---- Minecraft Network Protocol Error Report ----
Time: 2026-09-23 17:58:27
Description: Packet handling error
io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:map_item_data'
at knot//net.minecraft.class_9136.method_56425(class_9136.java:38)
at knot//net.minecraft.class_9136.decode(class_9136.java:14)
at knot//net.minecraft.class_2543.decode(class_2543.java:31)
at knot//io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529)
at knot//io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468)
at knot//io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.handler.flow.FlowControlHandler.dequeue(FlowControlHandler.java:202)
at knot//io.netty.handler.flow.FlowControlHandler.channelRead(FlowControlHandler.java:164)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
at knot//io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
at knot//io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:333)
at knot//io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:454)
at knot//io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at knot//io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at knot//io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
at knot//io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
at knot//io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
at knot//io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
at knot//io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at knot//io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(16402) + length(1) exceeds writerIndex(16402): PooledUnsafeDirectByteBuf(ridx: 16402, widx: 16402, cap: 16402)
at knot//io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1442)
at knot//io.netty.buffer.AbstractByteBuf.readByte(AbstractByteBuf.java:730)
at knot//io.netty.buffer.AbstractByteBuf.readBoolean(AbstractByteBuf.java:739)
at knot//net.minecraft.class_2540.readBoolean(class_2540.java:1167)
at knot//net.minecraft.class_9135$10.method_56415(class_9135.java:325)
at knot//net.minecraft.class_9135$10.decode(class_9135.java:322)
at knot//net.minecraft.class_9139$4.decode(class_9139.java:256)
at knot//net.minecraft.class_9139$9.method_56441(class_9139.java:91)
at knot//net.minecraft.class_9139$9.decode(class_9139.java:87)
at knot//net.minecraft.class_9136.method_56425(class_9136.java:36)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
Thread: Netty Client IO #1
at knot//net.minecraft.class_2547.method_55622(class_2547.java:33)
at knot//net.minecraft.class_2547.method_55622(class_2547.java:33)
at knot//net.minecraft.class_2600.method_59803(class_2600.java:62)
at knot//net.minecraft.class_8673.method_60882(class_8673.java:136)
at knot//net.minecraft.class_8673.method_60881(class_8673.java:127)
at knot//net.minecraft.class_2535.exceptionCaught(class_2535.java:161)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:346)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:325)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:317)
at knot//io.netty.channel.ChannelInboundHandlerAdapter.exceptionCaught(ChannelInboundHandlerAdapter.java:143)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:346)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:447)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.handler.flow.FlowControlHandler.dequeue(FlowControlHandler.java:202)
at knot//io.netty.handler.flow.FlowControlHandler.channelRead(FlowControlHandler.java:164)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
at knot//io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
at knot//io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:333)
at knot//io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:454)
at knot//io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at knot//io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
at knot//io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at knot//io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at knot//io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at knot//io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
at knot//io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
at knot//io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
at knot//io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
at knot//io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at knot//io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base/java.lang.Thread.run(Thread.java:1583)
Minecraft Version: 1.21.1
Minecraft Version ID: 1.21.1
Operating System: Windows 10 (amd64) version 10.0
Java Version: 21.0.7, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 126967136 bytes (121 MiB) / 819986432 bytes (782 MiB) up to 4294967296 bytes (4096 MiB)
Processor Vendor: AuthenticAMD
Processor Name: AMD Ryzen 5 PRO 4650G with Radeon Graphics
Identifier: AuthenticAMD Family 23 Model 96 Stepping 1
Microarchitecture: unknown
Number of physical packages: 1
Number of physical CPUs: 6
Number of logical CPUs: 12
Graphics card #0 name: AMD Radeon(TM) Graphics
Graphics card #0 vendor: Advanced Micro Devices, Inc.
