How to setup a Ubuntu CraftBukkit Server (x64) running Java x64

I gotta say TnT that this thread helped me quite a bit getting a Minecraft server going on an Amazon EC2 instance. I'm even using your rsync script to back up to a remote machine. I guess I'm average in linux, so this really helped me out along the way.

Would you be able to point me in the right direction for enhancing the rsync script to perhaps auto-number the minecraft backups and then delete the oldest ones automatically? It would be cool to have a rolling group of backups rather than a single entity.

Cheers!

 

Hi this thread was helpfull for me too, and it also works with JAVA 7 x64
Thank you!

 

@Skadar
I don't have one whipped up, but essentially what you would do is rsync it to your remote directory and gzip up those files into one archive based on the date. You just need to add in the archiving into your current script. PM me if you can't figure it out, I'll whip one up.

 

Whats going on with mine? it wont load sever and im confused now. This is what shows up in cmd prompt everytime...

[Lnet.minecraft.server.Statistic;@1995d80
146 recipes
[Lnet.minecraft.server.Statistic;@1995d80
16 achievements
16:30:26 [INFO] Starting minecraft server version Beta 1.5_02
16:30:26 [INFO] Loading properties
16:30:26 [INFO] Starting Minecraft server on *:25565
16:30:26 [WARNING] **** FAILED TO BIND TO PORT!
16:30:26 [WARNING] The exception was: java.net.BindException: Address already in
use: JVM_Bind
16:30:26 [WARNING] Perhaps a server is already running on that port?
>no
16:30:36 [SEVERE] java.lang.NullPointerException
16:30:36 [SEVERE] at net.minecraft.server.MinecraftServer.b(MinecraftServe
r.java:394)
16:30:36 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:291)
16:30:36 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:394)
16:30:36 [SEVERE] Unexpected exception
java.lang.NullPointerException
at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:394)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:291)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:394)
>

 

How typical. I find this thread only now, after figuring all this out for myself >___<

It's nice to know that I did things the right way though.

My only question, does the "-d 64" parameter actually make any difference? This is the only thing I didn't do.

 

@MrPendulum
It doesn't hurt to try, but it is there to force the 64 bit binaries by default. Should improve performance.

 

Thanks for the answer.

I'm migrating to my new server tonight. In testing I'm already seeing a dramatic improvement in chunk loading performance, but that's most likely caused by jumping from a 900MHz Celeron to a dual core 1.66GHz Atom D510

 

My server runs on openJDK, so I don't think this is accurate.

 

@TnT
in thinking about renting a Debian vServer (i could choose Ubuntu to, but i get Confixx for free when using Debian). Maybe im overreaching myself, since i never had anything to do with linux.
I guess your tutorial works as well with Debian?
Maybe i will chooso Ubuntu after all cuz i just like it and there is a great german Ubuntu-Community.
But setting up a Minecraftserver and (maybe) also a Webserver without experience on that OS will not be easy.

 

@Taranis01
Yes, my tutorial should be pretty close for Debian.

 

i have a server on windows 7 that i want to move over to a virtualbox running ubuntu server but i have no expierence with ubuntu. I've managed to install ubuntu but i don't know how to use winscp to transfer files over. Can anyone help me?

Nevermind figured out how to transfer files. Now i just need to transfer the server files from one os to the next

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

why do you use -d64? If you install java x64 you cant run anything in a 32-bit environment. Easy to check it with

Code:

java -d32 -version

You should get something like

Code:

Error: This Java instance does not support a 32-bit JVM.
Please install the desired version.

And dont replace it with

Code:

-server

"-server" option is implicit with the use of -d64 (you can find it here http://download.oracle.com/javase/1.4.2/docs/tooldocs/solaris/java.html)

 

@Samovar
The -d64 option may not help, but won't hurt either. I just haven't updated my post to reflect it.

The -server option is useless if you run a server OS, as it will use that option by default.

 

If you dont use ubuntu or a debian-based distribution, you can substitute update-alternatives by ln -s :

Code:

cd /bin/
ln -s /opt/java/64/jre1.6.0_27/bin/java

 

I have a Windows 7 x64 computer.
So if I do this I will be able to make my server run faster?
Because when I try to run 3GBs of RAM on my regular craftbukkit server it says not enought memory, but I have 4GBs on my computer.

Will this allow me to fix that?

 

what do I put as user and group for the command sudo chown <username>:<group> /opt/craftbukkit

 

Disregard my last question. So when I type ./start.sh this happens:
root@V-2559:/opt/craftbukkit# ./start.sh
Unable to access jarfile craftbukkit.jar

Someone please help me, I've been trying to get this to work and it's really frustrating.

 

@ukballer1012
Do you have a file called craftbukkit.jar in your /opt/craftbukkit directory?

