicts of skills undoing each others exemptions. Also cncp might help slightly in that it loads before NCP and allows to register listeners at lowest priority which reliably get called before NCP gets the event to be able to pinpoint exemptions (NCP should not be in dependencies, the API access happens after NCP loading, controlled by cncp).

For easier testing you could use TestNCP (https://github.com/asofold/TestNCP/downloads), adding your name (or "*" for all) to the testers list, to display all violations, regardless of if they normally would get logged or not.

Bit lengthy i guess...
No idea about ender pearls currently, would be interesting with TestNCP.

@craftovski

I think you should adjust the contention and maybe delay settings rather.

Question is how your server lags, is it constant low tps, or is it longer peaks of up to seconds.

fastbreak.buckets.contention can be set to something like 6000 for starters (3 times normal value). If that is still a problem double it. That can be done a couple of times for testing. The setting is in milliseconds.

Example

checks:
  # ...
  blockbreak:
    # ...
    fastbreak:
      # ...
      # Add this section/value:
      buckets:
        contention: 6000
# ...

@fungreenfox

Make a ticket and show us parts of the logs with startup errors, also which versions of ncp and cncp you are using, for 1.4.2 i would recommend to use both latest versions on bukkitdev following development builds (18 + 211 for instance, http://www.nocheatplus.org:8080/).

I assume updating both to matching versions should do it already. Not sure about the shovels, if cncp does not start up at all, mcMMO will lead to fastBreak vioaltions of course.