The Bukkit Consulting Firm - Solving all your Bukkit-related challenges!

Discussion in 'Bukkit Help' started by M1sT3rM4n, Aug 25, 2011.

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    Do you know how to run a bukkit server evenly across all my cpu cores equally.
    Anyone know how to set java up to do that?
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    Please Tell me for This Problem ?

    [SEVERE] java.lang.NullPointerException
    19:47:53 [SEVERE]       at net.minecraft.server.Chunk.a(
    19:47:53 [SEVERE]       at net.minecraft.server.World.b(
    19:47:53 [SEVERE]       at net.minecraft.server.World.getEntities(
    19:47:53 [SEVERE]       at net.minecraft.server.Entity.move(
    19:47:53 [SEVERE]       at net.minecraft.server.EntityItem.s_(
    19:47:53 [SEVERE]       at net.minecraft.server.World.entityJoinedWorld(
    19:47:53 [SEVERE]       at net.minecraft.server.WorldServer.entityJoinedWorld(
    19:47:53 [SEVERE]       at net.minecraft.server.World.playerJoinedWorld(
    19:47:53 [SEVERE]       at net.minecraft.server.World.tickEntities(
    19:47:53 [SEVERE]       at net.minecraft.server.MinecraftServer.h(
    19:47:53 [SEVERE]       at
    19:47:53 [SEVERE]       at
    19:47:53 [SEVERE] Unexpected exception
            at net.minecraft.server.Chunk.a(
            at net.minecraft.server.World.b(
            at net.minecraft.server.World.getEntities(
            at net.minecraft.server.Entity.move(
            at net.minecraft.server.EntityItem.s_(
            at net.minecraft.server.World.entityJoinedWorld(
            at net.minecraft.server.WorldServer.entityJoinedWorld(
            at net.minecraft.server.World.playerJoinedWorld(
            at net.minecraft.server.World.tickEntities(
            at net.minecraft.server.MinecraftServer.h(
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    Try running Chunkster.
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    People can't join my server, help?
    I changed the server-ip to nothing already

    Attached Files:

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    You're using Hamachi. Others who wish to join your server also have to use Hamachi too.
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    Yes, I know. They do
    If I want to join their server I can. They also don't know the problem
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    They need to fill out the correct information for your Hamachi network, including using the right IP and PW.
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    They fill in the correct information but it doesn't work. Only I can go on the server ;s
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    Do you see any errors in the Java console when they try to connect?
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    i c were doing a great job solving problems :) lol i luv this thread
  13. Offline


    What the Shit Again = =?

    2011-10-23 16:12:30 [SEVERE] java.util.ConcurrentModificationException
    2011-10-23 16:12:30 [SEVERE]     at java.util.AbstractList$Itr.checkForComodification(
    2011-10-23 16:12:30 [SEVERE]     at java.util.AbstractList$
    2011-10-23 16:12:30 [SEVERE]     at java.util.AbstractCollection.removeAll(
    2011-10-23 16:12:30 [SEVERE]     at net.minecraft.server.World.cleanUp(
    2011-10-23 16:12:30 [SEVERE]     at net.minecraft.server.MinecraftServer.h(
    2011-10-23 16:12:30 [SEVERE]     at
    2011-10-23 16:12:30 [SEVERE]     at
    2011-10-23 16:12:30 [SEVERE] Unexpected exception
        at java.util.AbstractList$Itr.checkForComodification(
        at java.util.AbstractList$
        at java.util.AbstractCollection.removeAll(
        at net.minecraft.server.World.cleanUp(
        at net.minecraft.server.MinecraftServer.h(
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    No, I can join the server but my friends can't and it doesn't give errors
    But when I open the server with CraftBukkit Starter it only opens the cmd, my friends says there need to open 2 things
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    I haven't seen a way to do this. Bukkit is designed to be multi-threaded, and therefore, multi-core, but plugins (such as worldedit) have to follow suit to do costly computations in seperate threads to avoid freezing the server.

    You would find a bigger performance boost by moving your world files to a ramdisk (if possible). If you do, make sure to make a script that takes regular backups.
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    I need help with permissions. When I log on to my server im not added to the group of users its still herp and derpina and new guy and server owner. My name isnt there. Please help
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    As the error states, Java has run out of memory. This can be prevented somewhat by the use of switches when starting up bukkit. We could look over what might be causing the problem if you post your server startup script.

