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"Connection Lost. Internal Exception: io.netty.handler.codec.EndcoderException: java.io.UTFDataFormatException: malformed input

joe97

By joe97
in Support & Bug Reports

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joe97 Tree Puncher

joe97

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Posted

Hello :D

Im running Mod servers for me and my friends for arround 6 years now, but now i don´t know what to do. I´m trying to set up a Forge Modserver, Version 1.19.2 / 43.2.21. We have arround 105 Mods wich all work fine on singleplayer. On my PC and also on the PC of my friends. 

Now i set up a server with the same Forge version. I put in the same mods and started it.... it runs fine. No real errors or something .... except Netty Server IO errors. 

 

When i try to connect with my Client it works fine the first few seconds. Loadingscreen... gray Screen ... disconnected. Server also tells me this. But no further informations. i paste you the log of my server an also from my client. maybe you can help me. 

The error which is displayed by my client is: "Connection Lost. Internal Exception: io.netty.handler.codec.EndcoderException: java.io.UTFDataFormatException: malformed input arround gyte 4"

 

 

 

Server Log: 

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Client Log: 

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joe97 Tree Puncher

joe97

Posted
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Posted

Any of this mods wants to sync the configs server and client but it doesnt work.... why... getting little bit angry. i dont understand the problem. started de server wiht debug log ... i paste it here. 

I try it with pastebin... 

 

Server Log (debug)

Paint_Ninja World Shaper

Paint_Ninja

Posted
Posted

I'm afraid it looks like you'll need to do a binary search to find the broken mod and report back which mod that was. :/

The binary search is a way of finding a faulty thing among a lot of other things, without having to remove the things one-by-one. This is useful for finding a broken mod among hundreds of mods, without having to spend time testing the mods one-by-one. The procedure is simple:

  1. Remove half of the existing things, and put them aside.
  2. Run the program / game.
  3. Does the issue still exist?
    1. If YES: Repeat from step 1 with the current things.
    2. IF NO: Swap out the current things with the ones set aside, and repeat from step 1.
  4. Repeat this process until the problematic thing/s have been found.

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