Graphics card #0 VRAM (MiB): 512.00
Graphics card #0 deviceId: VideoController1
Graphics card #0 versionInfo: 31.0.21921.1000
Memory slot #0 capacity (MiB): 8192.00
Memory slot #0 clockSpeed (GHz): 2.13
Memory slot #0 type: DDR4
Memory slot #1 capacity (MiB): 8192.00
Memory slot #1 clockSpeed (GHz): 2.13
Memory slot #1 type: DDR4
Virtual memory max (MiB): 20129.64
Virtual memory used (MiB): 16313.03
Swap memory total (MiB): 4352.00
Swap memory used (MiB): 430.74
Space in storage for jna.tmpdir (MiB): <path not set>
Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): <path not set>
Space in storage for io.netty.native.workdir (MiB): <path not set>
Space in storage for java.io.tmpdir (MiB): available: 61418.86, total: 457164.56
Space in storage for workdir (MiB): available: 61418.86, total: 457164.56
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms512m -Xmx4096m
ambientsounds: AmbientSounds 6.3.8
appleskin: AppleSkin 3.0.6+mc1.21
betterdeserttemples: YUNG's Better Desert Temples 1.21.1-Fabric-4.1.5
betterdungeons: YUNG's Better Dungeons 1.21.1-Fabric-5.1.4
betterendisland: YUNG's Better End Island 1.21.1-Fabric-3.1.2
betterwitchhuts: YUNG's Better Witch Huts 1.21.1-Fabric-4.1.1
cicada: CICADA 0.14.3+1.21-1.21.1
org_yaml_snakeyaml: snakeyaml 2.2
cloth-config: Cloth Config v15 15.0.140
cloth-basic-math: cloth-basic-math 0.6.1
creativecore: CreativeCore 2.13.48
net_neoforged_bus: bus 7.2.0
do_a_barrel_roll: Do a Barrel Roll 3.7.3
mixinsquared: MixinSquared 0.1.2-beta.4
eatinganimationid: Eating Animation 1.21+1.9.72
entityculling: EntityCulling 1.11.2
transition: TRansition 1.0.25
explorify: Explorify 1.6.5
fabric-api: Fabric API 0.116.17+1.21.1
fabric-api-base: Fabric API Base 0.4.42+6573ed8c19
fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.72+7b3d111d19
fabric-biome-api-v1: Fabric Biome API (v1) 13.0.31+d527f9fd19
fabric-block-api-v1: Fabric Block API (v1) 1.1.0+0bc3503219
fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.11+ebb2264e19
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.52+0af3f5a719
fabric-client-tags-api-v1: Fabric Client Tags 1.2.0+1eb36c0719
fabric-command-api-v1: Fabric Command API (v1) 1.2.49+f71b366f19
fabric-command-api-v2: Fabric Command API (v2) 2.2.28+6ced4dd919
fabric-commands-v0: Fabric Commands (v0) 0.2.66+df3654b319
fabric-content-registries-v0: Fabric Content Registries (v0) 8.0.19+b559734419
fabric-convention-tags-v1: Fabric Convention Tags 2.1.7+7f945d5b19
fabric-convention-tags-v2: Fabric Convention Tags (v2) 2.12.0+c3656daa19
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.2.29+0af3f5a719
fabric-data-attachment-api-v1: Fabric Data Attachment API (v1) 1.4.7+5b36e0f719
fabric-data-generation-api-v1: Fabric Data Generation API (v1) 20.3.0+1eb36c0719
fabric-dimensions-v1: Fabric Dimensions API (v1) 4.0.1+65213ef819
fabric-entity-events-v1: Fabric Entity Events (v1) 1.8.0+2b27e0a419
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.7.14+ba9dae0619
fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.53+6ced4dd919
fabric-item-api-v1: Fabric Item API (v1) 11.3.0+467044f319
fabric-item-group-api-v1: Fabric Item Group API (v1) 4.1.7+def88e3a19
fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.0.47+0af3f5a719
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.2.45+df3654b319
fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.6.0+0865547519
fabric-loot-api-v2: Fabric Loot API (v2) 3.0.15+3f89f5a519
fabric-loot-api-v3: Fabric Loot API (v3) 1.0.3+3f89f5a519
fabric-message-api-v1: Fabric Message API (v1) 6.0.14+8aaf3aca19
fabric-model-loading-api-v1: Fabric Model Loading API (v1) 2.1.0+b4d813fc19
fabric-networking-api-v1: Fabric Networking API (v1) 4.3.1+d30f6a7919
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 15.2.1+40875a9319
fabric-particles-v1: Fabric Particles (v1) 4.0.2+6573ed8c19
fabric-recipe-api-v1: Fabric Recipe API (v1) 5.0.16+2475392c19
fabric-registry-sync-v0: Fabric Registry Sync (v0) 5.3.2+e3eddc2119
fabric-renderer-api-v1: Fabric Renderer API (v1) 3.4.1+b4d813fc19
fabric-renderer-indigo: Fabric Renderer - Indigo 1.7.1+c705a49c19
