java.lang.NullPointerException at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a

Andrew George
  • java.lang.NullPointerException at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a Andrew George

    I don't understand what this means, someone please tell me how to fix this issue

    ---- Minecraft Crash Report ----
    // Sorry :(
    
    Time: 4/12/14 12:31 AM
    Description: Unexpected error
    
    java.lang.NullPointerException
        at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a(NetClientHandler.java:956)
        at net.minecraft.network.packet.Packet24MobSpawn.func_73279_a(SourceFile:87)
        at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
        at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1967)
        at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
        at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
        at net.minecraft.client.main.Main.main(SourceFile:101)
        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 net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
    
    
    A detailed walkthrough of the error, its code path and all known details is as follows:
    ---------------------------------------------------------------------------------------
    
    -- Head --
    Stacktrace:
        at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a(NetClientHandler.java:956)
        at net.minecraft.network.packet.Packet24MobSpawn.func_73279_a(SourceFile:87)
        at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
    
    -- Affected level --
    Details:
        Level name: MpServer
        All players: 1 total; [EntityClientPlayerMP['soccergod_203'/1111, l='MpServer', x=187.50, y=76.62, z=236.50]]
        Chunk stats: MultiplayerChunkCache: 5
        Level seed: 0
        Level generator: ID 00 - default, ver 1. Features enabled: false
        Level generator options: 
        Level spawn location: World: (180,64,240), Chunk: (at 4,4,0 in 11,15; contains blocks 176,0,240 to 191,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
        Level time: 99 game time, 99 day time
        Level dimension: 0
        Level storage version: 0x00000 - Unknown?
        Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
        Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
        Forced entities: 13 total; [EntityTFNagaSegment['unknown'/1337, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1336, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1339, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1338, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1341, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1340, l='MpServer', x=0.00, y=0.00, z=0.00], EntityClientPlayerMP['soccergod_203'/1111, l='MpServer', x=187.50, y=76.62, z=236.50], EntityTFNagaSegment['unknown'/1343, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1342, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1346, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1344, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1335, l='MpServer', x=0.00, y=0.00, z=0.00], EntityTFNagaSegment['unknown'/1345, l='MpServer', x=0.00, y=0.00, z=0.00]]
        Retry entities: 0 total; []
        Server brand: fml,forge
        Server type: Integrated singleplayer server
    Stacktrace:
        at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:440)
        at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2312)
        at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:863)
        at net.minecraft.client.main.Main.main(SourceFile:101)
        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 net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
    
    -- System Details --
    Details:
        Minecraft Version: 1.6.4
        Operating System: Windows 7 (x86) version 6.1
        Java Version: 1.7.0_25, Oracle Corporation
        Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
        Memory: 120882464 bytes (115 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 MB)
        JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
        AABB Pool Size: 4625 (259000 bytes; 0 MB) allocated, 4625 (259000 bytes; 0 MB) used
        Suspicious classes: FML and Forge are installed
        IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
        FML: MCP v8.11 FML v6.4.49.965 Minecraft Forge 9.11.1.965 38 mods loaded, 38 mods active
        mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        FML{6.4.49.965} [Forge Mod Loader] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        Forge{9.11.1.965} [Minecraft Forge] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        CodeChickenCore{0.9.0.7} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        NotEnoughItems{1.6.1.8} [Not Enough Items] (notenoughitems-1.6.1.8.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        hearts{1.0} [Hearts] ([1.6.4][Forge]HeartCrystal1.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        deconstruction{2.0.1} [The Deconstruction Mod] ([MC1.6.4]Deconstruction[v2.0.1].jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        Autoutils{1.0.1} [Autoutils] (autoutils-1.6.4-1.0.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        bspkrsCore{v5.2(1.6.4)} [bspkrsCore] (bspkrscore-5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        EndlessCity{1.0} [Endless City] (city11.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        CustomSpawner{2.3.1} [DrZhark's CustomSpawner] (CustomMobSpawner_2.3.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        DamageIndicatorsMod{2.9.2.3} [Damage Indicators] (damage-indicators-2.9.2.3.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        MoCreatures{6.0.1} [DrZhark's Mo'Creatures Mod] (DrZharks_MoCreatures_Mod_v6.0.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        Hats{2.1.1} [Hats] (Hats2.1.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        iChunUtil{2.4.0} [iChunUtil] (iChunUtil2.4.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        MobAmputation{2.0.1} [MobAmputation] (MobAmputation2.0.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        mochickens{Pre 1.4} [Mo' Chickens] (moChickensCore1.6.4V1.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        mochickensitems{Pre 1.4} [Mo' Chickens Items] (moChickensItems1.6.4V1.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        mochickensmobs{Pre 1.4} [Mo' Chickens Mobs] (moChickensMobs1.6.4V1.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        mod_MoreCowsMod{release 1.2.1+} [mod_MoreCowsMod] (MoreCows_164_MCF.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        NEIPlugins{1.1.0.6} [NEI Plugins] (nei-plugins-1.1.0.6.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        NEIAddons{1.9.4.r51} [NEI Addons] (neiaddons-1.6.2-1.9.4.r51.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        NEIAddons|AE{1.9.4.r51} [NEI Addons: Applied Energistics] (neiaddons-1.6.2-1.9.4.r51.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        NEIAddons|CraftingTables{1.9.4.r51} [NEI Addons: Crafting Tables] (neiaddons-1.6.2-1.9.4.r51.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        NEIAddons|ExtraBees{1.9.4.r51} [NEI Addons: Extra Bees] (neiaddons-1.6.2-1.9.4.r51.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        NEIAddons|Forestry{1.9.4.r51} [NEI Addons: Forestry] (neiaddons-1.6.2-1.9.4.r51.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        NEIAddons|MiscPeripherals{1.9.4.r51} [NEI Addons: Misc Peripherals] (neiaddons-1.6.2-1.9.4.r51.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        OreSpawn{164.15} [OreSpawn] (orespawn164v15.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        Randomite{1.2.0} [Randomite] (randomite-1.6.4-1.2.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        SpecialMobs{2.6} [Special Mobs] (SpecialMobs_2.6_for_MC_1.6.x.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        TragicMC{1.1.4} [TragicMC] (TragicMC_v1.1.5.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        TreeCapitator{Forge 1.6.4.r09} [Treecapitator] (treecapitator-1.6.4-r09.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        TwilightForest{1.20.3} [The Twilight Forest] (twilightforest-1.20.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        Waypoints{1.0.0} [Waypoints] (waypoints-1.6.4-1.0.0.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        weaponmod{1.6.2 v1.13.6} [Balkon's WeaponMod] (WeaponMod.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
        ForgeMultipart{1.0.0.227} [Forge Multipart] (ForgeMultipart-universal-1.6.4-1.0.0.227.jar) Unloaded->Constructed->Pre-initialized-
    

  • Short answer: A function in the NetClientHandler namespace is pointing at a empty (Null) variable.

    At stack exchange there may be people who want to help you debug this, here at Arqade we normally do not code or fix something after reading an error report unless the problem is obvious.

    To make your problem more obvious you could tell us what is happening. Does MC start, does it crash during a game, does this happen when playing on a server, etc. We still know jack shit about your error with just this error report. It looks like it is a multiplayer problem though.

    Try reinstall MC fresh, update graphics card, reinstall java clean.

Tags
minecraft
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