Support 1.21.{5, 6, 7} by TsubakiDev · Pull Request #366 · kyngs/LibreLogin

TsubakiDev · 2025-06-28T07:47:11Z

Update to packetevents 2.8.0

deivaxxx · 2025-06-28T19:14:41Z

rly

jivanpal · 2025-07-05T18:40:11Z

@TsubakiDev Are you able to provide build instructions here and/or provide the compiled plugin JAR on your repo's releases page? Simply running ./gradlew build completes successfully, but the resulting JAR is unable to be loaded, with the following error:

[17:55:59] [Server thread/ERROR]: [ModernPluginLoadingStrategy] Could not load plugin 'LibreLogin.jar' in folder 'plugins'
java.lang.NoClassDefFoundError: xyz/kyngs/librelogin/api/provider/LibreLoginProvider
        at java.base/java.lang.ClassLoader.defineClass1(Native Method) ~[?:?]
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1027) ~[?:?]
        at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150) ~[?:?]
        at io.papermc.paper.plugin.entrypoint.classloader.PaperSimplePluginClassLoader.findClass(PaperSimplePluginClassLoader.java:103) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:593) ~[?:?]
        at io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader.loadClass(PaperPluginClassLoader.java:118) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader.loadClass(PaperPluginClassLoader.java:107) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?]
        at java.base/java.lang.Class.forName0(Native Method) ~[?:?]
        at java.base/java.lang.Class.forName(Class.java:534) ~[?:?]
        at java.base/java.lang.Class.forName(Class.java:513) ~[?:?]
        at io.papermc.paper.plugin.provider.util.ProviderUtil.loadClass(ProviderUtil.java:50) ~[purpur-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.provider.util.ProviderUtil.loadClass(ProviderUtil.java:29) ~[purpur-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.provider.type.paper.PaperPluginParent$PaperServerPluginProvider.createInstance(PaperPluginParent.java:169) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.provider.type.paper.PaperPluginParent$PaperServerPluginProvider.createInstance(PaperPluginParent.java:139) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.entrypoint.strategy.modern.ModernPluginLoadingStrategy.loadProviders(ModernPluginLoadingStrategy.java:116) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:38) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:39) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:581) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:269) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1176) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:311) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: xyz.kyngs.librelogin.api.provider.LibreLoginProvider
        at io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader.loadClass(PaperPluginClassLoader.java:146) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader.loadClass(PaperPluginClassLoader.java:107) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?]
        ... 23 more

I encounter essentially the same error when trying use a JAR built from the 0.24.0 source (current master branch on this original repo) with Purpur 1.21.4-2416. The actual JAR provided on the releases page works fine. I am building on Debian 12 with the msopenjdk-21 and gradle packages installed (Microsoft OpenJDK 21.0.5, Gradle 4.4.1):

$ java -version
openjdk version "21.0.5" 2024-10-15 LTS
OpenJDK Runtime Environment Microsoft-10376803 (build 21.0.5+11-LTS)
OpenJDK 64-Bit Server VM Microsoft-10376803 (build 21.0.5+11-LTS, mixed mode, sharing)

$ javac -version
javac 21.0.5

$ gradle --version
openjdk version "21.0.5" 2024-10-15 LTS
OpenJDK Runtime Environment Microsoft-10376803 (build 21.0.5+11-LTS)
OpenJDK 64-Bit Server VM Microsoft-10376803 (build 21.0.5+11-LTS, mixed mode, sharing)

------------------------------------------------------------
Gradle 4.4.1
------------------------------------------------------------

Build time:   2012-12-21 00:00:00 UTC
Revision:     none

Groovy:       2.4.21
Ant:          Apache Ant(TM) version 1.10.13 compiled on February 6 2023
JVM:          21.0.5 (Microsoft 21.0.5+11-LTS)
OS:           Linux 6.1.0-37-amd64 amd64

TsubakiDev · 2025-07-06T02:40:47Z

@TsubakiDev Are you able to provide build instructions here and/or provide the compiled plugin JAR on your repo's releases page? Simply running ./gradlew build completes successfully, but the resulting JAR is unable to be loaded, with the following error:

[17:55:59] [Server thread/ERROR]: [ModernPluginLoadingStrategy] Could not load plugin 'LibreLogin.jar' in folder 'plugins'
java.lang.NoClassDefFoundError: xyz/kyngs/librelogin/api/provider/LibreLoginProvider
        at java.base/java.lang.ClassLoader.defineClass1(Native Method) ~[?:?]
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1027) ~[?:?]
        at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150) ~[?:?]
        at io.papermc.paper.plugin.entrypoint.classloader.PaperSimplePluginClassLoader.findClass(PaperSimplePluginClassLoader.java:103) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:593) ~[?:?]
        at io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader.loadClass(PaperPluginClassLoader.java:118) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader.loadClass(PaperPluginClassLoader.java:107) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?]
        at java.base/java.lang.Class.forName0(Native Method) ~[?:?]
        at java.base/java.lang.Class.forName(Class.java:534) ~[?:?]
        at java.base/java.lang.Class.forName(Class.java:513) ~[?:?]
        at io.papermc.paper.plugin.provider.util.ProviderUtil.loadClass(ProviderUtil.java:50) ~[purpur-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.provider.util.ProviderUtil.loadClass(ProviderUtil.java:29) ~[purpur-api-1.21.5-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.provider.type.paper.PaperPluginParent$PaperServerPluginProvider.createInstance(PaperPluginParent.java:169) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.provider.type.paper.PaperPluginParent$PaperServerPluginProvider.createInstance(PaperPluginParent.java:139) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.entrypoint.strategy.modern.ModernPluginLoadingStrategy.loadProviders(ModernPluginLoadingStrategy.java:116) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:38) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:39) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:581) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:269) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1176) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:311) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: xyz.kyngs.librelogin.api.provider.LibreLoginProvider
        at io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader.loadClass(PaperPluginClassLoader.java:146) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader.loadClass(PaperPluginClassLoader.java:107) ~[purpur-1.21.5.jar:1.21.5-2450-61d7f55]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?]
        ... 23 more

