hosting a custom pack server for some people, only me and one other person are getting this problem currently. after disconnecting from the server for any reason, the first reconnect gets as far as "loading world" then displays the error:
"Internal Exception: io.netty.handler.codec.DecoderException: java.lang.NullPointerException: Cannot invoke 'net.minecraft.client.multiplayer.ClientPacketListener.m_6198_()" because the return value of "net.minecraft.client.Minecraft.m_91403_()" is null'
after getting this error, further attempts to connect just result in the connection timing out. the client is able to reconnect after a server restart, but having to restart the server any time i want to reconnect is terrible. restarting the client does not help.
log snip: https://pastebin.com/g4sANJmc

no real idea what mod is causing the problem at this point.

• minecraft version: 1.18.2
• modpack: https://www.curseforge.com/minecraft/modpacks/bread-bank-3
• Forge: 40.1.74
• launcher: multimc
• lwjgl 3 version: 3.2.2
• java: 18.0.2.1

Please add -Dforge.logging.mojang.level=debug to the JVM arguments of your Launcher.
Launch the game and produce the error, then post debug.log from the logs folder.
Vanilla Laucnher: Launcher -> Installations -> Edit the Forge Profile you are using -> More Options -> Add the Argument to the JVM Arguments

If you using CurseForge you need to enable the debug.log in the settings.

here is a debug snippet after successfully joining the server and disconnecting: https://pastebin.com/HdufhZAS
and here is a debug snippet when trying to reconnect to the server: https://pastebin.com/JPqssXpx

Please post full debug.log from server and client.

You can use https://gist.github.com/ to upload larger text files.

Edited September 4, 20223 yr by Luis_ST

i tried multiple times to upload the full log before, i either get a 'too big' error, or in githubs case just completely crash the page. just me launching the game, failing to connect to the server and quiting makes a debug log that is 600k lines.

You can upload the file to google drive or similar pages.

If the log file is still too large, put it into a .zip file.

google drive ling for debug.log: https://drive.google.com/file/d/1Z_lnkZryAxn3C4bx5e4YzFLRYNmw2gv1/view?usp=sharing

Unfortunately i have no idea, the only thing i can tell you is that at least one Mod is badly coded.

To avoid a lot of work, make sure all Mods you use are up to date.

was finally able to update the server, still get this issue. it let me reconnect a few times without this happening, so its not every time, but it still happens sometimes.

could i get some assistance on this or will i have to make a new post?

As was said above. The error says one of your mods has badly coded network code.

The error does not say which one.

The only way to find it, is to experiment with removing mods until you find the problem mod. (Backup your world before removing mods).

 

NOTE: I am assuming you are still getting the same error after doing your update, because you don't post an updated log.