Can you do an "ls -la /opt/craftbukkit" and paste the output please?

 

root@V-2559:~# ls -la /opt/craftbukkit
total 8572
drwxr-xr-x 2 root root 4096 Sep 28 01:26 .
drwxr-xr-x 4 root root 4096 Sep 28 01:17 ..
-rw-r--r-- 1 root root 8748701 Sep 28 01:20 craftbukkit-0.0.1-SNAPSHOT.jar
-rwxr-xr-x 1 root root 65 Sep 28 01:26 start.sh
root@V-2559:~#

 

@ukballer1012
Change you start.sh to have this file name: craftbukkit-0.0.1-SNAPSHOT.jar
Instead of: craftbukkit.jar

 

I don't really understand what you're telling me to do, I'm sorry. Where is the file and how do you change its name? I'm a noob so bear with me

 

hi, how do i install java?
i use 'sudo apt-get install openjdk-7-jre'(without quotations)
and i says E: Unable to locate package openjdk-7-jre
thanks for your time
plz help

 

why do you recommend ubuntu over say.. centos? what are the advantages?

 

Mostly because I'm most familiar with it. CentOS is just fine. So are most flavors of *nix.

 

Thank you. I am going nuts trying to figure out what is lagging my server. I have managed to get memory greatly under control now and usually have more then half my memory free which is great but my cpu usage is so high. The following thread is the only one other then the main thread that seems to be using the cpu much:

Code:

"Thread-12" prio=10 tid=0x00002aaac00b6000 nid=0x6b3 waiting on condition [0x000000004264d000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00000006a5754fc0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
        at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at org.bukkit.craftbukkit.ChunkCompressionThread.run(ChunkCompressionThread.java:39)
        at java.lang.Thread.run(Thread.java:722)

I am guessing that this is the chunk compression thread but is it normal for it to constantly be using 10-20% cpu? This is even with load player loading around 8 players. My main thread is usually around 140% or more. Like I said, I have a lot of memory free so I don't think that is a factor. My current start command is this:

Code:

screen -dmS minecraft java -Xmx5750M -server -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:+AggressiveOpts -XX:+CMSParallelRemarkEnabled -XX:+DisableExplicitGC -XX:MaxGCPauseMillis=500 -XX:SurvivorRatio=16 -XX:TargetSurvivorRatio=90 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -XX:UseSSE=3 -XX:PermSize=128m -XX:LargePageSizeInBytes=4m -jar craftbukkit-0.0.1-SNAPSHOT.jar nogui

I have compiled that start command from various forum threads reading different do's and do nots and then seeing what actually works best for my server. This has greatly helped my memory but my cpu does not seem to be affected.
Here is my plugin list. Most of these are small plugins and a few of them could be taken off until needed. Please focus on the specific plugins vice the quantity. Any help you all can provide would be greatly appreciated.

Code:

AUTO MESSAGE
BACKTOBODY
BEDRESPAWN
BEDROCKCONTROL
BLIFT
BLOCKPAINT
BSHORTCUT
CFBANNER
CHUNKREGENERATE
COLORME
COMMANDSIGNS
CONTROLLERBLOCK
ESSENTIALS
FACTIONS
HAWKEYE
ICONOMY
JOBS
JSONAPI
LAGMETER
LOCKETTE
MCMMO
MINECRAFTRKITPLUGIN
MOBDISGUISE
MOREMINECARTSTARTERPLUGIN
MULTIVERSE-CORE
NARROWTUXLIB
NIGHTLIGHT
NOCHEAT
NOCRAFT
NO FARM
OBUJUSTSHUTTHEHELLUP
OPENINV
PERMISSIONS BUKKIT 1.2
PERSONAL CHEST
PORTECOULISSANTE
REGISTER
RESIDENCE
SAFEFIRE
SERVERSAVE
SHOWCASE
SIMPLESPLEEF
SPAWN CONTROL
SPOUT
STARGATE
STEALTHLOGIN
SUPERPERMSBRIDGE 1.2
SUPERPICKAXE
VAMPIRE
VANILLA
VANISHNOPACKET
VIP
VOTIFIER
WEATHER RESTRICTIONS
WEBSEND
WORLDEDIT

 

do chmod +x start.sh

 

What should xms and xmx be on a 24G or 16 G server ?

 

I wouldn't set them any higher than 22 or 14-15 respectively. Depending on all the other functions the server does, I usually like to leave one, maybe two GB just for the tasks that aren't the main java thread.

XMS value can be low, around 2-4GB is just fine.

 

What would be the difference if i set Xms to 2G or 4G does it work better with 4 or it dosent matter?

 

Xms is the starting value for the heap size. I doubt you'll see much of a difference unless the server actually needs that many GB of heap space right off the bat. You can play with that value or remove it all together - the only time you'll see a performance difference is on freshly starting the server.