Tekkit Server Refuses To Start

[Stormman3100]

I am trying to start a tekkit server for 1.6.4 for me and my friend. I click on the Launch.bat file and I get this:

 

 

C:UsersChristian_2Desktoptekkit>java -Xmx1G -Xms512M -jar Tekkit.jar nogui

Jan 08, 2015 10:18:10 PM net.minecraft.launchwrapper.LogWrapper log

INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker

Jan 08, 2015 10:18:10 PM net.minecraft.launchwrapper.LogWrapper log

INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLServerTweak

er

Jan 08, 2015 10:18:10 PM net.minecraft.launchwrapper.LogWrapper log

INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLServerTweaker

2015-01-08 22:18:10 [iNFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965

for Minecraft 1.6.4 loading

2015-01-08 22:18:10 [iNFO] [ForgeModLoader] Java is Java HotSpot Client VM,

version 1.8.0_25, running on Windows 8.1:x86:6.3, installed at C:Program Files

(x86)Javajre1.8.0_25

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod codechicken.core.laun

ch.DepLoader does not have a MCVersion annotation, it may cause issues with this

 version of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod appeng.transformer.Ap

pEngCore does not have a MCVersion annotation, it may cause issues with this ver

sion of Minecraft

2015-01-08 22:18:10 [iNFO] [ForgeModLoader] [AppEng] Core Init

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod calclavia.lib.Calclav

iaPluginLoader does not have a MCVersion annotation, it may cause issues with th

is version of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod codechicken.core.laun

ch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issu

es with this version of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod cofh.asm.LoadingPlugi

n does not have a MCVersion annotation, it may cause issues with this version of

 Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod mods.immibis.microblo

cks.coremod.MicroblocksCoreMod does not have a MCVersion annotation, it may caus

e issues with this version of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod logisticspipes.asm.Lo

gisticsPipesCoreLoader does not have a MCVersion annotation, it may cause issues

 with this version of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod micdoodle8.mods.micco

re.MicdoodlePlugin does not have a MCVersion annotation, it may cause issues wit

h this version of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod openmods.OpenModsCore

Plugin does not have a MCVersion annotation, it may cause issues with this versi

on of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod codechicken.core.laun

ch.DepLoader does not have a MCVersion annotation, it may cause issues with this

 version of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod universalelectricity.

core.UELoader does not have a MCVersion annotation, it may cause issues with thi

s version of Minecraft

2015-01-08 22:18:10 [WARNING] [ForgeModLoader] The coremod codechicken.core.laun

ch.DepLoader does not have a MCVersion annotation, it may cause issues with this

 version of Minecraft

2015-01-08 22:18:10 [iNFO] [ForgeModLoader] Loading tweak class name cpw.mods.fm

l.common.launcher.FMLInjectionAndSortingTweaker

2015-01-08 22:18:10 [iNFO] [ForgeModLoader] Loading tweak class name cpw.mods.fm

l.common.launcher.FMLDeobfTweaker

2015-01-08 22:18:10 [iNFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.com

mon.launcher.FMLInjectionAndSortingTweaker

2015-01-08 22:18:10 [sEVERE] [ForgeModLoader] Unable to launch

java.util.ConcurrentModificationException

        at java.util.ArrayList$Itr.checkForComodification(Unknown Source)

        at java.util.ArrayList$Itr.remove(Unknown Source)

        at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)

        at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

        at java.lang.reflect.Method.invoke(Unknown Source)

        at cpw.mods.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.j

ava:48)

        at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.

java:17)

 

C:UsersChristian_2Desktoptekkit>pause

Press any key to continue . . .

 

 

I also try to start the Executable Jar File called "Tekkit" but nothing happens other than a file called ForgeModLoader-server-0 and .log.1 appear in the file, but nothing happens after words. What am I doing wrong. If you need more information I can copy and paste whatever you need. Thank You

[Curunir]

Please take all issues to the tracker. Make sure to include crash logs.

 

From the launcher log you posted, it seems that two things are going wrong:

• There seems to be only 512 MiB of RAM allocated to the server, because some system setting is overriding the default allocation.
• You are running Java 8. The server apparently does not have the hotfix included yet, instructions here.
• Always use the launch script. Do not try to run the jar files directly.

Edited January 9, 2015 by Curunir

[EvilOwl]

• There seems to be only 512 MiB of RAM allocated to the server, because some system setting is overriding the default allocation.

 

1GB (-Xmx1G)

[Curunir]

I was looking at "-Xms512M". But then again, I have yet to discover what distinguishes Xms and Xmx.

[EvilOwl]

Xms and Xmx?

Min (start) and max (limit)

[Curunir]

Well, these are still not the default values. Tekkit 1.2.9e has these in the launch script:

-Xmx3G -Xms2G

So the advice remains: Use the launch script, apply the Java fix (or downgrade to Java 7).

[EvilOwl]

100% agree