不是瞎蒙
// Shall we play a game?

Time: 15-7-12 下午9:23
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: pw/prok/imagine/collections/IndirectSet
        at net.minecraft.entity.EntityTracker.<init>(EntityTracker.java:49)
        at net.minecraft.world.WorldServer.<init>(WorldServer.java:163)
        at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:367)
        at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:336)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:631)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: pw.prok.imagine.collections.IndirectSet
        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 6 more
Caused by: java.lang.NullPointerException


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
        Minecraft Version: 1.7.10
        KCauldron Version: pw.prok:KCauldron:1.7.10-1481.144
        Operating System: Linux (amd64) version 2.6.32-504.8.1.el6.x86_64
        Java Version: 1.7.0_79, Oracle Corporation
        Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
        Memory: 1070383368 bytes (1020 MB) / 1758986240 bytes (1677 MB) up to 3728211968 bytes (3555 MB)
        JVM Flags: 2 total; -Xmx4000M -Xms500M
        AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
        IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
        FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1481 45 mods loaded, 45 mods active
        States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
        UCHIJAA        mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
        UCHIJAA        FML{7.10.99.99} [Forge Mod Loader] (cauldron-1.7.10-1.1207.01.198-server.jar)
        UCHIJAA        Forge{10.13.4.1481} [Minecraft Forge] (cauldron-1.7.10-1.1207.01.198-server.jar)
        UCHIJAA        appliedenergistics2-core{rv2-stable-10} [AppliedEnergistics2 Core] (minecraft.jar)
        UCHIJAA        ThaumicTinkerer-preloader{0.1} [Thaumic Tinkerer Core] (minecraft.jar)
        UCHIJAA        BuildCraft|Core{7.0.13} [BuildCraft] (B-buildcraft-7.0.13.jar)
        UCHIJAA        BuildCraft|Silicon{7.0.13} [BC Silicon] (B-buildcraft-7.0.13.jar)
        UCHIJAA        BuildCraft|Transport{7.0.13} [BC Transport] (B-buildcraft-7.0.13.jar)
        UCHIJAA        BuildCraft|Builders{7.0.13} [BC Builders] (B-buildcraft-7.0.13.jar)
        UCHIJAA        BuildCraft|Robotics{7.0.13} [BC Robotics] (B-buildcraft-7.0.13.jar)
        UCHIJAA        BuildCraft|Energy{7.0.13} [BC Energy] (B-buildcraft-7.0.13.jar)
        UCHIJAA        BuildCraft|Factory{7.0.13} [BC Factory] (B-buildcraft-7.0.13.jar)
        UCHIJAA        IC2{2.2.747-experimental} [IndustrialCraft 2] (T-industrialcraft-2-2.2.747-experimental.jar)
        UCHIJAA        Forestry{3.7.0.629-unstable} [Forestry for Minecraft] (T-forestry_1.7.10-3.7.0.629-unstable.jar)
        UCHIJAA        BuildCraft|Compat{7.0.8} [BuildCraft Compat] (B-buildcraft-compat-7.0.8.jar)
        UCHIJAA        flammpfeil.slashblade{mc1.7.10-r62} [SlashBlade] (B-SlashBlade-mc1.7.10-r62.jar)
        UCHIJAA        Baubles{1.0.1.10} [Baubles] (Baubles-1.7.10-1.0.1.10.jar)
        UCHIJAA        Thaumcraft{4.2.3.5} [Thaumcraft] (M-Thaumcraft-1.7.10-4.2.3.5 (1).jar)
        UCHIJAA        flammpfeil.slashblade.zephyr{1.7.2 r1.2} [SlashBladeZephyr] (B-SlashBlade_Zephyr-mc1.7.2-r1.2.2.jar)
