Caught exception from Minecraft Forge (forge)

[lumpman2]

I've tried to set up a 1.12 server with about a hundred mods; the mods folder between my client and server are exactly the same. When I try to connect to the server, it immediately disconnects with the error com.google.common.util.concurrent.UncheckedExecutionException: net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Minecraft Forge (forge)

I've noticed that other people had problems with mods throwing exceptions, but I can't imagine why it's Forge here. The version of Forge is correct for all mods (14.23.3.2702, latest), and the same in client and server.

 

Here's the latest.log with multiple instances of that error near the end:

https://gist.github.com/lumpman2/f67fa85e093580c35acfd0c138e6204d

[MDW01]

Could you post the crash report as well?

[lumpman2]

There was no crash; the client only refuses to connect to the server because of that error. I checked for any crash logs in the crash-reports folder, but there were none from the times that I tried to connect to the server.

[MDW01]

I think one of the mods failed to load can you check the mods tab to make sure all of the mods are enabled and such?

Also are you able to go into single player?

[lumpman2]

I know that I can get into single player and the mods appear to work well, but I can't check right now whether any of the mods are disabled.

[DaemonUmbra]

Try removing MrTJPCore and the mods that depend on it, I don't know much about coremods but I've heard they can cause errors that don't always get traced back to the offending coremod.

Noticed this in the log at the beginning, again I'm not that knowledgeable about coremods but I'm very cautious about when they throw even a warning.

  Quote

[01:39:20] [main/ERROR] [FML]: Coremod mrtjp.core.handler.CorePlugin: Unable to class load the plugin java.lang.ClassNotFoundException: mrtjp.core.handler.CorePlugin

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[MDW01]

Yea that would probably cause it I guess I missed that. Yes, you are correct.

  On 5/23/2018 at 5:40 PM, DaemonUmbra said:

they can cause errors that don't always get traced back to the offending coremod.

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[lumpman2]

I tried removing MrTJPCore and its dependent mods (all 6 ProjectRed mods, including Base, Fabrication, Integration, Lighting, Mechanical, and World) from both the client and server, and the same error comes up when trying to connect to the server.

EDIT: I also checked the mods list and none of them appear to be disabled.

latest.log:

https://gist.github.com/lumpman2/7835a098a47aea8f00b32cb36c8f3707

Edited May 24, 2018 by lumpman2

[lumpman2]

I'm now able to connect to the server after downgrading forge to the lowest version possible for the mods that I'm using (14.23.3.2675). All I did was reinstall forge on my client, switch profiles, and completely reset the server with the new version.