1

我NoClassDefFoundError在尝试向我的自定义 Gradle 插件添加依赖项时遇到问题，但我还没有找到解决它的方法。

添加到插件的依赖块：

implementation("org.apache.logging.log4j:log4j-api:2.11.2")
implementation("org.apache.logging.log4j:log4j-core:2.11.2")

添加到插件的 DeclarationAttributeAltererExtension 实现：

val log = LogManager.getLogger(ReallyAllOpenExtension::class.java)

这是完整的堆栈跟踪：

no.synth.kotlin.plugins.reallyallopen.FunctionalPluginTest > should include plugin via plugins block FAILED
    org.gradle.testkit.runner.UnexpectedBuildFailure: Unexpected build execution failure in /var/folders/g4/024g2mzn7jl5s2b2cvg_ythh00016k/T/junit5022572406008108408 with arguments [build]

    Output:

    > Task :compileKotlin FAILED
    e: java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager
        at no.synth.kotlin.plugins.reallyallopen.ReallyAllOpenExtension.<clinit>(ReallyAllOpenPlugin.kt:106)
        at no.synth.kotlin.plugins.reallyallopen.ReallyAllOpenRegistrar.registerProjectComponents(ReallyAllOpenPlugin.kt:79)
        at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.<init>(KotlinCoreEnvironment.kt:174)
        at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.<init>(KotlinCoreEnvironment.kt:123)
        at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.createForProduction(KotlinCoreEnvironment.kt:413)
        at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.createCoreEnvironment(K2JVMCompiler.kt:259)
        at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:124)
        at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:54)
        at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:84)
        at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:42)
        at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:103)
        at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:364)
        at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:105)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:237)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.access$compileIncrementally(IncrementalCompilerRunner.kt:37)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner$compile$2.invoke(IncrementalCompilerRunner.kt:79)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:91)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl.execIncrementalCompiler(CompileServiceImpl.kt:597)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl.access$execIncrementalCompiler(CompileServiceImpl.kt:102)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:455)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:102)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:1023)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:102)
        at org.jetbrains.kotlin.daemon.common.DummyProfiler.withMeasure(PerfUtils.kt:137)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl.checkedCompile(CompileServiceImpl.kt:1065)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl.doCompile(CompileServiceImpl.kt:1022)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:454)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359)
        at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
        at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
        at java.base/java.security.AccessController.doPrivileged(Native Method)
        at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:562)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:796)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:677)
        at java.base/java.security.AccessController.doPrivileged(Native Method)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:676)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:834)
    Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.LogManager
        at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        ... 44 more

完整的实现和测试用例位于https://github.com/henrik242/kotlin-really-allopen/tree/unable-to-add-dependencies的单独分支中

通过运行重新创建问题./gradlew clean :kotlin-really-allopen:build :kotlin-really-allopen:publishToMavenLocal :functional-test:build

4

1 回答 1

2

我怀疑您的问题是由于使用 Gradle 的 TestKit 执行的插件的已知类加载器问题。

我将解释该链接所说的内容：您的插件及其运行时类路径由一个类加载器加载。功能测试及其类路径被加载到另一个不同的类加载器中。这种情况是NoClassDefFoundErrors的经典秘诀。因此，当使用带有自定义插件的 TestKit 时，插件的运行时类路径必须显式注入到正在执行插件的功能测试的运行时类路径中。

您的项目的组织方式（将功能测试作为子项目）可能会使那些已知的类加载器问题更加复杂。这肯定会使事情变得比他们需要的更复杂。

因此，您的问题的答案是：重新组织您的项目。

使用Gradle 用户指南作为指南，我简化了您的项目。我按照 Gradle 的建议对它进行了分叉和重组。

固定代码位于 fork 的能够添加依赖项分支中。

于 2019-05-03T03:14:08.813 回答