Auto disconnecting after 1 second after joining server.

[ghost]

[19:06:17] [Client thread/ERROR] [FML/]: SimpleChannelHandlerWrapper exception
io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(8) + length(4) exceeds writerIndex(8): SlicedByteBuf(ridx: 8, widx: 8, cap: 8/8, unwrapped: UnpooledHeapByteBuf(ridx: 1, widx: 9, cap: 9/9))
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:99) ~[MessageToMessageDecoder.class:?]
    at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) ~[MessageToMessageCodec.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) [DefaultChannelPipeline.class:?]
    at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) [EmbeddedChannel.class:?]
    at cpw.mods.fml.common.network.internal.FMLProxyPacket.func_148833_a(FMLProxyPacket.java:77) [FMLProxyPacket.class:?]
    at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212) [ej.class:?]
    at net.minecraft.client.multiplayer.PlayerControllerMP.func_78765_e(PlayerControllerMP.java:273) [bje.class:?]
    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1602) [bao.class:?]
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973) [bao.class:?]
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898) [bao.class:?]
    at net.minecraft.client.main.Main.main(SourceFile:148) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_25]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_25]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_25]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(8) + length(4) exceeds writerIndex(8): SlicedByteBuf(ridx: 8, widx: 8, cap: 8/8, unwrapped: UnpooledHeapByteBuf(ridx: 1, widx: 9, cap: 9/9))
    at io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1160) ~[AbstractByteBuf.class:?]
    at io.netty.buffer.AbstractByteBuf.readInt(AbstractByteBuf.java:611) ~[AbstractByteBuf.class:?]
    at pneumaticCraft.common.network.LocationIntPacket.fromBytes(LocationIntPacket.java:41) ~[LocationIntPacket.class:?]
    at pneumaticCraft.common.network.PacketSetLogisticsFluidFilterStack.fromBytes(PacketSetLogisticsFluidFilterStack.java:39) ~[PacketSetLogisticsFluidFilterStack.class:?]
    at cpw.mods.fml.common.network.simpleimpl.SimpleIndexedCodec.decodeInto(SimpleIndexedCodec.java:17) ~[SimpleIndexedCodec.class:?]
    at cpw.mods.fml.common.network.simpleimpl.SimpleIndexedCodec.decodeInto(SimpleIndexedCodec.java:7) ~[SimpleIndexedCodec.class:?]
    at cpw.mods.fml.common.network.FMLIndexedMessageToMessageCodec.decode(FMLIndexedMessageToMessageCodec.java:77) ~[FMLIndexedMessageToMessageCodec.class:?]
    at cpw.mods.fml.common.network.FMLIndexedMessageToMessageCodec.decode(FMLIndexedMessageToMessageCodec.java:17) ~[FMLIndexedMessageToMessageCodec.class:?]
    at io.netty.handler.codec.MessageToMessageCodec$2.decode(MessageToMessageCodec.java:81) ~[MessageToMessageCodec$2.class:?]
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89) ~[MessageToMessageDecoder.class:?]
    ... 18 more

[bookerthegeek]

For the love of God put your logs on pastebin and link them. Or use ghist.

[ghost]

now it's more readable.