[Crash] ReflectionException: Could not find class: net.minecraft.server.network.ServerCommonPacketListenerImpl

[kangobot]

Auto-reported crash

Key	Value
Plugin	ChatControl 12.2.1
Server	Mohist 1.20.1-R0.1-SNAPSHOT
Players Online	0
BBB Nonce	00b1d4396b47ce5602c3cbfcb0ca1660
db_type	local
db_player_type	uuid
proxy_enabled	false

Context

Failed to find PlayerConnection.sendPacket()

Stack Trace

ReflectionException: Could not find class: net.minecraft.server.network.ServerCommonPacketListenerImpl
	at org.mineacademy.chatcontrol.lib.ReflectionUtil.lookupClass(ReflectionUtil.java:568)
	at org.mineacademy.chatcontrol.lib.remain.Remain.<clinit>(Remain.java:468)
	at org.mineacademy.chatcontrol.settings.Settings.init(Settings.java:1264)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
	at java.base/java.lang.reflect.Method.invoke(Method.java:565)
	at org.mineacademy.chatcontrol.lib.settings.YamlStaticConfig.invokeMethodsIn(YamlStaticConfig.java:150)
	at org.mineacademy.chatcontrol.lib.settings.YamlStaticConfig.invokeAll(YamlStaticConfig.java:128)
	at org.mineacademy.chatcontrol.lib.settings.YamlStaticConfig.invokeInitMethods(YamlStaticConfig.java:114)
	at org.mineacademy.chatcontrol.lib.settings.YamlStaticConfig.load(YamlStaticConfig.java:67)
	at org.mineacademy.chatcontrol.lib.platform.AutoRegisterScanner.registerSettings(AutoRegisterScanner.java:236)
	at org.mineacademy.chatcontrol.lib.platform.AutoRegisterScanner.scanAndRegister(AutoRegisterScanner.java:93)
	at org.mineacademy.chatcontrol.lib.platform.BukkitPlugin.onEnable(BukkitPlugin.java:387)
	at TRANSFORMER/forge@47.4.13/org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:348)
	at TRANSFORMER/forge@47.4.13/org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:338)
	at TRANSFORMER/forge@47.4.13/org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:484)
	at TRANSFORMER/forge@47.4.13/org.bukkit.craftbukkit.v1_20_R1.CraftServer.enablePlugin(CraftServer.java:552)
	at TRANSFORMER/forge@47.4.13/org.bukkit.craftbukkit.v1_20_R1.CraftServer.enablePlugins(CraftServer.java:466)
	at TRANSFORMER/minecraft@1.20.1/net.minecraft.server.MinecraftServer.m_129815_(MinecraftServer.java:457)
	at TRANSFORMER/minecraft@1.20.1/net.minecraft.server.MinecraftServer.m_130006_(MinecraftServer.java:352)
	at TRANSFORMER/minecraft@1.20.1/net.minecraft.server.dedicated.DedicatedServer.m_7038_(DedicatedServer.java:235)
	at TRANSFORMER/minecraft@1.20.1/net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:815)
	at TRANSFORMER/minecraft@1.20.1/net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:286)
	at java.base/java.lang.Thread.run(Thread.java:1474)

[kangarko]

This comes from Mohist 1.20.1 keeping Mojang class names with SRG member names, which made our reflection take the wrong branch: ServerCommonPacketListenerImpl only exists since 1.20.2. Not a crash, the plugin enabled fine, but the lookup failure was wrongly auto-reported.

Next release resolves send(Packet) through ServerGamePacketListenerImpl with an SRG fallback (m_9829_) so packets actually work on Forge hybrids, and Forge/NeoForge platforms no longer file these reports. Note that hybrids remain officially unsupported, but this particular noise is gone.

[kangarko]

Fixed in 12.2.2. The missing class no longer breaks startup on Mohist and other Forge hybrids.