nGrinder - Unsupported class file major version 61

발생 시나리오

로컬 자바 버전

java version "17.0.6" 2023-01-17 LTS
Java(TM) SE Runtime Environment (build 17.0.6+9-LTS-190)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.6+9-LTS-190, mixed mode, sharing)

nGrinder -> script -> validate 실행

2023-04-25 21:57:47,218 ERROR Script error - Error while initialize test runnernet.grinder.engine.common.EngineException: Error while initialize test runner
	at net.grinder.scriptengine.groovy.GroovyScriptEngine.<init>(GroovyScriptEngine.java:71)
	at net.grinder.scriptengine.groovy.GroovyScriptEngineService.createScriptEngine(GroovyScriptEngineService.java:87)
	at net.grinder.engine.process.ScriptEngineContainer.getScriptEngine(ScriptEngineContainer.java:105)
	at net.grinder.engine.process.GrinderProcess.run(GrinderProcess.java:345)
	at net.grinder.engine.process.WorkerProcessEntryPoint.run(WorkerProcessEntryPoint.java:87)
	at net.grinder.engine.process.WorkerProcessEntryPoint.main(WorkerProcessEntryPoint.java:60)
Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
General error during conversion: Unsupported class file major version 61 

java.lang.IllegalArgumentException: Unsupported class file major version 61
	at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:196)
	at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:177)
	at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:163)
	at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:284) 
	at org.codehaus.groovy.ast.decompiled.AsmDecompiler.parseClass(AsmDecompiler.java:81) 
	at org.codehaus.groovy.control.ClassNodeResolver.findDecompiled(ClassNodeResolver.java:251) 
	at org.codehaus.groovy.control.ClassNodeResolver.tryAsLoaderClassOrScript(ClassNodeResolver.java:189) 
	at org.codehaus.groovy.control.ClassNodeResolver.findClassNode(ClassNodeResolver.java:169) 
	at org.codehaus.groovy.control.ClassNodeResolver.resolveName(ClassNodeResolver.java:125)  
	at org.codehaus.groovy.ast.decompiled.AsmReferenceResolver.resolveClassNullable(AsmReferenceResolver.java:57)  
	at org.codehaus.groovy.ast.decompiled.Annotations.createAnnotationNode(Annotations.java:40)
...

• Unsupported class file major version 61 에러 발생

원인

• nGrinder가 지원하지 않는 버전인 17버전을 사용하여 발생하였다.

해결

nGrinder가 지원하는 버전인 8 또는 11로 변경

java version "11.0.17" 2022-10-18 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.17+10-LTS-269)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.17+10-LTS-269, mixed mode)

다음과 같이 잘 실행되는 것을 확인할 수 있다.