Extended Properties Crash on external Server while working in eclipse

Bedrock_Miner · September 20, 2014

Heyho Guys!

I created a extendedProperties class. When an EntityConstructingEvent is fired for a player, these properties are assigned to him. While initializing the properties, a array list is created.

When an EntityJoinWorldEvent is then fired for the player, an update package is sent to the client side.

This works fine on a Server started by Eclipse. But the compiled mod on a server crashes because the array list is null. Why can this happen?! The EntityConstructing is fired before and had no errors.

Bedrock_Miner · September 20, 2014

Extended Properties:

public class PropertiesElements implements IExtendedEntityProperties {

private EntityPlayer entity;
private boolean serverSide;

public PropertiesElements(EntityPlayer entity) {
	this.entity = entity;
	this.serverSide = entity instanceof EntityPlayerMP;
	this.activeElements = new ArrayList<Elements>(); //"Elements" is a enum I use
	this.cooldown = new int[10];
}

private List<Elements> activeElements;
private int[] cooldown;

//...

//Getter and Setter

public void updateElements() { //Called while EntityJoinEvent is active
	if (this.serverSide) {
		Main.packetHandler.sendTo(new PropertiesElementsPacket(this.getActiveElements()), (EntityPlayerMP) this.entity);
	}
}

public List<Elements> getActiveElements() { //Called by updateElements()
	Main.log("ArrayList == null ? " + (this.activeElements == null)); //Prints out true!
	return new ArrayList<Elements>(this.activeElements); //Here it crashes!
}
}

EventHandler:

@SubscribeEvent
public void onEntityConstructing(EntityConstructing e) {
	if (e.entity instanceof EntityPlayer) {
		Main.log("Called Constructing");
		e.entity.registerExtendedProperties(PropertiesElements.IDENTIFIER, new PropertiesElements((EntityPlayer) e.entity));
	}
}

@SubscribeEvent
public void onEntityJoinWorld(EntityJoinWorldEvent e) {
	if (!e.world.isRemote && e.entity instanceof EntityPlayer) {
		Main.log("Called Join for " + e.entity.getCommandSenderName());
		PropertiesElements.get((EntityPlayer) e.entity).updateElements();
	}
}

Both of the events are called, the constructing event first, then the join event.

Bedrock_Miner · September 21, 2014

Are the packets really that important? It crashes before the first one is sent...

PropertiesElementsPacket:

public class PropertiesElementsPacket extends BasePacket {

private List<Elements> elements;

public PropertiesElementsPacket() {}

public PropertiesElementsPacket(List<Elements> elements) {
	this.elements = new ArrayList<Elements>(elements);
}

@Override
public void encodeInto(ChannelHandlerContext ctx, ByteBuf buffer) {
	buffer.writeByte(this.elements.size());
	for (Elements e : this.elements) {
		buffer.writeByte(e.getID());
	}
}

@Override
public void decodeFrom(ChannelHandlerContext ctx, ByteBuf buffer) {
	byte size = buffer.readByte();
	this.elements = new ArrayList<Elements>();
	for (byte b = 0; b < size; b ++) {
		byte id = buffer.readByte();
		if (id > 0)
			this.elements.add(Elements.values()[id]);
	}
}

@Override
public void handleClientSide(EntityPlayer player) {
	PropertiesElements.get(player).setActiveElements(this.elements);
}

@Override
public void handleServerSide(EntityPlayer player) {
}

@Override
public boolean doesHandleSide(Side side) {
	return side == Side.CLIENT;
}

}

Superclass BasePacket:

/**
* AbstractPacket class. Should be the parent of all packets wishing to use the PacketPipeline.
*/
public abstract class BasePacket {

    /**
     * Encode the packet data into the ByteBuf stream. Complex data sets may need specific data handlers (See @link{cpw.mods.fml.common.network.ByteBuffUtils})
     *
     * @param ctx    channel context
     * @param buffer the buffer to encode into
     */
    public abstract void encodeInto(ChannelHandlerContext ctx, ByteBuf buffer);

    /**
     * Decode the packet data from the ByteBuf stream. Complex data sets may need specific data handlers (See @link{cpw.mods.fml.common.network.ByteBuffUtils})
     *
     * @param ctx    channel context
     * @param buffer the buffer to decode from
     */
    public abstract void decodeFrom(ChannelHandlerContext ctx, ByteBuf buffer);

    /**
     * Returns true if the packet should be called on the given side. If it returns false the packets are ignored.
     */
    public abstract boolean doesHandleSide(Side side);

