Disconnection with use-alternative-keepalive: true

colterfink commented 4 months ago

Spark link

https://spark.lucko.me/7c0ommaBi4

Expected behavior

Connect to the server.

Observed/Actual behavior

Logging in... > Encrypting... > Joining World... > Disconnected

Error in console:

lost connection: Internal Exception: io.netty.handler.codec.EncoderException: Pipeline has no outbound protocol configured, can't process packet net.minecraft.network.protocol.common.ClientboundKeepAlivePacket@74d01eb2

Steps/models to reproduce

Install latest Purpur 1.20.6 build
Set use-alternative-keepalive: true
Attempt to connect

Purpur version

[11:25:49 INFO]: Checking version, please wait...
[11:25:49 INFO]: Current Purpur Version: 1.20.6-2227-79d199c (MC: 1.20.6)*
* You are running the latest version
Previous: 1.20.6-134-4f13be9 (MC: 1.20.6)

Agreements

[X] I am running the latest version of Purpur available from https://purpurmc.org/downloads.
[X] I have searched for and ensured there isn't already an open issue regarding this.
[ ] I ticked all the boxes without actually reading them
[X] My version of Minecraft is supported by Purpur.

Other

No response

Krakenied commented 4 months ago

com.mojang.authlib.GameProfile@7e51ef41[...] lost connection: Internal Exception: io.netty.handler.codec.EncoderException: Pipeline has no outbound protocol configured, can't process packet net.minecraft.network.protocol.common.ClientboundKeepAlivePacket@5142fd68

It happened only once to me (my use-alternative-keepalive is enabled). Not that easy to reproduce so I can't test if it's its fault.

edit: There are no reports for this error on both PaperMC Discord server and Paper GitHub issues and there are at least 3-4 reports on Purpur so probably we can assume it's a Purpur thing

colterfink commented 4 months ago

Perhaps I'm more susceptible to encountering the issue due to a poor baseline ping ranging between 200-250, as I'm from Australia. One of my American moderators reportedly only got disconnected once, while another from Europe couldn't login at all.

Yep, switched to Paper initially to get my server online ASAP and spent more time later determining it was alt-keepalive :)

PurpurMC / Purpur