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Current MDK version gradle command "runClient" fails with UnsupportedClassVersionError


uglyluigi_

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Hi there,

 

I'm trying to set up my environment for modding 1.18. I downloaded the most current version of the MDK from the downloads page and was able to set up the IntelliJ project files using the gradle wrapper with no issues. However, upon running runClient, the client crashes with the following error:

 

/Library/Java/JavaVirtualMachines/microsoft-16.jdk/Contents/Home/bin/java -Dforge.logging.console.level=debug -Dforge.logging.markers=REGISTRIES -DlegacyClassPath.file=/Users/uglyluigi/mcmodding/forge-1.18.1-39.0.16-mdk/build/classpath/runClient_minecraftClasspath.txt -DignoreList=bootstraplauncher,securejarhandler,asm-commons,asm-util,asm-analysis,asm-tree,asm,client-extra,fmlcore,javafmllanguage,mclanguage,forge- -DnativesDirectory=/Users/uglyluigi/mcmodding/forge-1.18.1-39.0.16-mdk/build/natives -DmergeModules=jna-5.8.0.jar,jna-platform-58.0.jar,java-objc-bridge-1.0.0.jar -p /Users/uglyluigi/.gradle/caches/modules-2/files-2.1/cpw.mods/bootstraplauncher/0.1.17/899fb8e3912bb7d14a6f9611de117f77db710ec3/bootstraplauncher-0.1.17.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/cpw.mods/securejarhandler/0.9.54/24b670f2c026ec9777e64a2c2126ebc8635dbe8d/securejarhandler-0.9.54.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-commons/9.1/8b971b182eb5cf100b9e8d4119152d83e00e0fdd/asm-commons-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-util/9.1/36464a45d871779f3383a8a9aba2b26562a86729/asm-util-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-analysis/9.1/4f61b83b81d8b659958f4bcc48907e93ecea55a0/asm-analysis-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-tree/9.1/c333f2a855069cb8eb17a40a3eb8b1b67755d0eb/asm-tree-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm/9.1/a99500cf6eea30535eeac6be73899d048f8d12a8/asm-9.1.jar --add-modules ALL-MODULE-PATH --add-opens java.base/java.util.jar=cpw.mods.securejarhandler --add-exports java.base/sun.security.util=cpw.mods.securejarhandler --add-exports jdk.naming.dns/com.sun.jndi.dns=java.naming -XstartOnFirstThread -javaagent:/Applications/IntelliJ IDEA CE.app/Contents/lib/idea_rt.jar=65254:/Applications/IntelliJ IDEA CE.app/Contents/bin -Dfile.encoding=UTF-8 -classpath /Users/uglyluigi/mcmodding/forge-1.18.1-39.0.16-mdk/build/classes/java/main:/Users/uglyluigi/mcmodding/forge-1.18.1-39.0.16-mdk/build/resources/main:/Users/uglyluigi/.gradle/caches/forge_gradle/minecraft_user_repo/net/minecraftforge/forge/1.18.1-39.0.16_mapped_official_1.18.1/forge-1.18.1-39.0.16_mapped_official_1.18.1.jar:/Users/uglyluigi/.gradle/caches/forge_gradle/minecraft_repo/versions/1.18.1/client-extra.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecraftforge/fmlloader/1.18.1-39.0.16/8e4f15706a139c727a78d8bb8473c91adc75dec5/fmlloader-1.18.1-39.0.16.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/com.google.guava/guava/31.0.1-jre/119ea2b2bc205b138974d351777b20f02b92704b/guava-31.0.1-jre.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/com.google.code.findbugs/jsr305/3.0.2/25ea2e8b0c338a877313bd4672d3fe056ea78f0d/jsr305-3.0.2.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/ca.weblite/java-objc-bridge/1.0.0/6ef160c3133a78de015830860197602ca1c855d3/java-objc-bridge-1.0.0.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecraftforge/mergetool/1.1.3/d7d4b6eac7f49c59255c8ac25190802c29ac9a4a/mergetool-1.1.3-api.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.jetbrains/annotations/23.0.0/8cc20c07506ec18e0834947b84a864bfc094484e/annotations-23.0.0.jar:/Users/uglyluigi/.gradle/caches/forge_gradle/mcp_repo/net/minecraft/mapping/1.18.1/mapping-1.18.1-mapping.zip:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.openjdk.nashorn/nashorn-core/15.3/43977e804697048fc8d81d333a36c17d07a5b3dd/nashorn-core-15.3.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/cpw.mods/modlauncher/9.0.21/6ea1818503864d693b5456a94358d87848a4dc5f/modlauncher-9.0.21.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-commons/9.1/8b971b182eb5cf100b9e8d4119152d83e00e0fdd/asm-commons-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-util/9.1/36464a45d871779f3383a8a9aba2b26562a86729/asm-util-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-analysis/9.1/4f61b83b81d8b659958f4bcc48907e93ecea55a0/asm-analysis-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm-tree/9.1/c333f2a855069cb8eb17a40a3eb8b1b67755d0eb/asm-tree-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.ow2.asm/asm/9.1/a99500cf6eea30535eeac6be73899d048f8d12a8/asm-9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecraftforge/accesstransformers/8.0.4/272d240aa73f42195b2a68e2ebd8b701ecf41f63/accesstransformers-8.0.4.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.antlr/antlr4-runtime/4.9.1/428664f05d2b7f7b7610204b5aa7c1763f62011a/antlr4-runtime-4.9.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecraftforge/fmlcore/1.18.1-39.0.16/e6849ad44b01fa2c44726c27a234625e0c67b415/fmlcore-1.18.1-39.0.16.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecraftforge/eventbus/5.0.7/5589e7511c4993054e6a80890618b46ed53519a0/eventbus-5.0.7.