    /**
     * Handle a packet on the client side. Note this occurs after decoding has completed.
     *
     * @param player the player reference
     */
    public abstract void handleClientSide(EntityPlayer player);

    /**
     * Handle a packet on the server side. Note this occurs after decoding has completed.
     *
     * @param player the player reference
     */
    public abstract void handleServerSide(EntityPlayer player);
}

Packet Handler:

@PacketHandler.Sharable
public class PacketHandler extends MessageToMessageCodec<FMLProxyPacket, BasePacket> {

    private EnumMap<Side, FMLEmbeddedChannel> channels;
    private final LinkedList<Class<? extends BasePacket>> packets = new LinkedList<Class<? extends BasePacket>>();
    private boolean isPostInitialised = false;

    /**
     * Register your packet with the pipeline. Discriminators are automatically set.
     *
     * @param clazz the class to register
     *
     * @return whether registration was successful. Failure may occur if 256 packets have been registered or if the registry already contains this packet
     */
    public boolean registerPacket(Class<? extends BasePacket> clazz) {
        if (this.packets.size() > 256) {
        	FMLLog.warning("Packetcount exceeded!", new Object[0]);
            return false;
        }

        if (this.packets.contains(clazz)) {
            FMLLog.warning("The Packet " + clazz.getName() + " is already registered!", new Object[0]);
            return false;
        }

        if (this.isPostInitialised) {
        	FMLLog.warning("Registration in postInitializing mode not possible!", new Object[0]);
            return false;
        }

        this.packets.add(clazz);
        return true;
    }

    @Override
    protected void encode(ChannelHandlerContext ctx, BasePacket msg, List<Object> out) throws Exception {
        ByteBuf buffer = Unpooled.buffer();
        Class<? extends BasePacket> clazz = msg.getClass();
        if (!this.packets.contains(msg.getClass())) {
            throw new NullPointerException("No Packet Registered for: " + msg.getClass().getCanonicalName());
        }

        byte discriminator = (byte) this.packets.indexOf(clazz);
        buffer.writeByte(discriminator);
        msg.encodeInto(ctx, buffer);
        FMLProxyPacket proxyPacket = new FMLProxyPacket(buffer.copy(), ctx.channel().attr(NetworkRegistry.FML_CHANNEL).get());
        out.add(proxyPacket);
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, FMLProxyPacket msg, List<Object> out) throws Exception {
        ByteBuf payload = msg.payload();
        byte discriminator = payload.readByte();
        Class<? extends BasePacket> clazz = this.packets.get(discriminator);
        if (clazz == null) {
            throw new NullPointerException("No packet registered for discriminator: " + discriminator);
        }

        BasePacket pkt = clazz.newInstance();

        if (!pkt.doesHandleSide(FMLCommonHandler.instance().getEffectiveSide())) {
        	FMLLog.warning("Cannot handle packet \"" + clazz.getCanonicalName() + "\" on " + FMLCommonHandler.instance().getEffectiveSide().name().toLowerCase() + " side. The send call for the packet should be removed!", new Object[0]);
        	return;
        }

        pkt.decodeFrom(ctx, payload.slice());

        EntityPlayer player;
        switch (FMLCommonHandler.instance().getEffectiveSide()) {
            case CLIENT:
                player = this.getClientPlayer();
                pkt.handleClientSide(player);
                break;

            case SERVER:
                INetHandler netHandler = ctx.channel().attr(NetworkRegistry.NET_HANDLER).get();
                player = ((NetHandlerPlayServer) netHandler).playerEntity;
                pkt.handleServerSide(player);
                break;

            default:
        }

        out.add(pkt);
    }

    public void initialise(String modid) {
        this.channels = NetworkRegistry.INSTANCE.newChannel(modid, this);
    }

    public void postInitialise() {
        if (this.isPostInitialised) {
            return;
        }

        this.isPostInitialised = true;
        Collections.sort(this.packets, new Comparator<Class<? extends BasePacket>>() {

            @Override
            public int compare(Class<? extends BasePacket> clazz1, Class<? extends BasePacket> clazz2) {
                int com = String.CASE_INSENSITIVE_ORDER.compare(clazz1.getCanonicalName(), clazz2.getCanonicalName());
                if (com == 0) {
                    com = clazz1.getCanonicalName().compareTo(clazz2.getCanonicalName());
                }

                return com;
            }
        });
    }

    @SideOnly(Side.CLIENT)
    private EntityPlayer getClientPlayer() {
        return Minecraft.getMinecraft().thePlayer;
    }

