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Vanilla 1.21.11 Network Protocol Error Report

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Detected
Minecraft version: 1.21.11 Java version: 21.0.7
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---- Minecraft Network Protocol Error Report ----
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// Sabotage!
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Time: 2026-02-20 22:45:49
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Description: Packet handling error
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java.net.SocketException: Connection reset
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at java.base/sun.nio.ch.SocketChannelImpl.throwConnectionReset(SocketChannelImpl.java:401)
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at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:434)
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at io.netty.buffer.AdaptivePoolingAllocator$AdaptiveByteBuf.setBytes(AdaptivePoolingAllocator.java:1824)
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at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1139)
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at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
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at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:153)
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at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.handle(AbstractNioChannel.java:445)
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at io.netty.channel.nio.NioIoHandler$DefaultNioRegistration.handle(NioIoHandler.java:388)
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at io.netty.channel.nio.NioIoHandler.processSelectedKey(NioIoHandler.java:596)
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at io.netty.channel.nio.NioIoHandler.processSelectedKeysOptimized(NioIoHandler.java:571)
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at io.netty.channel.nio.NioIoHandler.processSelectedKeys(NioIoHandler.java:512)
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at io.netty.channel.nio.NioIoHandler.run(NioIoHandler.java:484)
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at io.netty.channel.SingleThreadIoEventLoop.runIo(SingleThreadIoEventLoop.java:225)
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at io.netty.channel.SingleThreadIoEventLoop.run(SingleThreadIoEventLoop.java:196)
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at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:1193)
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at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
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at java.base/java.lang.Thread.run(Thread.java:1583)
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A detailed walkthrough of the error, its code path and all known details is as follows:
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---------------------------------------------------------------------------------------
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-- Head --
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Thread: Netty NIO IO #4
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Stacktrace:
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at net.minecraft.network.PacketListener.fillCrashReport(SourceFile:33)
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-- Connection --
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Details:
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Protocol: play
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Flow: CLIENTBOUND
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Is Local: false
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Server type: OTHER
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Server brand: Spigot
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Stacktrace:
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at net.minecraft.network.PacketListener.fillCrashReport(SourceFile:33)
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at net.minecraft.network.protocol.PacketUtils.fillCrashReport(SourceFile:47)
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at net.minecraft.client.multiplayer.ClientCommonPacketListenerImpl.storeDisconnectionReport(SourceFile:146)
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at net.minecraft.client.multiplayer.ClientCommonPacketListenerImpl.createDisconnectionInfo(SourceFile:137)
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at net.minecraft.network.Connection.exceptionCaught(SourceFile:134)
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at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:289)
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at io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:271)
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at io.netty.channel.DefaultChannelPipeline$HeadContext.exceptionCaught(DefaultChannelPipeline.java:1396)
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at io.netty.channel.DefaultChannelPipeline.fireExceptionCaught(DefaultChannelPipeline.java:890)
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at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.handleReadException(AbstractNioByteChannel.java:127)
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at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:179)
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at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.handle(AbstractNioChannel.java:445)
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at io.netty.channel.nio.NioIoHandler$DefaultNioRegistration.handle(NioIoHandler.java:388)
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at io.netty.channel.nio.NioIoHandler.processSelectedKey(NioIoHandler.java:596)
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at io.netty.channel.nio.NioIoHandler.processSelectedKeysOptimized(NioIoHandler.java:571)
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at io.netty.channel.nio.NioIoHandler.processSelectedKeys(NioIoHandler.java:512)
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at io.netty.channel.nio.NioIoHandler.run(NioIoHandler.java:484)
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at io.netty.channel.SingleThreadIoEventLoop.runIo(SingleThreadIoEventLoop.java:225)
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at io.netty.channel.SingleThreadIoEventLoop.run(SingleThreadIoEventLoop.java:196)
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at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:1193)
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at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
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at java.base/java.lang.Thread.run(Thread.java:1583)
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-- System Details --
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Details:
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Minecraft Version: 1.21.11
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Minecraft Version ID: 1.21.11
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Operating System: Windows 11 (amd64) version 10.0
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Java Version: 21.0.7, Microsoft
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Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
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Memory: 284652904 bytes (271 MiB) / 671088640 bytes (640 MiB) up to 2147483648 bytes (2048 MiB)
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CPUs: 16
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Processor Vendor: AuthenticAMD
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Processor Name: AMD Ryzen 7 7700X 8-Core Processor
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Identifier: AuthenticAMD Family 25 Model 97 Stepping 2
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Microarchitecture: Zen 3
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Frequency (GHz): 4.49
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Number of physical packages: 1
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Number of physical CPUs: 8
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Number of logical CPUs: 16
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Graphics card #0 name: AMD Radeon RX 7900 XT
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Graphics card #0 vendor: Advanced Micro Devices, Inc.
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Graphics card #0 VRAM (MiB): 20464.00
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Graphics card #0 deviceId: VideoController1
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Graphics card #0 versionInfo: 32.0.23017.1001
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Graphics card #1 name: AMD Radeon(TM) Graphics
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Graphics card #1 vendor: Advanced Micro Devices, Inc.
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Graphics card #1 VRAM (MiB): 512.00
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Graphics card #1 deviceId: VideoController2
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Graphics card #1 versionInfo: 32.0.21041.1000
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Memory slot #0 capacity (MiB): 16384.00
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Memory slot #0 clockSpeed (GHz): 6.00
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Memory slot #0 type: DDR5
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Memory slot #1 capacity (MiB): 16384.00
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Memory slot #1 clockSpeed (GHz): 6.00
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Memory slot #1 type: DDR5
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Virtual memory max (MiB): 33942.82
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Virtual memory used (MiB): 18191.71
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Swap memory total (MiB): 2048.00
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Swap memory used (MiB): 0.00
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Space in storage for jna.tmpdir (MiB): available: 352689.25, total: 952949.00
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Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): available: 352689.25, total: 952949.00
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Space in storage for io.netty.native.workdir (MiB): available: 352689.25, total: 952949.00
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Space in storage for java.io.tmpdir (MiB): available: 352689.25, total: 952949.00
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Space in storage for workdir (MiB): available: 352689.25, total: 952949.00
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JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
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Debug Flags: 0 total;
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mclo.gs
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