Server crashes randomly on a player join

[AchalS-iglu]

Server crashes randomly on a player join

`---- Minecraft Crash Report ---- // Daisy, daisy...

Time: 2023-06-30 21:44:38 Description: Exception in server tick loop

java.lang.NullPointerException: Cannot read field "next" because "this.next" is null at java.base/java.util.LinkedList$ListItr.next(LinkedList.java:897) at com.fibermc.essentialcommands.playerdata.PlayerDataManager.tick(PlayerDataManager.java:132) at com.fibermc.essentialcommands.playerdata.PlayerDataManager.lambda$init$0(PlayerDataManager.java:59) at net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.lambda$static$2(ServerTickEvents.java:43) at net.minecraft.server.MinecraftServer.handler$zfj000$fabric-lifecycle-events-v1$onEndTick(MinecraftServer.java:3362) at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:847) at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:671) at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:265) at java.base/java.lang.Thread.run(Thread.java:833)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- System Details -- Details: Minecraft Version: 1.20.1 Minecraft Version ID: 1.20.1 Operating System: Linux (amd64) version 5.10.0-21-amd64 Java Version: 17.0.7, Eclipse Adoptium Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Eclipse Adoptium Memory: 2545320624 bytes (2427 MiB) / 4294967296 bytes (4096 MiB) up to 4294967296 bytes (4096 MiB) CPUs: 2 Processor Vendor: GenuineIntel Processor Name: Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz Identifier: Intel64 Family 6 Model 158 Stepping 13 Microarchitecture: Coffee Lake Frequency (GHz): 3.60 Number of physical packages: 1 Number of physical CPUs: 8 Number of logical CPUs: 16 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): 105296.58 Virtual memory used (MB): 142414.16 Swap memory total (MB): 40927.00 Swap memory used (MB): 22460.33 JVM Flags: 2 total; -Xms128M -Xmx4096M Fabric Mods: chunkpregen: Fabric Chunk Pregenerator 0.3.3 colorfulanvils: Colorful Anvils 1.2.0+1.20.x fabric-api-base: Fabric API Base 0.4.29+b04edc7a77 fabric-permissions-api-v0: fabric-permissions-api 0.2-SNAPSHOT placeholder-api: Placeholder API 2.1.1+1.20 craterlib: CraterLib 1.0.1 deathlog: DeathLog 0.3.2+1.20 easyauth: Easy Authentication Mod 3.0.0-17 at_favre_lib_bcrypt: bcrypt 0.9.0 at_favre_lib_bytes: bytes 1.5.0 com_mysql_mysql-connector-j: mysql-connector-j 8.0.33 de_mkammerer_argon2-jvm: argon2-jvm 2.11 de_mkammerer_argon2-jvm-nolibs: argon2-jvm-nolibs 2.11 net_java_dev_jna_jna: jna 5.12.1 org_iq80_leveldb_leveldb: leveldb 0.12 org_iq80_leveldb_leveldb-api: leveldb-api 0.12 org_mongodb_bson: bson 4.7.2 org_mongodb_mongodb-driver-core: mongodb-driver-core 4.7.2 org_mongodb_mongodb-driver-sync: mongodb-driver-sync 4.7.2 server_translations_api: Server Translations API 2.0.0+1.20 packet_tweaker: Packet Tweaker 0.4.0+1.19.4 essential_commands: Essential Commands 0.33.2-mc1.20 ec-core: Essential Commands Core 1.3.0-mc1.20 playerabilitylib: Pal 1.8.0 fabric-api: Fabric API 0.84.0+1.20.1 fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.34+4d8536c977 fabric-biome-api-v1: Fabric Biome API (v1) 13.0.10+b3afc78b77 fabric-block-api-v1: Fabric Block API (v1) 1.0.9+e022e5d177 fabric-command-api-v1: Fabric Command API (v1) 1.2.32+f71b366f77 fabric-command-api-v2: Fabric Command API (v2) 2.2.11+b3afc78b77 fabric-commands-v0: Fabric Commands (v0) 0.2.49+df3654b377 fabric-containers-v0: Fabric Containers (v0) 0.1.61+df3654b377 fabric-content-registries-v0: Fabric Content Registries (v0) 4.0.7+b3afc78b77 fabric-convention-tags-v1: Fabric Convention Tags 1.5.3+b3afc78b77 fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.2.18+aeb40ebe77 fabric-data-generation-api-v1: Fabric Data Generation API (v1) 12.1.11+b3afc78b77 fabric-dimensions-v1: Fabric Dimensions API (v1) 2.1.51+b3afc78b77 fabric-entity-events-v1: Fabric Entity Events (v1) 1.5.21+b3afc78b77 fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.6.0+b3afc78b77 fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.2.61+df3654b377 fabric-game-rule-api-v1: Fabric Game Rule API (v1) 1.0.38+b04edc7a77 fabric-item-api-v1: Fabric Item API (v1) 2.1.26+b3afc78b77 fabric-item-group-api-v1: Fabric Item Group API (v1) 4.0.7+b3afc78b77 fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.2.20+b3afc78b77 fabric-loot-api-v2: Fabric Loot API (v2) 1.1.37+b3afc78b77 fabric-loot-tables-v1: Fabric Loot Tables (v1) 1.1.41+9e7660c677 fabric-message-api-v1: Fabric Message API (v1) 5.1.6+b3afc78b77 fabric-mining-level-api-v1: Fabric Mining Level API (v1) 2.1.47+b3afc78b77 fabric-networking-api-v1: Fabric Networking API (v1) 1.3.8+b3afc78b77 fabric-networking-v0: Fabric Networking (v0) 0.3.48+df3654b377 fabric-object-builder-api-v1: Fabric Object Builder API (v1) 11.0.6+b3afc78b77 fabric-particles-v1: Fabric Particles (v1) 1.0.28+b3afc78b77 fabric-recipe-api-v1: Fabric Recipe API (v1) 1.0.18+b3afc78b77 fabric-registry-sync-v0: Fabric Registry Sync (v0) 2.2.6+b3afc78b77 fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.3.33+b3afc78b77 fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.0.26+b3afc78b77 fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 2.3.5+ea08f9d877 fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.11.7+f7923f6d77 fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.27+b3afc78b77 fabric-transfer-api-v1: Fabric Transfer API (v1) 3.2.2+b3afc78b77 fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 4.2.0+b3afc78b77 fabric-language-kotlin: Fabric Language Kotlin 1.9.6+kotlin.1.8.22 org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 1.8.22 org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 1.8.22 org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 1.8.22 org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 1.8.22 org_jetbrains_kotlinx_atomicfu-jvm: atomicfu-jvm 0.21.0 org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.7.1 org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.7.1 org_jetbrains_kotlinx_kotlinx-datetime-jvm: kotlinx-datetime-jvm 0.4.0 org_jetbrains_kotlinx_kotlinx-serialization-cbor-jvm: kotlinx-serialization-cbor-jvm 1.5.1 org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.5.1 org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.5.1 fabricloader: Fabric Loader 0.14.21 fabrictailor: Fabric Tailor 2.1.2 config2brigadier: Config to Brigadier 1.2.3 ferritecore: FerriteCore 6.0.0 goml: Get Off My Lawn ReServed 1.9.0+1.20-rc1 cardinal-components-base: Cardinal Components API (base) 5.0.2 cardinal-components-world: Cardinal Components API (worlds) 5.0.2 polymer-core: Polymer (Core) 0.5.0-rc.2+1.20-rc1 polymer-networking: Polymer (Networking) 0.5.0-rc.2+1.20-rc1 polymer-common: Polymer (Common) 0.5.0-rc.2+1.20-rc1 rtree-3i-lite-fabric: rtree-3i-lite for Fabric 0.3.0 sgui: sgui 1.2.2+1.20 horsebuff: HorseBuff 2.1.1 cloth-config: Cloth Config v11 11.0.99 cloth-basic-math: cloth-basic-math 0.6.1 htm: Hey That's Mine 1.1.9 common-protection-api: Common Protection API 1.0.0 inventorysorter: Inventory Sorter 1.9.0-1.20 kyrptconfig: Kyrpt Config 1.5.6-1.20 itemflexer: ItemFlexer 1.3.0 microconfig: Microconfig 2.2.1 java: OpenJDK 64-Bit Server VM 17 keepheadnames: Keep Head Names 1.5.1 krypton: Krypton 0.2.3 com_velocitypowered_velocity-native: velocity-native 3.2.0-SNAPSHOT ledger: Ledger 1.2.8 lithium: Lithium 0.11.2 mclogs: Mclogs 1.4.1 gs_mclo_api: api 4.0.1 memoryleakfix: Memory Leak Fix 1.1.1 com_github_llamalad7_mixinextras: MixinExtras 0.2.0-beta.8 minecraft: Minecraft 1.20.1 mixintrace: MixinTrace 1.1.1+1.17 mods-command: Mods Command 1.1.3 adventure-platform-fabric: adventure-platform-fabric 5.10.0-SNAPSHOT net_kyori_adventure-api: adventure-api 4.14.0 net_kyori_adventure-key: adventure-key 4.14.0 net_kyori_adventure-platform-api: adventure-platform-api 4.3.0 net_kyori_adventure-text-logger-slf4j: adventure-text-logger-slf4j 4.14.0 net_kyori_adventure-text-minimessage: adventure-text-minimessage 4.14.0 net_kyori_adventure-text-serializer-ansi: adventure-text-serializer-ansi 4.14.0 net_kyori_adventure-text-serializer-gson: adventure-text-serializer-gson 4.14.0 net_kyori_adventure-text-serializer-json: adventure-text-serializer-json 4.14.0 net_kyori_adventure-text-serializer-plain: adventure-text-serializer-plain 4.14.0 net_kyori_ansi: ansi 1.0.0 net_kyori_examination-api: examination-api 1.3.0 net_kyori_examination-string: examination-string 1.3.0 cloud: Cloud 1.8.3 cloud_commandframeworkcloud-brigadier: cloud-brigadier 1.8.3 cloud_commandframeworkcloud-core: cloud-core 1.8.3 cloud_commandframeworkcloud-services: cloud-services 1.8.3 cloud_commandframework_cloud-minecraft-extras: cloud-minecraft-extras 1.8.3 com_typesafe_config: config 1.4.2 io_leangen_geantyref_geantyref: geantyref 1.3.13 org_spongepowered_configurate-core: configurate-core 4.1.2 org_spongepowered_configurate-hocon: configurate-hocon 4.1.2 org_spongepowered_configurate-yaml: configurate-yaml 4.1.2 org_yaml_snakeyaml: snakeyaml 1.34-SNAPSHOT multiworldborders: Multi World Borders 1.6.1-fabric-1.20 nochatreports: No Chat Reports 1.20.1-v2.2.2 owo: oωo 0.11.0+1.20 blue_endless_jankson: jankson 1.2.2 pingspam: Pingspam 1.3.1+1.20 onedatastore: One Data Store 0.1.3+1.20 plan: Plan 5.5 build 2411 sdlink: Simple Discord Link 2.2.2 spark: spark 1.10.42 starlight: Starlight 1.1.2+fabric.dbc156f styledchat: Styled Chat 2.2.0+1.20 styledplayerlist: Styled Player List 3.1.1+1.20.1 player-data-api: Player Data API 0.2.2+1.19.3 predicate-api: Predicate API 0.1.2+1.20 tabtps-fabric: TabTPS 1.3.18 net_kyori_adventure-serializer-configurate4: adventure-serializer-configurate4 4.14.0 net_kyori_adventure-text-feature-pagination: adventure-text-feature-pagination 4.0.0-SNAPSHOT net_kyori_adventure-text-serializer-legacy: adventure-text-serializer-legacy 4.14.0 textile_backup: Textile Backup 3.1.0-1.20 com_github_shevek_parallelgzip: parallelgzip af5f5c297e735f3f2df7aa4eb0e19a5810b8aff6 org_apache_commons_commons-compress: commons-compress 1.22 org_tukaani_xz: xz 1.9 vcinteraction: Voice Chat Interaction 1.20.1-1.0.3 polymer-registry-sync-manipulator: Polymer (Registry Sync Manipulator) 0.5.0+1.20 voicechat: Simple Voice Chat 1.20.1-2.4.12 Server Running: true Player Count: 4 / 20; [class_3222['Stonebanks16'/192726, l='ServerLevel[world]', x=-318.28, y=65.00, z=236.96], class_3222['S_Sam312'/199849, l='ServerLevel[world]', x=8.06, y=73.00, z=331.28], class_3222['SirePoopAlot'/211602, l='ServerLevel[world]', x=-57.31, y=71.00, z=120.95], class_3222['iglushrek'/212339, l='ServerLevel[world]', x=194.96, y=76.54, z=814.95]] Data Packs: vanilla, fabric, file/afk display v1.1.4 (MC 1.20.x).zip, file/anti enderman grief v1.1.4 (MC 1.20.x).zip, file/armor statues v2.8.5 (MC 1.20.x).zip, file/double shulker shells v1.3.4 (MC 1.20.x).zip, file/more mob heads v2.12.1 (MC 1.20.x).zip, file/player head drops v1.1.4 (MC 1.20.x).zip, file/silence mobs v1.1.4 (MC 1.20.x).zip, file/track raw statistics v1.7.0 (MC 1.20.x).zip, file/track statistics v1.1.5 (MC 1.20.x).zip, file/unlock all recipes v2.0.5 (MC 1.20.x).zip, file/wandering trades hermit edition v1.8.1 (MC 1.20.x).zip, file/BlazeandCave's+Advancements+Pack+1.16.1.zip, file/fast leaf decay v2.0.7 (MC 1.20.x).zip Enabled Feature Flags: minecraft:vanilla World Generation: Stable Is Modded: Definitely; Server brand changed to 'fabric' Type: Dedicated Server (map_server.txt)`

[John-Paul-R]

I'm not entirely sure how this is happening, but I just simplified this code path a tiny bit. Hoping that resolves the issue (264e86f). Will be included in the next patch release.

[AchalS-iglu]

I'm not entirely sure how this is happening, but I just simplified this code path a tiny bit. Hoping that resolves the issue (264e86f). Will be included in the next patch release.

Hey, thank you! should I download the build file or wait for release?

[John-Paul-R]

Downloading the build from the GH Action artifacts should be good. Not sure when next release will be yet.

[AchalS-iglu]

Hey, your update fixed it! thanks!