        UCHIJAA        flammpfeil.nihil{mc1.7.x-r6} [Nihil] (B-似蛭-Nihil-mc1.7.x-r6.jar)
        UCHIJAA        flammpfeil.toyako{mc1.7.2-r1} [toyako] (B-洞爷湖-toyako-mc1.7.2-r1.jar)
        UCHIJAA        flammpfeil.fluorescentbar{mc1.7.2-r3} [fluorescentbar] (B-荧光-fluorescentbar-mc1.7.2-r3.jar)
        UCHIJAA        flammpfeil.slashblade.wanderer{mc1.7.2-r1} [SlashBladeWanderer] (B-风来剑-SlashBladeWanderer-mc1.7.2-r1.jar)
        UCHIJAA        BuildMod{v1.0} [Build Mod] (CoroUtil-1.1.1.jar)
        UCHIJAA        CoroAI{v1.0} [CoroAI] (CoroUtil-1.1.1.jar)
        UCHIJAA        ExtendedRenderer{v1.0} [Extended Renderer] (CoroUtil-1.1.1.jar)
        UCHIJAA        ConfigMod{v1.0} [Extended Mod Config] (CoroUtil-1.1.1.jar)
        UCHIJAA        appliedenergistics2{rv2-stable-10} [Applied Energistics 2] (M-appliedenergistics2-rv2-stable-10.jar)
        UCHIJAA        ThaumicTinkerer{unspecified} [Thaumic Tinkerer] (M-ThaumicTinkerer-2.5-1.7.10-507.jar)
        UCHIJAA        ForbiddenMagic{1.7.10-0.57} [Forbidden Magic] (M-Forbidden Magic-1.7.10-0.57.jar)
        UCHIJAA        InfusionBrewing{1.7.10-1.1} [InfusionBrewing] (M-IB1.7.10v1.1.jar)
        UCHIJAA        TaintedMagic{1.1.5.4} [Tainted Magic] (M-TaintedMagic-1.1.5.4.jar)
        UCHIJAA        thaumicenergistics{0.8.10.5} [Thaumic Energistics] (M-thaumicenergistics-0.8.10.5.jar)
        UCHIJAA        customnpcs{1.7.10c} [CustomNpcs] (O-CustomNPCs_1.7.10c.jar)
        UCHIJAA        BambooMod{Minecraft@MC_VERSION@ var@VERSION@} [BambooMod] (S-Bamboo-2.6.8.5.jar)
        UCHIJAA        FoodCraft{1.1.10} [FoodCraft(FoodCraft)] (S-FoodCraft-15.7.2-1.1.10-1.7.jar)
        UCHIJAA        ZombieInfection{1.1.0} [Zombie Infection] (T-1.7.10 [心殇汉化]僵尸感染Mod-V1.1.0.jar)
        UCHIJAA        mod_ecru_MapleTree{1.1.30j} [MapleTree] (T-[1.7.10]MapleTree Forge v1.1.30j.jar)
        UCHIJAA        AdvancedSolarPanel{1.7.10-3.5.1} [Advanced Solar Panels] (T-AdvancedSolarPanel-1.7.10-3.5.1[TFCN].jar)
        UCHIJAA        ThaumicHorizons{1.1.5} [Thaumic Horizons] (T-thaumichorizons-1.7.10-1.1.6.jar)
        UCHIJAA        ZAMod{v1.9.5} [Zombie Awareness] (T-僵尸意识ZombieAwareness-1.9.6.jar)
        UCHIJAA        GrimoireOfGaia{1.0.0} [Grimoire of Gaia 3] (T-盖亚魔典3(lucky_E汉化)-1.7.10-1.1.1.jar)
        UCHIJAA        InfernalMobs{1.5.4} [Infernal Mobs] (W-InfernalMobs-1.7.10.jar)
        UCHIJAA        cfm{3.4.7} [?9MrCrayfish's Furniture Mod] (W-MrCrayfishFurnitureModv3.4.7(1.7.10)-CN.jar)
        UCHIJAA        thirstmod{1.8.11} [Thirst Mod] (W-thirstmod-1.8.11.jar)
        AE2 Version: stable rv2-stable-10 for Forge 10.13.2.1291
        Forestry : Warning: You have mods that change the behavior of Minecraft, ForgeModLoader, and/or Minecraft Forge to your client:

Bukkit, Cauldron, or other Bukkit replacement

These may have caused this error, and may not be supported. Try reproducing the crash WITHOUT these mods, and report it then.
        AE2 Integration: IC2:ON, RotaryCraft:OFF, RC:OFF, BC:ON, RF:ON, RFItem:ON, MFR:OFF, DSU:OFF, FZ:OFF, FMP:OFF, RB:OFF, CLApi:OFF, Waila:OFF, Mekanism:OFF, ImmibisMicroblocks:OFF, BetterStorage:OFF
        Profiler Position: N/A (disabled)
        Player Count: 0 / 30; []
        Is Modded: Definitely; Server brand changed to 'kcauldron,cauldron,craftbukkit,mcpc,fml,forge'
        Type: Dedicated Server (map_server.txt)


不是瞎蒙
问题解决了是缺少了文件