    /**
     * Send this message to everyone.
     * <p/>
     * Adapted from CPW's code in cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper
     *
     * @param message The message to send
     */
    public void sendToAll(BasePacket message) {
        this.channels.get(Side.SERVER).attr(FMLOutboundHandler.FML_MESSAGETARGET).set(FMLOutboundHandler.OutboundTarget.ALL);
        this.channels.get(Side.SERVER).writeAndFlush(message);
    }

    /**
     * Send this message to the specified player.
     * <p/>
     * Adapted from CPW's code in cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper
     *
     * @param message The message to send
     * @param player  The player to send it to
     */
    public void sendTo(BasePacket message, EntityPlayerMP player) {
        this.channels.get(Side.SERVER).attr(FMLOutboundHandler.FML_MESSAGETARGET).set(FMLOutboundHandler.OutboundTarget.PLAYER);
        this.channels.get(Side.SERVER).attr(FMLOutboundHandler.FML_MESSAGETARGETARGS).set(player);
        this.channels.get(Side.SERVER).writeAndFlush(message);
    }

    /**
     * Send this message to everyone within a certain range of a point.
     * <p/>
     * Adapted from CPW's code in cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper
     *
     * @param message The message to send
     * @param point   The {@link cpw.mods.fml.common.network.NetworkRegistry.TargetPoint} around which to send
     */
    public void sendToAllAround(BasePacket message, NetworkRegistry.TargetPoint point) {
        this.channels.get(Side.SERVER).attr(FMLOutboundHandler.FML_MESSAGETARGET).set(FMLOutboundHandler.OutboundTarget.ALLAROUNDPOINT);
        this.channels.get(Side.SERVER).attr(FMLOutboundHandler.FML_MESSAGETARGETARGS).set(point);
        this.channels.get(Side.SERVER).writeAndFlush(message);
    }

    /**
     * Send this message to everyone within the supplied dimension.
     * <p/>
     * Adapted from CPW's code in cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper
     *
     * @param message     The message to send
     * @param dimensionId The dimension id to target
     */
    public void sendToDimension(BasePacket message, int dimensionId) {
        this.channels.get(Side.SERVER).attr(FMLOutboundHandler.FML_MESSAGETARGET).set(FMLOutboundHandler.OutboundTarget.DIMENSION);
        this.channels.get(Side.SERVER).attr(FMLOutboundHandler.FML_MESSAGETARGETARGS).set(dimensionId);
        this.channels.get(Side.SERVER).writeAndFlush(message);
    }

    /**
     * Send this message to the server.
     * <p/>
     * Adapted from CPW's code in cpw.mods.fml.common.network.simpleimpl.SimpleNetworkWrapper
     *
     * @param message The message to send
     */
    public void sendToServer(BasePacket message) {
        this.channels.get(Side.CLIENT).attr(FMLOutboundHandler.FML_MESSAGETARGET).set(FMLOutboundHandler.OutboundTarget.TOSERVER);
        this.channels.get(Side.CLIENT).writeAndFlush(message);
    }
}

I took the code of the PacketHandler from some tutorials

TheGreyGhost · September 21, 2014

Hi

Pls show your crash log?

-TGG

Bedrock_Miner · September 21, 2014

[08:26:52] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker
[08:26:52] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker
[08:26:52] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLServerTweaker
[08:26:52] [main/INFO] [FML]: Forge Mod Loader version 7.10.18.1180 for Minecraft 1.7.10 loading
[08:26:53] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_10, running on Linux:amd64:3.6.7, installed at /usr/lib/jvm/java-7-oracle/jre
[08:26:53] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[08:26:53] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[08:26:53] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[08:26:53] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[08:26:53] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[08:26:55] [main/INFO] [FML]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
[08:26:55] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper
[08:26:55] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLDeobfTweaker

[08:26:57] [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.server.MinecraftServer}
[08:26:59] [server thread/INFO]: Starting minecraft server version 1.7.10
[08:26:59] [server thread/INFO] [MinecraftForge]: Attempting early MinecraftForge initialization
[08:26:59] [server thread/INFO] [FML]: MinecraftForge v10.13.0.1180 Initialized
[08:27:00] [server thread/INFO] [FML]: Replaced 182 ore recipies
[08:27:00] [server thread/INFO] [MinecraftForge]: Completed early MinecraftForge initialization
[08:27:00] [server thread/INFO] [FML]: Searching /home/kd35523/server/minecraft_2031/mods for mods
[08:27:00] [server thread/INFO] [FML]: Forge Mod Loader has identified 11 mods to load
[08:27:01] [server thread/INFO] [FML]: Processing ObjectHolder annotations
[08:27:01] [server thread/INFO] [FML]: Found 341 ObjectHolder annotations
[08:27:01] [server thread/INFO] [FML]: Configured a dormant chunk cache size of 0
[08:27:02] [server thread/INFO] [FML]: Extending Potions Array for the mod magicum.
[08:27:02] [server thread/INFO] [FML]: Applying holder lookups
[08:27:02] [server thread/INFO] [FML]: Holder lookups applied
[08:27:02] [server thread/INFO]: Loading properties
[08:27:02] [server thread/INFO]: Default game type: SURVIVAL
[08:27:02] [server thread/INFO]: Generating keypair
[08:27:02] [server thread/INFO]: Starting Minecraft server on minehost69.host-unlimited.de:25670
[08:27:03] [server thread/INFO] [ArchimedesShips]: Reading metarotation file: default.mrot
[08:27:03] [server thread/INFO] [FML]: Found not existing Item Name in item_elements.csv! Item: minecraft:slime_block
[08:27:03] [server thread/INFO] [FML]:   Unknown recipe class! com.bedrockminer.signcraft.crafting.UnmirrorRecipe Modder please refer to net.minecraftforge.oredict.RecipeSorter
[08:27:03] [server thread/INFO] [FML]: Forge Mod Loader has successfully loaded 11 mods
[08:27:03] [server thread/INFO]: Preparing level "world"
[08:27:03] [server thread/INFO] [FML]: Injecting existing block and item data into this server instance
[08:27:03] [server thread/INFO] [FML]: Applying holder lookups
[08:27:04] [server thread/INFO] [FML]: Holder lookups applied
[08:27:04] [server thread/INFO] [FML]: Loading dimension 0 (world) (net.minecraft.server.dedicated.DedicatedServer@786d0dda)
[08:27:04] [server thread/INFO] [FML]: Loading dimension 1 (world) (net.minecraft.server.dedicated.DedicatedServer@786d0dda)
[08:27:04] [server thread/INFO] [FML]: Loading dimension -1 (world) (net.minecraft.server.dedicated.DedicatedServer@786d0dda)
[08:27:04] [server thread/INFO]: Preparing start region for level 0
[08:27:05] [server thread/INFO]: Preparing spawn area: 30%
[08:27:05] [server thread/INFO]: Done (2,312s)! For help, type "help" or "?"
[08:27:05] [server thread/INFO]: Unknown command. Try /help for a list of commands
[08:29:32] [user Authenticator #1/INFO]: UUID of player _Bedrock_Miner_ is 79b0a319-92fd-40ca-ba24-c857866ff166
[08:29:32] [server thread/INFO] [FML]: Called Constructing
[08:29:32] [Netty IO #3/INFO] [FML]: Client protocol version 1
[08:29:32] [Netty IO #3/INFO] [FML]: Client attempting to join with 12 mods : [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected] v1.7.0,[email protected],[email protected],[email protected],[email protected]
[08:29:32] [Netty IO #3/INFO] [FML]: Attempting connection with missing mods [] at CLIENT
[08:29:33] [server thread/INFO] [FML]: [server thread] Server side modded connection established
[08:29:33] [server thread/INFO]: _Bedrock_Miner_[/84.154.100.67:55262] logged in with entity id 227 at (-536.1634642766006, 84.0, 348.82530851642457)
[08:29:33] [server thread/INFO]: _Bedrock_Miner_ joined the game
[08:29:33] [server thread/INFO] [FML]: Called Join for _Bedrock_Miner_
[08:29:33] [server thread/ERROR] [FML]: HandshakeCompletionHandler exception
java.lang.NullPointerException
        at java.util.ArrayList.<init>(ArrayList.java:151) ~[?:1.7.0_10]
        at com.bedrockminer.magicum.extendedproperties.PropertiesElements.getActiveElements(PropertiesElements.java:65) ~[PropertiesElements.class:?]
        at com.bedrockminer.magicum.extendedproperties.PropertiesElements.updateElements(PropertiesElements.java:84) ~[PropertiesElements.class:?]
        at com.bedrockminer.magicum.event.handler.EventHandlerExtendedProperties.onEntityJoinWorld(EventHandlerExtendedProperties.java:38) ~[EventHandlerExtendedProperties.class:?]
        at cpw.mods.fml.common.eventhandler.ASMEventHandler_16_EventHandlerExtendedProperties_onEntityJoinWorld_EntityJoinWorldEvent.invoke(.dynamic) ~[?:?]
        at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:51) ~[ASMEventHandler.class:?]
        at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:122) ~[EventBus.class:?]
        at net.minecraft.world.World.func_72838_d(World.java:1307) ~[ahb.class:?]
        at net.minecraft.server.management.ServerConfigurationManager.func_72377_c(ServerConfigurationManager.java:288) ~[oi.class:?]
        at net.minecraft.server.management.ServerConfigurationManager.a(ServerConfigurationManager.java:161) ~[oi.class:?]
