Massive Core
❰❰ MassiveCraft on Bukkit ❱❱
MassiveCore | Factions | CreativeGates | Vampire
MassiveBooks | MassiveHat | MassiveTickets
❰❰ Full Documentation ❱❱
Documentation
❰❰ Techy Things ❱❱
GitHub | Report a Bug
What is MassiveCore?
MassiveCore is a Bukkit plugin that contains components the MassiveCraft developers use for developing other Bukkit plugins:
- ItemStack and Inventory serialization
- Commands
- Plugin Integration
- Data storage with JSON
- Disc IO
- … and much more …
Install
- Stop your server.
- Put MassiveCore.jar in your plugins folder.
- Start your server again.
Plugins Using MassiveCore
Internet Connections
MassiveCore sends anonymous usage statistics to bstats.org when your server starts and downloads the latest sponsor configuration file from massivecraft.com hourly. You can disable these internet connections by setting "metricsEnabled" and "sponsorEnabled" to false at the very bottom of the main configuration file.
Official Server

Join in and play with us on the official Factions RPG Minecraft Server!







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Posted Apr 13, 2014@CryLegend
Doesnt really work :/
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Posted Apr 13, 20141.7.8 homemade mcore link.
Like it if it works for you!
Use at your own risks.
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Posted Apr 13, 2014@MCTylerPVP
That's because plugins rely on code that uses data for an older MC release. For example, 1.7.7 and lower used this: import org.bukkit.craftbukkit.v1_7_R2.*
While 1.7.8 uses this: import org.bukkit.craftbukkit.v1_7_R3.*
It's all in the programming code... Notice the last bit was changed, R2 to R3.
You could easily take the source code and recompile the plugin to support this change, if you know how. I've done this to keep certain plugins on my server working flawlessly.
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Posted Apr 12, 2014@JugadorNinja
Hardly nothing else works with 1.7.8 or you guys know something I don't?
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Posted Apr 12, 20141.7.8 plz
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Posted Apr 12, 2014Any idea on how long it will be for an update to 1.7.8?
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Posted Apr 12, 2014plz update to 1.7.8 plz
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Posted Apr 12, 2014@lolo71370
They are very busy updating the plugin, just give them some time! @GitHub
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Posted Apr 12, 2014When update to 1.7.8 Please?
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Posted Apr 10, 2014this is what happens: [09:32:49 ERROR]: Could not load 'plugins/mcore.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: com/massivecraft/mcore/MCore : Unsupported major.minor version 51.0 at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at org.bukkit.craftbukkit.v1_7_R2.CraftServer.loadPlugins(CraftServer.java:350) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at org.bukkit.craftbukkit.v1_7_R2.CraftServer.<init>(CraftServer.java:312) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at net.minecraft.server.v1_7_R2.PlayerList.<init>(PlayerList.java:63) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at net.minecraft.server.v1_7_R2.DedicatedPlayerList.<init>(SourceFile:14) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at net.minecraft.server.v1_7_R2.DedicatedServer.init(DedicatedServer.java:126) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:426) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] Caused by: java.lang.UnsupportedClassVersionError: com/massivecraft/mcore/MCore : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) [?:1.6.0_65] at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) [?:1.6.0_65] at java.lang.ClassLoader.defineClass(ClassLoader.java:621) [?:1.6.0_65] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) [?:1.6.0_65] at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) [?:1.6.0_65] at java.net.URLClassLoader.access$000(URLClassLoader.java:58) [?:1.6.0_65] at java.net.URLClassLoader$1.run(URLClassLoader.java:197) [?:1.6.0_65] at java.security.AccessController.doPrivileged(Native Method) [?:1.6.0_65] at java.net.URLClassLoader.findClass(URLClassLoader.java:190) [?:1.6.0_65] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at java.lang.ClassLoader.loadClass(ClassLoader.java:306) [?:1.6.0_65] at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [?:1.6.0_65] at java.lang.Class.forName0(Native Method) [?:1.6.0_65] at java.lang.Class.forName(Class.java:249) [?:1.6.0_65] at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-14-g8f8716c-b3039jnks] ... 9 more
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Posted Apr 10, 2014@TheRecovery007
It's a little hard to update to 1.7.6 if Bukkit hasn't updated yet.
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Posted Apr 9, 2014Thank you! It works.
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Posted Apr 9, 2014Update to 1.7.6
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Posted Apr 8, 2014I have mcore and factions on my server. But, I updated mcore and factions and now its not working. mcore is not showing up. I re-installed mcore and factions but nothing worked. I check my console and no errors or info about mcore or factions is coming up. This same problem has happen with my friend. I have the latest java update. Please help
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Posted Apr 8, 2014Hi all My MCore isnt working on my server so therefore my factions and creative gates dont work it gives me an error like this: ERROR: Could not load 'plugins\mcore.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R2/PlayerInventory I have scearched on the internet and have found that it is to do with a plugin interfering with the mcore itself Here is a list of plugins on my server ArenaCTF ArenaFutbol ArenaPaintball ArenaSpleef BattleArena Citizens CreativeGates EssentialPrankPack Essentials EssentialsChat EssentialsProtect EssentialsSpawn iConomy InfiniteMachines LibsDisguises Lift Minigames MobArena Parkour PermissionsEx Prankster ProtocolLib-2.3.0 Punishmental SparklingTools_v1.1.0 Venchant WorldEdit WorldGuard Factions mcore
they are all (to my knowledge) up to date and working (apart from the mcore ones that is) If anyone knows anything about this please reply Thanks so much KINSLER123
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Posted Apr 8, 2014@MarkehMe
Here's Java 8 Instructions for Linux Ubuntu Server, Hope it helps... Java 8
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Posted Apr 7, 2014@badboy99882
Uninstall Java 6.