I encounter essentially the same error when trying use a JAR built from the 0.24.0 source (current master branch on this original repo) with Purpur 1.21.4-2416. The actual JAR provided on the releases page works fine. I am building on Debian 12 with the msopenjdk-21 and gradle packages installed (Microsoft OpenJDK 21.0.5, Gradle 4.4.1):

$ java -version
openjdk version "21.0.5" 2024-10-15 LTS
OpenJDK Runtime Environment Microsoft-10376803 (build 21.0.5+11-LTS)
OpenJDK 64-Bit Server VM Microsoft-10376803 (build 21.0.5+11-LTS, mixed mode, sharing)

$ javac -version
javac 21.0.5

$ gradle --version
openjdk version "21.0.5" 2024-10-15 LTS
OpenJDK Runtime Environment Microsoft-10376803 (build 21.0.5+11-LTS)
OpenJDK 64-Bit Server VM Microsoft-10376803 (build 21.0.5+11-LTS, mixed mode, sharing)

------------------------------------------------------------
Gradle 4.4.1
------------------------------------------------------------

Build time:   2012-12-21 00:00:00 UTC
Revision:     none

Groovy:       2.4.21
Ant:          Apache Ant(TM) version 1.10.13 compiled on February 6 2023
JVM:          21.0.5 (Microsoft 21.0.5+11-LTS)
OS:           Linux 6.1.0-37-amd64 amd64

In this project, please use ./gradlew shadowJar to compile the jar file, because running ./gradlew build directly will not package the libraries into the jar file.

I have published the prebuilt jar in the https://github.com/MGTown/Librelogin repository.

pbl0 · 2025-07-12T17:16:13Z

Was getting this error on 1.21.7 when typing /login with the prebuilt jar.

[18:40:24 INFO]: BZ34 joined the game
[18:40:24 INFO]: BZ34[/192.168.1.18:53432] logged in with entity id 869 at ([limbo]0.0, 70.0, 0.0)
[18:40:39 INFO]: [packetevents] xyz.kyngs.librelogin.lib.packetevents.api.exception.PacketProcessException: Failed to map the Packet ID 12 to a PacketType constant. Bound: SERVER, Connection state: CONFIGURATION, Server version: 1.21.5
[18:40:39 INFO]: [packetevents] Disconnected BZ34 due to an invalid packet!
[18:40:39 INFO]: BZ34 lost connection: Disconnected
[18:40:39 INFO]: BZ34 left the game

Updating packetevents version to 2.9.1 and rebuilding seems to fix it.

TsubakiDev · 2025-07-15T10:36:09Z

I will push new updated jar file soon on my GitHub repo. pablo ***@***.***>于2025年7月13日周日01:16写道：

…

*pbl0* left a comment (kyngs/LibreLogin#366) <#366 (comment)> Was getting this error on 1.21.7 when typing /login with the prebuilt jar. [18:40:24 INFO]: BZ34 joined the game [18:40:24 INFO]: BZ34[/192.168.1.18:53432] logged in with entity id 869 at ([limbo]0.0, 70.0, 0.0) [18:40:39 INFO]: [packetevents] xyz.kyngs.librelogin.lib.packetevents.api.exception.PacketProcessException: Failed to map the Packet ID 12 to a PacketType constant. Bound: SERVER, Connection state: CONFIGURATION, Server version: 1.21.5 [18:40:39 INFO]: [packetevents] Disconnected BZ34 due to an invalid packet! [18:40:39 INFO]: BZ34 lost connection: Disconnected [18:40:39 INFO]: BZ34 left the game Updating packetevents version to 2.9.1 and rebuilding seems to fix it. — Reply to this email directly, view it on GitHub <#366 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A7VESAIA7WFLG4GLLZ63N2T3IE7HFAVCNFSM6AAAAACAKTUJHCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTANRVHA4DMMBZGY> . You are receiving this because you were mentioned.Message ID: ***@***.***>

TsubakiDev · 2025-07-21T14:19:54Z

I have republished the jar.

bassik1 · 2025-09-21T21:35:15Z

hi, is there possibility to update to 1.21.8? thanks

jakmar06 · 2025-09-21T22:23:11Z

https://modrinth.com/plugin/libreloginprod/

hi, is there possibility to update to 1.21.8? thanks

MiguVT · 2025-12-16T00:08:06Z

Hi! I made my own fork removing the dependencies that made the plugin hard to update (Moved from protocolize to PacketEvents), I want to share it here if someone needs an updated version, if kyngs want to continue supporting it I can make a PR <3 https://github.com/MiguVerse/LibreLoginNext

Update packetevents version

243b7d2

TsubakiDev changed the title ~~Update packetevents version~~ Support 1.21.{5, 6, 7} Jul 7, 2025

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Support 1.21.{5, 6, 7}#366

Support 1.21.{5, 6, 7}#366
TsubakiDev wants to merge 1 commit intokyngs:devfrom
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