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Can't install forge for 1.20.1, hash mishmatch error. (Linux)

didn't read faq

Posted April 30Apr 30

I get these errors when trying to install any version (this ones for 47.3.33 for instance):

Processor failed, invalid outputs:
    /home/user/.local/share/FreesmLauncher/instances/1.20.1/minecraft/libraries/net/minecraft/server/1.20.1-20230612.114412/server-1.20.1-20230612.114412-slim.jar
      Expected: 9e06bdd77ca6d95b2cced0bf372245f753eeb16a
      Actual:   f1e5a0cc3c9f7c58f26524a43c5badc06ca0bac4
    /home/user/.local/share/FreesmLauncher/instances/1.20.1/minecraft/libraries/net/minecraft/server/1.20.1-20230612.114412/server-1.20.1-20230612.114412-extra.jar
      Expected: 13522e3278befd103064d91a199451df4cd2633f
      Actual:   eb1dafb7bee2ace5d55d90b65e73c2196b1991f3

I've tried sklauncher and freesm launcher and they throw the same error, tried installing it with the official forge installer too but same error. Also tried different versions of java: 17, 21, 24.
Forge for previous versions install fine, I'm on Linux CachyOS.

Edited April 30Apr 30 by Sens

Quote

April 30Apr 30

1. Did you try to remove your system cache or something?

2. Also check jar hash before installing (if it's ok):

sha1sum jar_name.jar > jar_name.jar.sha1
sha1sum -c jar_name.jar.sha1

Do this a few times with some interval. This can find out if your hash can be different somehow (garbage files inside).

Also try using sha224sum / sha256sum / sha384sum / sha512sum / shasum.

And do you have any debug mode during installation?

UPDATED: and it can be just fixing by chmod'ing jar file. Check its -lZ

Edited April 30Apr 30 by thuggeelya
updated

Quote

April 30Apr 30

Author

I checked the hash like you said and it came back as OK each time, also may I ask what you mean by debug mode during installation?

Quote

April 30Apr 30

Check nohup with log output

Quote

April 30Apr 30

Author

Just shows this if this is what you mean:

Data assets/minecraft/models/item/bamboo_mosaic_slab.json
Data assets/minecraft/models/item/turtle_helmet_quartz_trim.json
Processor failed, invalid outputs:
   /home/aron/.minecraft/libraries/net/minecraft/client/1.20.1-20230612.114412/client-1.20.1-20230612.114412-
slim.jar
     Expected: de86b035d2da0f78940796bb95c39a932ed84834
     Actual:   aea60124ca903ecbb2e825805e318f9d89ac867c
   /home/aron/.minecraft/libraries/net/minecraft/client/1.20.1-20230612.114412/client-1.20.1-20230612.114412-
extra.jar
     Expected: 8c5a95cbce940cfdb304376ae9fea47968d02587
     Actual:   76e87dbc119daed8dc1861c17160e0c4b6f34d2e
There was an error during installation

Also I gave the .jar file full permissions too.

Quote

April 30Apr 30

You can also try to unpack your jar. Find .../forge/fml/mc-version.cfg and ../forge/fml/conf/mcp.cfg config files. If they exist then what server_md5 value are there?

Quote

April 30Apr 30

Author

If you mean inside the installer.jar those folders and files don't exist. At least I'm not finding them.

Quote

2 months later...

July 25Jul 25

Just wondering if you managed to solve this problem?

Quote

July 28Jul 28

I have solved this problem with this Commands (Fedora):

sudo dnf install java-latest-openjdk
sudo dnf install java-latest-openjdk-develsudo

Quote

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Can't install forge for 1.20.1, hash mishmatch error. (Linux)

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