http://www.massivecraft.com/factions-owner#common-errors
If you're on windows: - Open Add or Remove Programs - Find Java 6 (NOT 7) - Uninstall it
If you're on Mac, heres an awesome guide: http://www.monkehworks.com/set-java-7-as-default-jvm-on-mac-osx-mountain-lion
If you're on a linux box you must be using a package manager like rpm/yum/apt-get. However this is different per distribution.
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Posted Apr 7, 2014@MarkehMe
i did it said======== [05:43:49 ERROR]: Could not load 'plugins/mcore.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: com/massivecraft/mcore/MCore : Unsupported major.minor version 51.0 at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:350) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:312) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] Caused by: java.lang.UnsupportedClassVersionError: com/massivecraft/mcore/MCore : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) [?:1.6.0_65] at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) [?:1.6.0_65] at java.lang.ClassLoader.defineClass(ClassLoader.java:621) [?:1.6.0_65] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) [?:1.6.0_65] at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) [?:1.6.0_65] at java.net.URLClassLoader.access$000(URLClassLoader.java:58) [?:1.6.0_65] at java.net.URLClassLoader$1.run(URLClassLoader.java:197) [?:1.6.0_65] at java.security.AccessController.doPrivileged(Native Method) [?:1.6.0_65] at java.net.URLClassLoader.findClass(URLClassLoader.java:190) [?:1.6.0_65] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at java.lang.ClassLoader.loadClass(ClassLoader.java:306) [?:1.6.0_65] at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [?:1.6.0_65] at java.lang.Class.forName0(Native Method) [?:1.6.0_65] at java.lang.Class.forName(Class.java:249) [?:1.6.0_65] at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] ... 9 more [05:43:49 ERROR]: Could not load 'plugins/BossMessage.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: net/PixelizedMC/BossMessage/Main : Unsupported major.minor version 51.0 at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:350) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:312) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] Caused by: java.lang.UnsupportedClassVersionError: net/PixelizedMC/BossMessage/Main : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) [?:1.6.0_65] at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) [?:1.6.0_65] at java.lang.ClassLoader.defineClass(ClassLoader.java:621) [?:1.6.0_65] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) [?:1.6.0_65] at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) [?:1.6.0_65] at java.net.URLClassLoader.access$000(URLClassLoader.java:58) [?:1.6.0_65] at java.net.URLClassLoader$1.run(URLClassLoader.java:197) [?:1.6.0_65] at java.security.AccessController.doPrivileged(Native Method) [?:1.6.0_65] at java.net.URLClassLoader.findClass(URLClassLoader.java:190) [?:1.6.0_65] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at java.lang.ClassLoader.loadClass(ClassLoader.java:306) [?:1.6.0_65] at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [?:1.6.0_65] at java.lang.Class.forName0(Native Method) [?:1.6.0_65] at java.lang.Class.forName(Class.java:249) [?:1.6.0_65] at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] ... 9 more [05:43:49 ERROR]: Could not load 'plugins/Factions.jar' in folder 'plugins' org.bukkit.plugin.UnknownDependencyException: mcore at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:216) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:350) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:312) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks]
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Posted Apr 7, 2014@badboy99882
You need Java 7.
https://www.java.com/en/download/manual.jsp
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Posted Apr 6, 2014how do i fix this [22:21:30 ERROR]: Could not load 'plugins/mcore.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: com/massivecraft/mcore/MCore : Unsupported major.minor version 51.0 at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:350) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:312) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] Caused by: java.lang.UnsupportedClassVersionError: com/massivecraft/mcore/MCore : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) [?:1.6.0_65] at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) [?:1.6.0_65] at java.lang.ClassLoader.defineClass(ClassLoader.java:621) [?:1.6.0_65] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) [?:1.6.0_65] at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) [?:1.6.0_65] at java.net.URLClassLoader.access$000(URLClassLoader.java:58) [?:1.6.0_65] at java.net.URLClassLoader$1.run(URLClassLoader.java:197) [?:1.6.0_65] at java.security.AccessController.doPrivileged(Native Method) [?:1.6.0_65] at java.net.URLClassLoader.findClass(URLClassLoader.java:190) [?:1.6.0_65] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at java.lang.ClassLoader.loadClass(ClassLoader.java:306) [?:1.6.0_65] at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [?:1.6.0_65] at java.lang.Class.forName0(Native Method) [?:1.6.0_65] at java.lang.Class.forName(Class.java:249) [?:1.6.0_65] at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) [CraftBukkit.jar:git-Bukkit-1.7.2-R0.3-2-g85f5776-b3023jnks] ... 9 more