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecraftforge/forgespi/4.0.11/beba03c49f418c8d66aae30a6df69bde4fce2f18/forgespi-4.0.11.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecraftforge/coremods/5.0.2/ca04eeee6c3764c151b2a2efa675057a7531acc4/coremods-5.0.2.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecraftforge/unsafe/0.2.0/54d7a0a5e8fdb71b973025caa46f341ae5904f39/unsafe-0.2.0.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/com.electronwill.night-config/toml/3.6.4/51d6cefb2b55ee55ee26b16391212fb2c7dfb4f4/toml-3.6.4.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/com.electronwill.night-config/core/3.6.4/510f174abbf1c947494db50ef2445683bd52c230/core-3.6.4.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.apache.maven/maven-artifact/3.8.1/114a2dd16c4c568bf0ca57719b83f2685dcc5734/maven-artifact-3.8.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.apache.commons/commons-lang3/3.12.0/c6842c86792ff03b9f1d1fe2aab8dc23aa6c6f0e/commons-lang3-3.12.0.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.jodah/typetools/0.8.3/98f84f353457629e81cc6827224871b1a8faa7af/typetools-0.8.3.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.minecrell/terminalconsoleappender/1.2.0/96d02cd3b384ff015a8fef4223bcb4ccf1717c95/terminalconsoleappender-1.2.0.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.apache.logging.log4j/log4j-slf4j18-impl/2.15.0/88f72ad364bfc3a7cf43186fc17212f2b4bb8d97/log4j-slf4j18-impl-2.15.0.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.jline/jline-reader/3.12.1/4382ab1382c7b6f379377ed5f665dc2f6e1218bc/jline-reader-3.12.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/org.jline/jline-terminal/3.12.1/c777448314e050d980a6b697c140f3bfe9eb7416/jline-terminal-3.12.1.jar:/Users/uglyluigi/.gradle/caches/modules-2/files-2.1/net.sf.jopt-simple/jopt-simple/5.0.4/4fdac2fbe92dfad86aa6e9301736f6b4342a3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cpw.mods.bootstraplauncher.BootstrapLauncher --launchTarget forgeclientuserdev --version MOD_DEV --assetIndex 1.18 --assetsDir /Users/uglyluigi/.gradle/caches/forge_gradle/assets --gameDir . --fml.forgeVersion 39.0.16 --fml.mcVersion 1.18.1 --fml.forgeGroup net.minecraftforge --fml.mcpVersion 20211210.034407
2022-01-09 17:52:27,737 main WARN Advanced terminal features are not available in this environment
[17:52:27] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, forgeclientuserdev, --version, MOD_DEV, --assetIndex, 1.18, --assetsDir, /Users/uglyluigi/.gradle/caches/forge_gradle/assets, --gameDir, ., --fml.forgeVersion, 39.0.16, --fml.mcVersion, 1.18.1, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20211210.034407]
Forge[17:52:27] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 9.0.21+9.0.21+main.6bb4b073 starting: java version 16.0.2 by Microsoft
ForgeException in thread "main" java.util.ServiceConfigurationError: cpw.mods.modlauncher.api.ILaunchHandlerService: Unable to load net.minecraftforge.fml.loading.targets.FMLClientLaunchHandler
	at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:582)
	at java.base/java.util.ServiceLoader.loadProvider(ServiceLoader.java:854)
	at java.base/java.util.ServiceLoader$LayerLookupIterator.hasNext(ServiceLoader.java:951)
	at java.base/java.util.ServiceLoader$ProviderSpliterator.tryAdvance(ServiceLoader.java:1481)
	at java.base/java.util.Spliterator.forEachRemaining(Spliterator.java:326)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.<init>(LaunchServiceHandler.java:40)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.<init>(Launcher.java:53)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:77)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
	at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:90)
Caused by: java.lang.UnsupportedClassVersionError: net/minecraftforge/fml/loading/targets/FMLClientLaunchHandler has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 60.0
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1010)
	at [email protected]/cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:116)
	at [email protected]/cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:213)
	at [email protected]/cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:223)
	at [email protected]/cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:213)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:631)
	at java.base/java.lang.Class.forName(Class.java:543)
	at java.base/java.util.ServiceLoader.loadProvider(ServiceLoader.java:852)
	... 14 more

It appears the relevant part of the stack trace is 

FMLClientLaunchHandler has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 60.0

I am definitely using JDK 16 because that's the highest version of the JDK that is available for AArch64, but the current MDK version appears to require JVC 61.0 which corresponds to JDK 17. Is this intentional?

 

** Apparent issue ** Current MDK is build with JDK 17.

 

** Suggested fix ** Build with JDK 16 instead.

 

** Probable errors ** I might have downloaded a bleeding-edge build... but it's the version listed on the page the docs link to, so I'm not sure.

 

My environment: M1 Max Macbook Pro using jdk-16.0.2-ga from here: https://github.com/microsoft/openjdk-aarch64/releases

 

 

Edited by uglyluigi_
Submitted too early with command+enter... I didn't know it did that.
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