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io.netty.handler.codec.DecoderException with a Forge server

See original GitHub issue

Describe the bug I can’t join a Forge server running without any mod:

Leeo97one has disconnected from remote java server on address 127.0.0.1 because of io.netty.handler.codec.DecoderException: java.lang.IllegalArgumentException: Value minecraft: has no mapping for key class com.github.steveice10.mc.protocol.data.game.command.CommandParser.

To Reproduce Steps to reproduce the behavior:

Run a Forge server without any mod
Connect via Geyser
See error

Expected behavior Successful connection.

Screenshots Screenshot_20200328-120519

Server version forge-1.15.2-31.1.0-universal

Geyser version Revision: 03e11df58beafbc91b414f8e50a020a76e8e2e7c

Bedrock version 1.14.30

Additional context No mods.

Issue Analytics

State:
Created 3 years ago
Comments:12 (6 by maintainers)

Top GitHub Comments

2reactions

Redned235commented, Mar 28, 2020

Ideally, Geyser should be able to join Forge and Fabric servers that don’t require the client to have any mods without any problems. Likely what is happening is the Forge server is sending a packet that Geyser does not recognize, thus causing them to be kicked. On a normal Notchian client, the packet is ignored.

1reaction

Camotoycommented, Apr 15, 2020

This should be fixed next build, when the MCProtocolLib changes can register.