I'm playing around with making my own mod. It works fine in Singleplayer but when I test it on a server my client gets disconnected with error message Internal Exception: io.netty.handler.codec.EncoderException: java.lang.NullPointerException (there is no further stack trace) when I place the Portal Base block. I can reconnect just fine, but will get disconnected again when I place another of those blocks.

I haven't found much about this specific issue. Any help would be appreciated.

Code: https://github.com/eddie1101/PortalTest/

 

logs: (Though they're not very helpful, is there some way to make the error more verbose? A stack trace would really help)

Server: https://pastebin.com/JN6gnQyx

Client: https://pastebin.com/AWVavatz

 

Thanks in advance.

 

Edit: Attached .jar if you want to try to reproduce

basicportals-0.1.jar

Edited January 27, 20214 yr by octa

Repo is fixed. How do I run my client with system properties? It works on the server but when I add it to JVM arguments in the launcher's installation settings the game crashes.

Woops. Fixed the item names.

According to the docs, RegistryEvent.Register is a valid way of registering entries, so I'll stick with that since I know it better.

The repo should build now, so back to my original question: Why when placing a Portal Base does the client get disconnected from the server?

Oh, that makes sense. Do you have a suggested way of initializing that BlockPos? I can't think of anything other than assigning a symbolic value which gets verified before use, but that seems clumsy.

Edit: Nvm, I was trying to return some nbt data instead of the tileentity's actual position. Thanks for the help.

Edited January 27, 20214 yr by octa