Fabric 1.17 NoClassDefFoundError on player joining server
InfoTeddy opened this issue ยท 5 comments
If the 1.17-fabric branch is installed on a server (I compiled it from source), it crashes with a NoClassDefFoundError whenever a player joins.
I can reproduce the crash with only AppleSkin and Fabric API (a required dependency) installed on the server, as shown in the following crash log:
---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3
Time: 6/18/21, 9:43 PM
Description: Exception in server tick loop
java.lang.NoClassDefFoundError: net/minecraft/class_746
at net.minecraft.class_3324.handler$zdg001$onPlayerConnect(class_3324.java:1923)
at net.minecraft.class_3324.method_14570(class_3324.java:274)
at net.minecraft.class_3248.method_33800(class_3248.java:129)
at net.minecraft.class_3248.method_14384(class_3248.java:117)
at net.minecraft.class_3248.redirect$zcn000$handlePlayerJoin(class_3248.java:563)
at net.minecraft.class_3248.method_18785(class_3248.java:67)
at net.minecraft.class_2535.method_10754(class_2535.java:234)
at net.minecraft.class_3242.method_14357(class_3242.java:183)
at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:904)
at net.minecraft.class_3176.method_3813(class_3176.java:334)
at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:833)
at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:692)
at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:274)
at java.base/java.lang.Thread.run(Thread.java:831)
Caused by: java.lang.ClassNotFoundException: net.minecraft.class_746
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:636)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:182)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
at net.fabricmc.loader.launch.server.InjectingURLClassLoader.loadClass(InjectingURLClassLoader.java:57)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:175)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
... 14 more
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- System Details --
Details:
Minecraft Version: 1.17
Minecraft Version ID: 1.17
Operating System: Linux (arm) version 5.10.17-v7l+
Java Version: 16.0.1, AdoptOpenJDK
Java VM Version: OpenJDK Server VM (mixed mode), AdoptOpenJDK
Memory: 1073315152 bytes (1023 MiB) / 1858076672 bytes (1772 MiB) up to 2147483648 bytes (2048 MiB)
CPUs: 4
Processor Vendor: armv7l
Processor Name: ARMv7 Processor rev 3 (v7l)
Identifier: armv7l Family 7 Model 0xd08 Stepping r0x0p3
Microarchitecture: unknown
Frequency (GHz): -0.00
Number of physical packages: 1
Number of physical CPUs: 1
Number of logical CPUs: 4
Graphics card #0 name: unknown
Graphics card #0 vendor: unknown
Graphics card #0 VRAM (MB): 0.00
Graphics card #0 deviceId: unknown
Graphics card #0 versionInfo: unknown
Virtual memory max (MB): 2013.63
Virtual memory used (MB): 2246.48
Swap memory total (MB): 100.00
Swap memory used (MB): 10.25
JVM Flags: 3 total; -XX:+UseG1GC -Xms512M -Xmx2G
Fabric Mods:
appleskin: AppleSkin 1.0.11
fabric: Fabric API 0.35.2+1.17
fabric-api-base: Fabric API Base 0.3.0+a02b44633d
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.1.0+1d383bb63d
fabric-biome-api-v1: Fabric Biome API (v1) 3.1.11+c345aea83d
fabric-command-api-v1: Fabric Command API (v1) 1.1.1+a02b44633d
fabric-commands-v0: Fabric Commands (v0) 0.2.2+92519afa3d
fabric-containers-v0: Fabric Containers (v0) 0.1.12+a02b44633d
fabric-content-registries-v0: Fabric Content Registries (v0) 0.2.2+a02b44633d
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.5+be9da3103d
fabric-dimensions-v1: Fabric Dimensions API (v1) 2.0.10+a02b44633d
fabric-entity-events-v1: Fabric Entity Events (v1) 1.1.0+a02b44633d
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.4.8+a02b44633d
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.1+92519afa3d
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.6+a02b44633d
fabric-item-api-v1: Fabric Item API (v1) 1.2.4+a02b44633d
fabric-item-groups-v0: Fabric Item Groups (v0) 0.2.10+b7ab61213d
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 1.4.4+a02b44633d
fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.0.4+a02b44633d
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.3+92519afa3d
fabric-networking-api-v1: Fabric Networking API (v1) 1.0.11+b7ab61213d
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.11+a02b44633d
fabric-networking-v0: Fabric Networking (v0) 0.3.2+92519afa3d
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.10.9+b7ab61213d
fabric-object-builders-v0: Fabric Object Builders (v0) 0.7.3+a02b44633d
fabric-particles-v1: Fabric Particles (v1) 0.2.4+a02b44633d
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.7.10+e2961fee3d
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.5+a02b44633d
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.4.7+b7ab61213d
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.1.8+a02b44633d
fabric-structure-api-v1: Fabric Structure API (v1) 1.1.11+e36969833d
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 1.1.4+a02b44633d
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.2.12+b7ab61213d
fabricloader: Fabric Loader 0.11.6
java: OpenJDK Server VM 16
minecraft: Minecraft 1.17
Player Count: 1 / 20; [class_3222['InfoTeddy'/204, l='ServerLevel[world]', x=127.09, y=64.00, z=362.45]]
Data Packs: vanilla (incompatible), file/bukkit (incompatible), Fabric Mods
Is Modded: Definitely; Server brand changed to 'fabric'
Type: Dedicated Server (map_server.txt)
@squeek502 I setup a server for Fabric 1.17, very strange if I repleace the PlayerManagerMixin.onPlayerConnect and ServerPlayerEntityMixin.onUpdate empty implementation it will work
Looks like ClientPlayNetworking uses @Environment(EnvType.CLIENT) meaning that when SyncHandler tries to import net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking when AppleSkin is running on the server, that class is missing.
One fix would be to separate SyncHandler into two classes:
- ClientSyncHandler
- SyncHandler
Yep, that was the issue. Fixed by f51d172