Plugins failing to Init (NoClassDefFoundError)

Discussion in 'Bukkit Help' started by keraos, May 9, 2012.

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    Hey, so I'm running a little bukkit server for myself and a couple people, but since I updated to the last couple of beta builds, I've been finding that a lot of my plugins do not work. They all seem to register the same error: org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: which seems to be related to something called 'SimplePluginManager'. Is there something I'm missing in the update process? I can post my log as well for deeper inspection (though it appears I'd have to rename the extension).

    I did look around the forums, but didn't spot a fix offhand. I'm notoriously bad at finding things in forums though, so my deepest apologies if this is a double post v.v;

    Edit: If it helps, here's my startup script:
    IF /I "%PROCESSOR_ARCHITECTURE:~-2%"=="64" "%ProgramFiles%\Java\jre7\bin\java.exe" -Xincgc -Xmx2048M -jar "craftbukkit-1.2.5-R1.3.jar"
    IF /I "%PROCESSOR_ARCHITECTURE:~-2%"=="86"  java -Xincgc -Xmx1024M -jar "craftbukkit-1.2.5-R1.3.jar"
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    mbaxter ʇıʞʞnq ɐ sɐɥ ı

    Could you paste the full errors? :)

    Also keraos moved to appropriate forum

    EDIT by Moderator: merged posts, please use the edit button instead of double posting.
    Last edited by a moderator: May 25, 2016
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    The errors are pretty much the same for the various plugins, they're as follows:

    2012-05-09 18:58:02 [INFO] [FastObby] Enabling FastObby v2.0
    2012-05-09 18:58:02 [SEVERE] Error occurred while enabling FastObby v2.0 (Is it up to date?)
    java.lang.NoClassDefFoundError: org/bukkit/event/Event$Type
    at nl.lolmen.FO.FastObsidian.onEnable(
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(
    at org.bukkit.craftbukkit.CraftServer.loadPlugin(
    at org.bukkit.craftbukkit.CraftServer.enablePlugins(
    at net.minecraft.server.MinecraftServer.t(
    at net.minecraft.server.MinecraftServer.a(
    at net.minecraft.server.MinecraftServer.init(
    Caused by: java.lang.ClassNotFoundException: org.bukkit.event.Event$Type
    at$ Source)
    at$ Source)
    at Method)
    at Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 11 more

    Edit: TY for the move, didn't know quite where to put this :)
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    When CraftBukkit 1.1-R1 was released, a new event system for plug-ins to use was implemented, making the old system deprecated. With the release of CraftBukkit 1.1-R5/6, the old system was removed. So any plug-in which have not been updated to the new system will no longer work.

    FastObsidian was last released for build 1597, which was CraftBukkit 1.0.1-R1. You can try to contact Lolmewn the author and see if he will update it or the alternative is codename_B and some other plugin developers have been updating plugins on request in this thread.
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    Gotcha, that makes sense. Thanks for the info!
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    Are you using the new version from It should work.
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    I'm getting this error with ALL the new plugins I'm trying to download, but the ones I already have seem to work fine. I'm trying to get an MOTD mod, and ALL of them are producing that error and not loading.
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