    Which permissions plugin are you using? Permissions 3.x?

    Switch to PEX if possible.

    Looks like a plugin incompatability. Are you running Essentials?

    Try to do it without hamachi.

    EDIT by Moderator: merged posts, please use the edit button instead of double posting.
    Last edited by a moderator: May 19, 2016
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    How can I make my server freebuild and no whitelist without having a lot of greifers?
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    u will need some form of permissions plugin. that way u can allow/deny players to do things from plugins to building.

    you can try this"
    idk if it will work against 1337 or watever the newest rb is...
    jk that just limits where mobs spawn...i could make you a a plugin for it but it would probably cause a significant increase in lag.

    did @Pencil get banned? i haven't seen any of his trolling lately :( he almost has as many infractions as you Mr. Man!

    EDIT by Moderator: merged posts, please use the edit button instead of double posting.
    Last edited by a moderator: May 19, 2016
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    no, not install it sir.
    but i found it now it's "WorldGuard 5.3" sir :)
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    Problem : Server just turns off, no errors, no nothing - All it print in the console is "Killed"
    I was sleeping and my server was 3 hours offline

    Specs and what not

    we have Java 1.7

    We have multiple worlds aswell so far 3

    Craft Bukkit 1337

    The Operating system is Centos 6

    I5 - 750
    16gb DDR3
    Bukkit 1337
    Xms 15360 Xmx 15360

    Essentials 2.6.4
    LWC latest
    Factions Dev
    xcraftgate Latest
    Hawkeye 1.05
    world edit Dev
    world guard Dev
    Iconomy 5
    Permissions ex
    And a few more i cant remember

    Also We get Ram Flucuations of 4gb every 5 minutes so it will be 15gb 14gb Etc to 10gb then restet
  23. Offline


    Hello consulting group ! :) I don't know if I can ask my question here.

    I'm building a community for minecraft and me and my staff have a big problem...

    We have about 6 worlds.
    We want only PVP and Mobs/Animals on the world called PVP for others no pvp, no animals, no mobs.

    Is there a plugin to do that ? I did a lot a research but nothing worked pretty well.

    Thank you very much in advance !
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    Hello, do you know how i make my server use more CPU? I only have 7 plugins, and the server got 1500 MB of ram. It sometimes lagg very much.
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    1. What plugins are you running?
    2. What is the size of your world
    3. Are you hosting at home or renting from a VPS.
    Alternatively, you can check this out,

    Try this;

    You'll need a multi-world plugin, and probably some other stuff,

    • World Guard & World Edit

    With 3MB upload speed, you should be Fine hosting 3/4 players on.

    Your Java.exe should be using resources, when you hit task manager, what's your starting command for the server?
    Also, did you try right clicking on the process in task manager and setting priority to high?

    EDIT by Moderator: merged posts, please use the edit button instead of double posting.
    Last edited by a moderator: Oct 10, 2018
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    CommandBook, ServerSave, Ptweaks, CreativeGates, WorldEdit, MobDisguise, PlgSetspawn, MultiHome, Prefixer.
    I just started a new one today, its 2.83 MB. This problem also occured before.
    Home with Hamachi.

    I'd like to say, that this problem started to occure some days before this. Suddenly the server just started to lagg.
  27. Offline


    1. There may be an error, you just need to catch it.
    2. You can try a new server running command;
    3. You should update your plugins (i.e. iConomy 5->6)
    4. You can try re-installing Java.
    5. It could be one of your plugin's giving your server a hard time, after <x> amount of time, thus why RAM fluctuations and perhaps server "dying"

    I'm not familiar with Hamachi, what's your Operating System your using? If your hosting from home, what's your down/upload speed?

    also you could try one of these commands;

    EDIT by Moderator: merged posts, please use the edit button instead of double posting.
    Last edited by a moderator: May 19, 2016
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    Okay, so you have 3 MB upload speed. What's the average user you have on?
    W7 user's a lot of resources, that is very tedious, just as "For your Information :)"
  30. Offline


    I mostly have 3/4 players on :p Note: This also happens when i DON'T have players on.
    And, the server ( java.exe ) don't use any CPU.
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