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 3.2.71+df3654b319
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.49+73761d2e19
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.1.6+1daea21519
fabric-rendering-v0: Fabric Rendering (v0) 1.1.74+df3654b319
fabric-rendering-v1: Fabric Rendering (v1) 5.2.1+f44c2eea19
fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 4.3.0+8dc279b119
fabric-resource-loader-v0: Fabric Resource Loader (v0) 1.3.1+5b5275af19
fabric-screen-api-v1: Fabric Screen API (v1) 2.0.26+639b4c0719
fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.91+b559734419
fabric-sound-api-v1: Fabric Sound API (v1) 1.0.23+6573ed8c19
fabric-tag-api-v1: Fabric Tag API (v1) 1.3.0+1eb36c0719
fabric-transfer-api-v1: Fabric Transfer API (v1) 5.4.4+7b3d111d19
fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 6.2.0+45b9699719
fabric-language-kotlin: Fabric Language Kotlin 1.14.1+kotlin.2.4.20
org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 2.4.20
org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 2.4.20
org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 2.4.20
org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 2.4.20
org_jetbrains_kotlinx_atomicfu-jvm: atomicfu-jvm 0.33.0
org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.11.0
org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.11.0
org_jetbrains_kotlinx_kotlinx-datetime-jvm: kotlinx-datetime-jvm 0.8.0
org_jetbrains_kotlinx_kotlinx-io-bytestring-jvm: kotlinx-io-bytestring-jvm 0.9.1
org_jetbrains_kotlinx_kotlinx-io-core-jvm: kotlinx-io-core-jvm 0.9.1
org_jetbrains_kotlinx_kotlinx-serialization-cbor-jvm: kotlinx-serialization-cbor-jvm 1.11.0
org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.11.0
org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.11.0
fabricloader: Fabric Loader 0.19.5
mixinextras: MixinExtras 0.5.5
fallingleaves: Falling Leaves 1.17.1
ferritecore: FerriteCore 7.0.3
fzzy_config: Fzzy Config 0.7.7+1.21
blue_endless_jankson: jankson 1.2.3
fabric-permissions-api-v0: fabric-permissions-api 0.3.1
net_peanuuutz_tomlkt_tomlkt-jvm: tomlkt-jvm 0.3.7
immediatelyfast: ImmediatelyFast 1.6.14+1.21.1
net_lenni0451_reflect: Reflect 1.6.2
immersive_paintings: Immersive Paintings 0.7.9
com_twelvemonkeys_common_common-image: common-image 3.12.0
com_twelvemonkeys_common_common-lang: common-lang 3.12.0
com_twelvemonkeys_imageio_imageio-core: imageio-core 3.12.0
com_twelvemonkeys_imageio_imageio-webp: imageio-webp 3.12.0
incapacitated: Incapacitated 2.0.1
cardinal-components-base: Cardinal Components API (base) 6.1.1
cardinal-components-entity: Cardinal Components API (entities) 6.1.1
iris: Iris 1.8.14-beta.1+mc1.21.1
io_github_douira_glsl-transformer: glsl-transformer 3.0.0-pre3
org_anarres_jcpp: jcpp 1.4.14
org_antlr_antlr4-runtime: antlr4-runtime 4.13.1
java: OpenJDK 64-Bit Server VM 21
jei: Just Enough Items **.**.**.**
lithostitched: Lithostitched 1.8.0
de_marhali_json5-java: json5-java 3.0.0
map_atlases: Map Atlases 1.21-6.7.3
minecraft: Minecraft 1.21.1
moonlight: Moonlight Lib 1.21.1-3.6.8
codecui: CodecUI 1.21.1-1.4.5
mr_tidal_towns: Tidal Towns 2.0
notenoughanimations: NotEnoughAnimations 1.12.6
nullscape: Nullscape 1.2.14
nyfsspiders: Nyf's Spiders 3.0.1
awcapi: Advanced Wall Climber API 1.0.2
forgeconfigapiport: Forge Config API Port 21.1.0
com_electronwill_night-config_core: core 3.8.0
com_electronwill_night-config_toml: toml 3.8.0
obsidianui: ObsidianUI 0.2.9+mc1.21.1
philipsruins: Philip`s Ruins 1.21.1
placeholder-api: Placeholder API 2.4.2+1.21
presencefootsteps: Presence Footsteps 1.11.2+1.21
kirin: Kirin UI 1.20.0+1.21
ryoamiclights: RyoamicLights 0.2.11+mc1.21.1
sodium: Sodium 0.8.13+mc1.21.1
sound_physics_remastered: Sound Physics Remastered 1.21.1-1.4.10
supplementaries: Supplementaries 1.21.1-3.9.9
sablecompanion: Sable Companion 1.6.0
terralith: Terralith 2.6.2
visuality: Visuality 0.7.7+1.21
voicechat: Simple Voice Chat 1.21.1-2.6.22
voicechat_api: Simple Voice Chat API 2.6.20
yungsapi: YUNG's API 1.21.1-Fabric-5.1.9
org_javassist_javassist: javassist 3.29.2-GA
org_reflections_reflections: reflections 0.10.2