Custom TNT block doesn't work when on a server 1.12.2

[DeaSTl]

java.util.concurrent.ExecutionException: net.minecraft.util.ReportedException: Exception while updating neighbours
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_191]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_191]
	at net.minecraft.util.Util.runTask(Util.java:54) [Util.class:?]
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:798) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities(DedicatedServer.java:415) [DedicatedServer.class:?]
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:743) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:592) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191]
Caused by: net.minecraft.util.ReportedException: Exception while updating neighbours
	at net.minecraft.world.World.neighborChanged(World.java:647) ~[World.class:?]
	at net.minecraft.world.World.notifyNeighborsOfStateChange(World.java:567) ~[World.class:?]
	at net.minecraft.world.World.notifyNeighborsRespectDebug(World.java:507) ~[World.class:?]
	at net.minecraft.world.World.markAndNotifyBlock(World.java:439) ~[World.class:?]
	at net.minecraftforge.common.ForgeHooks.onPlaceItemIntoWorld(ForgeHooks.java:941) ~[ForgeHooks.class:?]
	at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:200) ~[ItemStack.class:?]
	at net.minecraft.server.management.PlayerInteractionManager.processRightClickBlock(PlayerInteractionManager.java:507) ~[PlayerInteractionManager.class:?]
	at net.minecraft.network.NetHandlerPlayServer.processTryUseItemOnBlock(NetHandlerPlayServer.java:769) ~[NetHandlerPlayServer.class:?]
	at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.processPacket(CPacketPlayerTryUseItemOnBlock.java:68) ~[CPacketPlayerTryUseItemOnBlock.class:?]
	at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.processPacket(CPacketPlayerTryUseItemOnBlock.java:13) ~[CPacketPlayerTryUseItemOnBlock.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(PacketThreadUtil.java:21) ~[PacketThreadUtil$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_191]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_191]
	at net.minecraft.util.Util.runTask(Util.java:53) ~[Util.class:?]
	... 5 more
Caused by: java.lang.NoSuchMethodError: net.minecraft.entity.item.EntityTNTPrimed.setVelocity(DDD)V
	at com.dna.everythingisbad.block.BlockStupidTNT.explode(BlockStupidTNT.java:99) ~[BlockStupidTNT.class:?]
	at net.minecraft.block.BlockTNT.onBlockDestroyedByPlayer(BlockTNT.java:82) ~[BlockTNT.class:?]
	at net.minecraft.block.BlockTNT.neighborChanged(BlockTNT.java:59) ~[BlockTNT.class:?]
	at net.minecraft.block.state.BlockStateContainer$StateImplementation.neighborChanged(BlockStateContainer.java:508) ~[BlockStateContainer$StateImplementation.class:?]
	at net.minecraft.world.World.neighborChanged(World.java:626) ~[World.class:?]
	at net.minecraft.world.World.notifyNeighborsOfStateChange(World.java:567) ~[World.class:?]
	at net.minecraft.world.World.notifyNeighborsRespectDebug(World.java:507) ~[World.class:?]
	at net.minecraft.world.World.markAndNotifyBlock(World.java:439) ~[World.class:?]
	at net.minecraftforge.common.ForgeHooks.onPlaceItemIntoWorld(ForgeHooks.java:941) ~[ForgeHooks.class:?]
	at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:200) ~[ItemStack.class:?]
	at net.minecraft.server.management.PlayerInteractionManager.processRightClickBlock(PlayerInteractionManager.java:507) ~[PlayerInteractionManager.class:?]
	at net.minecraft.network.NetHandlerPlayServer.processTryUseItemOnBlock(NetHandlerPlayServer.java:769) ~[NetHandlerPlayServer.class:?]
	at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.processPacket(CPacketPlayerTryUseItemOnBlock.java:68) ~[CPacketPlayerTryUseItemOnBlock.class:?]
	at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.processPacket(CPacketPlayerTryUseItemOnBlock.java:13) ~[CPacketPlayerTryUseItemOnBlock.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(PacketThreadUtil.java:21) ~[PacketThreadUtil$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_191]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_191]
	at net.minecraft.util.Util.runTask(Util.java:53) ~[Util.class:?]
	... 5 more

I'm relatively new to forge 1.12 and sort of new to minecraft modding in general. I wanted to make this mod so I could figure out how it all works. I'm having trouble figuring out why it throws a NoSuchMethod Exception. Does the server even keep track of ticking entities?

Here is the full project https://github.com/DeaSTL/EverythingIsBad

[Draco18s]

  On 8/6/2019 at 6:56 PM, DeaSTl said:

Does the server even keep track of ticking entities?

Expand  

Of course it does. Why would the server--the authoritative source for all things--not know about ticking entities.

 

Your problem is that the function you're calling only exists on the client:

 

    /**
     * Updates the entity motion clientside, called by packets from the server
     */
    @SideOnly(Side.CLIENT)
    public void setVelocity(double x, double y, double z)
    {
        this.motionX = x;
        this.motionY = y;
        this.motionZ = z;
    }

If you want to modify motion on the server, just set the values directly. They're public.

[DeaSTl]

  On 8/6/2019 at 7:33 PM, Draco18s said:

Of course it does. Why would the server--the authoritative source for all things--not know about ticking entities.

 

Your problem is that the function you're calling only exists on the client:

 

    /**
     * Updates the entity motion clientside, called by packets from the server
     */
    @SideOnly(Side.CLIENT)
    public void setVelocity(double x, double y, double z)
    {
        this.motionX = x;
        this.motionY = y;
        this.motionZ = z;
    }

If you want to modify motion on the server, just set the values directly. They're public.

Expand  

So do I need to make a custom entity for this block when it explodes. Also when I did try to make a entity that extends EntityTNTPrimed, I was confused on weather I need to register a custom entity or if it's just registered when it's spawned. there is a class in com.dna.everythingisbad.entity

[Animefan8888]

  On 8/6/2019 at 7:55 PM, DeaSTl said:

So do I need to make a custom entity for this block when it explodes

Expand  

Yes and it can extend EntityTNTPrimed.

 

  On 8/6/2019 at 7:55 PM, DeaSTl said:

I was confused on weather I need to register a custom entity

Expand  

You need to register every entity that you want to exist in the world.

[DeaSTl]

  On 8/6/2019 at 9:15 PM, Animefan8888 said:

Yes and it can extend EntityTNTPrimed.

 

You need to register every entity that you want to exist in the world.

Expand  

Thank, you so much, I think it works now. But i'm just wondering why setVelocity is client side only.

[DavidM]

  On 8/7/2019 at 1:24 AM, DeaSTl said:

But i'm just wondering why setVelocity is client side only.

Expand  

It is used to update the motion of entities on the client-side.

It is used by packets from the server.