tanyan

Update: He was able to join at last, but later started getting timed out. He was able to join and walk around for a couple seconds and then he got disconnected. Today, we switched the host back to me and he was able to join but now I can't join at all, and the console log suggests immersive engineering had an issue with some MineralArguments which was already reported to IE's issue tracker and fixed. The error is the same as what my friend would constantly get. I'm beginning to think it's too early for 1.16.1 Forge, which is sad but understandable as I hear it's in beta. We will probably give up trying to host this server as we've had all of those issues for several days in a row. Thanks for the help so far.

FOUND THE PROBLEM! Ever since my last post, I began getting the error my friend was getting, so per your suggestion I removed voxelmap from my client and it worked like a charm. Tried both disconnecting and rejoining, restarting the game, etc, and I was able to join the server every time. The second I added voxelmap back, that same issue came back on first attempt to join the server, so my assumption for now is voxelmap is the culprit. My friend is currently asleep so I will update the thread tomorrow when we have a conclusion, but it looks like this might actually be it. Thanks for the help!

Is your batch file running the vanilla jar rather than the forge jar? It needs a forge jar in order to run the mods. From your batch, it looks like you might be running the vanilla jar. java -server -Dfml.readTimeout=600 -Xms512M -Xmx5G -jar forge-1.16.1-32.0.106.jar nogui pause The above is what I use to make sure my server loads as forge, as you can tell it mentions the forge file. (Please don't actually copy this as it might not be favorable, but check the content) Here is how my server folder looks like, to give you a better idea:

Hi! We went through our mod list and we realized the FastLeafDecay was in the mod folder unnecessarily, as it's a server-side mod. We removed that first and then we removed Hwyla. - After removing Hwyla from just the server, both me and friend C were able to join, although we didn't delete Hwyla from our clients. I was able to rejoin after disconnecting and connecting again. - After friend B removed Hwyla from his client, he was able to join the server. He was also able to rejoin after disconnecting and connecting again. Unfortunately, after closing the game and loading it again, he went back to square one. Here's the server console log: ←[m←[32m[22:28:35] [User Authenticator #12/INFO] [minecraft/ServerLoginNetHandler]: UUID of player Dinges360 is c975d473-4e1d-40ab-995e-2ae6079f7553 ←[m←[32m[22:28:56] [Server thread/INFO] [ne.mi.co.AdvancementLoadFix/]: Using new advancement loading for net.minecraft.advancements.PlayerAdvancements@76e44133 ←[m←[32m[22:28:56] [Server thread/INFO] [minecraft/PlayerList]: Dinges360[/IP] logged in with entity id 11271 at (-1126.7410381386183, 75.875, -2602.6539308288798) ←[m←[32m[22:28:56] [Server thread/INFO] [minecraft/DedicatedServer]: Dinges360 joined the game ←[m←[1;31m[22:28:56] [Netty Server IO #7/ERROR] [minecraft/ArgumentTypes]: Could not serialize net.minecraftforge.server.command.ModIdArgument@2da9e1bf (class net.minecraftforge.server.command.ModIdArgument) - will not be sent to client! ←[m←[1;31m[22:28:56] [Netty Server IO #7/ERROR] [minecraft/ArgumentTypes]: Could not serialize net.minecraftforge.server.command.EnumArgument@594d30f3 (class net.minecraftforge.server.command.EnumArgument) - will not be sent to client! ←[m←[32m[22:28:58] [Server thread/INFO] [STDERR/]: [com.mamiyaotaru.voxelmap.forgemod.WorldIDPacket:decode:45]: Failed to read message: java.lang.IndexOutOfBoundsException: readerIndex(2) + length(42) exceeds writerIndex(3): PooledUnsafeDirectByteBuf(ridx: 2, widx: 3, cap: 3) ←[m←[32m[22:29:02] [Server thread/INFO] [minecraft/ServerPlayNetHandler]: Dinges360 lost connection: Disconnected ←[m←[32m[22:29:02] [Server thread/INFO] [minecraft/DedicatedServer]: Dinges360 left the game

←[m←[32m[19:31:17] [Server thread/INFO] [minecraft/PlayerList]: Dinges360[/IP] logged in with entity id 1837 at (-1135.3784178540054, 72.0, -2633.0494509492055) ←[m←[32m[19:31:17] [Server thread/INFO] [minecraft/DedicatedServer]: Dinges360 joined the game ←[m←[32m[19:31:17] [Server thread/INFO] [Waila/]: Syncing config to Dinges360 (c975d473-4e1d-40ab-995e-2ae6079f7553) ←[m←[1;31m[19:31:17] [Netty Server IO #6/ERROR] [minecraft/ArgumentTypes]: Could not serialize net.minecraftforge.server.command.ModIdArgument@231aeeac (class net.minecraftforge.server.command.ModIdArgument) - will not be sent to client! ←[m←[1;31m[19:31:17] [Netty Server IO #6/ERROR] [minecraft/ArgumentTypes]: Could not serialize net.minecraftforge.server.command.EnumArgument@45ee85c3 (class net.minecraftforge.server.command.EnumArgument) - will not be sent to client! ←[m←[32m[19:31:22] [Server thread/INFO] [minecraft/ServerPlayNetHandler]: Dinges360 lost connection: Disconnected ←[m←[32m[19:31:22] [Server thread/INFO] [minecraft/DedicatedServer]: Dinges360 left the game Our server host found the log in the console which happens at the exact moment friend B got the error, is this useful at all?

https://cdn.discordapp.com/attachments/741332057082560623/741345637815025674/debug.log

Nope. As soon as I got the error again, I went to the logs folder and found that the latest.log was updated, and then I didn't touch anything else. https://pastebin.com/Gi8rbgFs

Several times. Still the same result.

Those files are the only ones that were updated around the time of joining the server. I don't know what else I can upload

Server Background: Forge Version 106 for 1.16.1 Mod list: Image Mod zip: https://cdn.discordapp.com/attachments/741332057082560623/741332263798702140/Modpack_mods.zip Problem: I am trying to connect to a 1.16.1 Forge server with mods and instead of joining, I am stuck on loading screen which dims slightly and then shows the following error: Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(23) + length(8) exceeds writerIndex(23): PooledUnsafeDirectByteBuf(ridx:23, widx: 23, cap:23) Another friend of mine is also getting this error but with different values: Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(116) + length(8) exceeds writerIndex(122): PooledUnsafeDirectByteBuf(ridx:116, widx: 122, cap:122) Extra Information: The error doesn't occur every time but we don't know what causes it to go away either. We have 3 players on the server - me, player B (the one with the above error) and player C. Beforehand, I was the one hosting the server but C always timed out, so I transferred the files over to him and he was able to host it just fine yesterday. To note, before I did the file transfer, B was also having issues with joining my server and we were under the impression it was to do with someone's data not being sent quickly enough or something like that. After being able to play just fine yesterday with C as the server host, neither me or B are able to join the server today, as we get the above errors. Even when I was hosting the server, I would occasionally get that error when attempting to join, but I was able to reconnect afterwards, through both the external IP and local address. B's error is persistent and game restart has no effect. My logs: debug.log: https://cdn.discordapp.com/attachments/741332057082560623/741336535080632351/debug.log latest.log: https://pastebin.com/59mL11G6