        at cpw.mods.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:173) ~[NetworkDispatcher.class:?]
        at cpw.mods.fml.common.network.handshake.NetworkDispatcher.completeHandshake(NetworkDispatcher.java:446) ~[NetworkDispatcher.class:?]
        at cpw.mods.fml.common.network.internal.HandshakeCompletionHandler.channelRead0(HandshakeCompletionHandler.java:17) ~[HandshakeCompletionHandler.class:?]
        at cpw.mods.fml.common.network.internal.HandshakeCompletionHandler.channelRead0(HandshakeCompletionHandler.java:11) ~[HandshakeCompletionHandler.class:?]
        at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[simpleChannelInboundHandler.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.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [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.network.NetworkSystem.func_151269_c(NetworkSystem.java:165) [nc.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:335) [lt.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]
[08:29:33] [server thread/ERROR] [FML]: There was a critical exception handling a packet on channel FML
java.lang.NullPointerException
        at java.util.ArrayList.<init>(ArrayList.java:151) ~[?:1.7.0_10]
        at com.bedrockminer.magicum.extendedproperties.PropertiesElements.getActiveElements(PropertiesElements.java:65) ~[PropertiesElements.class:?]
        at com.bedrockminer.magicum.extendedproperties.PropertiesElements.updateElements(PropertiesElements.java:84) ~[PropertiesElements.class:?]
        at com.bedrockminer.magicum.event.handler.EventHandlerExtendedProperties.onEntityJoinWorld(EventHandlerExtendedProperties.java:38) ~[EventHandlerExtendedProperties.class:?]
        at cpw.mods.fml.common.eventhandler.ASMEventHandler_16_EventHandlerExtendedProperties_onEntityJoinWorld_EntityJoinWorldEvent.invoke(.dynamic) ~[?:?]
        at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:51) ~[ASMEventHandler.class:?]
        at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:122) ~[EventBus.class:?]
        at net.minecraft.world.World.func_72838_d(World.java:1307) ~[ahb.class:?]
        at net.minecraft.server.management.ServerConfigurationManager.func_72377_c(ServerConfigurationManager.java:288) ~[oi.class:?]
        at net.minecraft.server.management.ServerConfigurationManager.a(ServerConfigurationManager.java:161) ~[oi.class:?]
        at cpw.mods.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:173) ~[NetworkDispatcher.class:?]
        at cpw.mods.fml.common.network.handshake.NetworkDispatcher.completeHandshake(NetworkDispatcher.java:446) ~[NetworkDispatcher.class:?]
        at cpw.mods.fml.common.network.internal.HandshakeCompletionHandler.channelRead0(HandshakeCompletionHandler.java:17) ~[HandshakeCompletionHandler.class:?]
        at cpw.mods.fml.common.network.internal.HandshakeCompletionHandler.channelRead0(HandshakeCompletionHandler.java:11) ~[HandshakeCompletionHandler.class:?]
        at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[simpleChannelInboundHandler.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.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[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.network.NetworkSystem.func_151269_c(NetworkSystem.java:165) [nc.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:335) [lt.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]
[08:29:33] [server thread/WARN]: Failed to handle packet for /84.154.100.67:55262
java.lang.NullPointerException
        at cpw.mods.fml.common.network.internal.FMLProxyPacket.func_148833_a(FMLProxyPacket.java:101) ~[FMLProxyPacket.class:?]
        at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212) ~[ej.class:?]
        at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165) [nc.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:335) [lt.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]
[08:29:33] [server thread/INFO]: _Bedrock_Miner_ lost connection: TextComponent{text='Internal server error', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}}
[08:29:33] [server thread/INFO]: _Bedrock_Miner_ left the game

TheGreyGhost · September 21, 2014

Hi

I didn't find anything obvious; I think the most likely explanation is that you've either accidentally provided a second (empty?) constructor that doesn't initialise activeElements properly, another section of code is overwriting it after construction, or your packet handler is stuffing something up.

I'd suggest adding a pile more System.out.println() to the constructor, getter/setter, and packet handler, to help track it down.

-TGG

Bedrock_Miner · September 21, 2014

The constructor there is the only one I have for the class.

The value is private and the setter is not used.

Bedrock_Miner · September 21, 2014

If I try the compiled mod on a local server it works. Could this have something to do with the internet connection? Dont think so but is it possible?

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Extended Properties Crash on external Server while working in eclipse

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