Internal Exception - "packet was larger than I expected"

I'm having this exact same issue (although I was not on Realms; I was on a whitelisted server).

Died in the nether right by my portal (inside it, actually) and after clicking "Respawn" nothing happened. The multiplayer menu is still showing me as logged in (i.e. the number of people logged in shows me there).

Same error code is produced as the OP posted.

Also as OP reports, single player is fine and restarting the game has no effect.

I am not so familiar with how Realms work, but is there a way you can access your player file in the *playerdata* folder?
And did you click "Respawn" immediately or did you wait some time?

@Marcono1234

For me, as mentioned, I was on a whitelisted server rather than on Realms. I was not the host of the server so I was unable to access the playerdata folder and can't comment on whether or not host could have done so.

I clicked Respawn immediately upon death. After a few attempts without it responding I exited the game.

As a follow up to my original reply: After a little time, the other person who was logged in left the game (either he logged out or some error occurred, I can't be sure). When he tried to re-enter the game again he was unable to enter and was getting the same error I saw. The only way we were able to resolve this was to contact the host and have him restart the server. Since then, no issues.

1.8.8 exception:

Internal Exception: io.netty.handler.codec.DecoderException:java.IOException: Packet 0/0 (gn) was larger than i expected, found 25 bytes extra whilst reading packet 0

Is this still an issue in the most recent versions (currently that is 1.10.2, or 16w42a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.

i have this problem too

i am on minecraft 1.11 but on a server

when i join, i get this messege :io.netty.handler.codec.DecoderException: java.io.IOException: Packet 0/69 (spakettitle) was larger than I expected, found 11 bytes extra whilst reading packet 69 ,

im on a whitelist i hard something about them moving to nether gate and i walk thro my gate and then this

Internal exception: io.netty.handler.codec.DecoderException: java.IOException: Packet 0/32 (je) was larger than I expected, found 2048 Bytes extra whilst reading packet 32

word for word form the make i tried to lag back on and this keep coming up plz help me fix this i spent a lot of time and money on the server and i have full updated game

im using iolo system mechanic pro idk if that will help of not

update: both whitelist on Skyblock.online has the some thing popping up when want to the nether it happen now i can play at all on the server

I am getting the same message as neal bartlett,

Internal exception: io.netty.handler.codec.DecoderException: java.IOException: Packet 0/32 (je) was larger than I expected, found 2048 Bytes extra whilst reading packet 32

It started when i tried to go to the nether. I am unsure how to fix this. I have tried downloading another version of the launcher and it is doing the same thing. please help! I really wanna be able to play.