Expected Behavior

There should be no errors.

Actual Behavior

Logs are spammed with the same error thousands of times

Reproduction Steps

1. Log onto a server, the one I was on was Paper 1.12.2 with Viaversion
2. Stand near a mob spawner, specifically I was standing near an Iron Golem Spawner, may also be caused by zombie_pigman as it was in the logs a few times.
3. Look in logs for errors

Attachments

[20:34:21] [main/WARN]: Skipping Entity with id minecraft:zombie_pigman [20:34:21] [main/WARN]: Exception loading entity: net.minecraft.class_148: Loading entity NBT at net.minecraft.class_1297.method_5651(class_1297.java:1645) ~[intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_1299.method_17839(class_1299.java:468) ~[intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_1299$$Lambda$3502/1297726039.accept(Unknown Source) ~[?:?] at net.minecraft.class_156.method_17974(class_156.java:401) ~[intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_1299.method_5892(class_1299.java:467) ~[intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_1299.method_17848(class_1299.java:530) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_1299.method_17842(class_1299.java:511) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_1917.method_8283(class_1917.java:256) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_839.method_3589(class_839.java:22) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_839.method_3569(class_839.java:12) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_824.method_23079(class_824.java:107) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_824.method_23081(class_824.java:96) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_824$$Lambda$3489/1478363267.run(Unknown Source) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_824.method_3554(class_824.java:128) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_824.method_3555(class_824.java:96) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at me.jellysquid.mods.sodium.client.render.SodiumWorldRenderer.renderTileEntities(SodiumWorldRenderer.java:302) [sodium-fabric-mc1.16.1-0.1.0.jar:?] at net.minecraft.class_761.handler$zck000$onRenderTileEntities(class_761.java:3192) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_761.method_22710(class_761.java:1245) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_757.method_3188(class_757.java:717) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_757.method_3192(class_757.java:540) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_310.method_1523(class_310.java:1021) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_310.method_1514(class_310.java:654) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.client.main.Main.main(Main.java:215) [intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:192) [fabric-loader-0.9.2+build.206.jar:?] at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:140) [fabric-loader-0.9.2+build.206.jar:?] at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26) [fabric-loader-0.9.2+build.206.jar:?] Caused by: java.lang.ClassCastException: net.minecraft.class_638 cannot be cast to net.minecraft.class_3218 at net.minecraft.class_1439.method_5749(class_1439.java:170) ~[intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] at net.minecraft.class_1297.method_5651(class_1297.java:1636) ~[intermediary-fabric-loader-0.9.2+build.206-1.16.1.jar:?] ... 29 more

System Information

• Java Version: 1.8.0_251-b08
• CPU: Intel Core i5-8400
• GPU: NVIDIA GeForce RTX 2060

I can reproduce this (and other people are reporting this) without Sodium installed, just on a Vanilla client. For example PaperMC/Paper/issues/1069

ViaVersion should not be sending the entity ID minecraft:zombie_pigman to a 1.16.x client, as it no longer exists in 1.16.x. This is something that I believe needs to be fixed by the server you are on.

As an alternative, you could look into using multiconnect on your client, which actually takes the time to handle incompatibilities between versions. This may fix your issue