Massive Core
❰❰ MassiveCraft on Bukkit ❱❱
MassiveCore | Factions | CreativeGates | Vampire
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Documentation
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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 Jan 7, 2014@MCGamer20000
Yes! Thanks so much. Took a little bit of tweaking on how to figure out how to make it run, but it worked.
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Posted Jan 6, 2014@joshcar16
I have no idea what I'm talking about anymore. Maybe it's because it's 12:30 AM where I am. :| Either way, I found this on the Factions Server Owner Guide:
Common Errors
UnsupportedClassVersionError unsupported major.minor version
Your version of Java is outdated. Update to at least Java 7. Do you already have Java 7? Then perhaps you have Java 6 installed as well and for some reason the Java 6 is used when launching the minecraft server. Uninstall Java 6.
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Posted Jan 6, 2014@MCGamer20000
Yes, I click the download button at the top of this page and it says it is from December 11th and that it is a release version.
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Posted Jan 6, 2014@joshcar16
Are you using the most recent version of MCore?
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Posted Jan 6, 2014@MCGamer20000
Thanks for taking the time to make detailed response. I just checked my server's log and these are some specifics:
[20:23:30] [Server thread/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:184) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:308) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:231) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:255) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:233) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks] Caused by: java.lang.UnsupportedClassVersionError: com/massivecraft/mcore/MCore : Unsupported major.minor version 51.0
[20:23:31] [Server thread/ERROR]: Could not load 'plugins\Factions.jar' in folder 'plugins' org.bukkit.plugin.UnknownDependencyException: mcore
Here is my server's log pastbin: http://pastebin.com/Et00L12U
All help is appreciated.
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Posted Jan 6, 2014@killerline10168
Actually, there's no bukkit for 1.7.4 or 1.7.3 (yet) and I don't think there will ever be. The reason is because the protocol (the way the client communicates with the server, including what can be communicated and in what way) is the same as the protocol for 1.7.2, meaning that 1.7.3 and 1.7.4 clients can connect to a 1.7.2 server.
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Posted Jan 6, 2014@joshcar16
If this didn't help, could it be an "oops I put the file in the wrong folder" type of thing?
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Posted Jan 5, 2014@killerline10168
Thanks for responding. I am currently running Java 7 Build 45 and Bukkit 1.7.2 and Craftbukkit 1.7.2-R0.2. I know for a fact that Mcore isn't being ran by my server because when I drag it out of my server folder, it should say that it can't because it is in use. I can drag it out and nothing happens. All I'm trying to do is get it to work so I can run factions. Any help is much appreciated.
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Posted Jan 5, 2014@joshcar16
Do you have Java 7? Or bukkit 1.7.4 INSTEAD of 1.7.2? Any error logs?
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Posted Jan 3, 2014For some reason when I run my server, Mcore doesn't create the mstore file or any type of config folder. Can someone please help? Btw my Java is updated.
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Posted Jan 1, 2014@Greency99
Here either :/
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Posted Dec 30, 2013It doesnt work with spigot
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Posted Dec 29, 2013@djkll
That means your server is using java 6, this plugin only supports java 7.
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Posted Dec 24, 2013I wanted to change things in this plugin but i get a compile error of this class = PS.java and on switch (key) how to fix it? Sorry... google translate...
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Posted Dec 24, 2013Actually never mind, this plugin doesn't seem to be the cause, sorry, if a moderator could remove my post, that would be helpful thanks.
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Posted Dec 24, 2013Since I got this plugin for factions, the only plugin on my server that will work IS factions, I have no idea what is causing this and no errors are being thrown, the only sign of errors is that NO commands except default vanilla commands and factions commands work. It simply comes up with 'Unknown Command type help for help'
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Posted Dec 24, 2013Hi in the plugin more i have this error: [GRAVE] 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:184) at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305) at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230) at org.bukkit.craftbukkit.v1_6_R3.CraftServer.loadPlugins(CraftServer.java:241) at org.bukkit.craftbukkit.v1_6_R3.CraftServer.<init>(CraftServer.java:219) at net.minecraft.server.v1_6_R3.PlayerList.<init>(PlayerList.java:56) at net.minecraft.server.v1_6_R3.DedicatedPlayerList.<init>(SourceFile:11) at net.minecraft.server.v1_6_R3.DedicatedServer.init(DedicatedServer.java:107) at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:393) at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583) Caused by: java.lang.UnsupportedClassVersionError: com/massivecraft/mcore/MCore : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:80) at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:249) at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:173) ... 9 more
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Posted Dec 22, 2013@josecampos
I think you have an outdated version of MCore.
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Posted Dec 22, 2013Got this issue on a mcpc+ 1.6.4 server.
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Posted Dec 21, 2013It Said this
[13:35:38 INFO]: This server is running CraftBukkit version git-Bukkit-1.6.4-R2. 0-23-ge8eb325-b2941jnks (MC: 1.7.2) (Implementing API version 1.7.2-R0.1-SNAPSHO T) [13:35:39 ERROR]: Could not load 'plugins\mcore.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: net/mi necraft/server/v1_6_R3/PlayerInventory at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j ava:184) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager. java:305) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager .java:230) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.ja va:255) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:23 3) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [c raftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14 ) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.jav a:126) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java :420) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6 17) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_6_R3/PlayerIn ventory at com.massivecraft.mcore.MCore.getMCoreGsonBuilder(MCore.java:81) [?:? ] at com.massivecraft.mcore.MCore.<clinit>(MCore.java:66) [?:?] at java.lang.Class.forName0(Native Method) [?:1.7.0_45] at java.lang.Class.forName(Unknown Source) [?:1.7.0_45] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j ava:173) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] ... 9 more Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_6_R3.Player Inventory at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader .java:70) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader. java:53) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at java.lang.ClassLoader.loadClass(Unknown Source) [?:1.7.0_45] at java.lang.ClassLoader.loadClass(Unknown Source) [?:1.7.0_45] at com.massivecraft.mcore.MCore.getMCoreGsonBuilder(MCore.java:81) [?:? ] at com.massivecraft.mcore.MCore.<clinit>(MCore.java:66) [?:?] at java.lang.Class.forName0(Native Method) [?:1.7.0_45] at java.lang.Class.forName(Unknown Source) [?:1.7.0_45] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j ava:173) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] ... 9 more [13:35:39 ERROR]: Could not load 'plugins\CreativeGates.jar' in folder 'plugins'
org.bukkit.plugin.UnknownDependencyException: mcore at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager .java:195) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.ja va:255) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:23 3) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [c raftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14 ) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.jav a:126) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java :420) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6 17) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] [13:35:39 ERROR]: Could not load 'plugins\Factions.jar' in folder 'plugins' org.bukkit.plugin.UnknownDependencyException: mcore at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager .java:195) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.ja va:255) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:23 3) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [c raftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14 ) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.jav a:126) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java :420) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks] at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6 17) [craftbukkit.jar:git-Bukkit-1.6.4-R2.0-23-ge8eb325-b2941jnks]