在一个非常基础的项目上运行gradle init - 只有2个测试依赖项（junit和assertj-core）会导致CycleDetectedException。完全错误如下。
知道为什么简单的Maven Java项目无法转换为Gradle？
alik@ap:~/DevP/lean$ gradle --stacktrace init
:wrapper UP-TO-DATE
:init
Maven to Gradle conversion is an incubating feature.
:init FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':init'.
> Could not convert Maven POM /home/alik/DevP/lean/pom.xml to a Gradle build.
> Unable to create Maven project model using POM /home/alik/DevP/lean/pom.xml.
> Cycle detected in component graph in the system:
* Try:
Run with --info or --debug option to get more log output.
* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':init'.
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:25)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:110)
at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:37)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
at org.gradle.execution.DefaultBuildExecuter.access$000(DefaultBuildExecuter.java:23)
at org.gradle.execution.DefaultBuildExecuter$1.proceed(DefaultBuildExecuter.java:43)
at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:30)
at org.gradle.initialization.DefaultGradleLauncher$4.run(DefaultGradleLauncher.java:154)
at org.gradle.internal.Factories$1.create(Factories.java:22)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:52)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:151)
at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32)
at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:99)
at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:93)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:93)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:82)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:94)
at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:43)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:28)
at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:78)
at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:48)
at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:51)
at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:28)
at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:43)
at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:170)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:237)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:210)
at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35)
at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:206)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
at org.gradle.launcher.Main.doAction(Main.java:33)
at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:54)
at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:35)
at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
Caused by: org.gradle.buildinit.plugins.internal.maven.MavenConversionException: Could not convert Maven POM /home/alik/DevP/lean/pom.xml to a Gradle build.
at org.gradle.buildinit.plugins.internal.PomProjectInitDescriptor.generate(PomProjectInitDescriptor.groovy:44)
at org.gradle.buildinit.plugins.internal.TemplateOperation$generate.call(Unknown Source)
at org.gradle.buildinit.tasks.InitBuild.setupProjectLayout(InitBuild.groovy:61)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:227)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:220)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:209)
at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:585)
at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:568)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
... 57 more
Caused by: org.gradle.buildinit.plugins.internal.maven.MavenConversionException: Unable to create Maven project model using POM /home/alik/DevP/lean/pom.xml.
at org.gradle.buildinit.plugins.internal.maven.MavenProjectsCreator.create(MavenProjectsCreator.java:51)
at org.gradle.buildinit.plugins.internal.maven.MavenProjectsCreator$create.call(Unknown Source)
at org.gradle.buildinit.plugins.internal.PomProjectInitDescriptor.generate(PomProjectInitDescriptor.groovy:41)
... 67 more
Caused by: org.codehaus.plexus.PlexusContainerException: Cycle detected in component graph in the system:
at org.codehaus.plexus.DefaultPlexusContainer.initialize(DefaultPlexusContainer.java:624)
at org.codehaus.plexus.DefaultPlexusContainer.construct(DefaultPlexusContainer.java:281)
at org.codehaus.plexus.DefaultPlexusContainer.<init>(DefaultPlexusContainer.java:172)
at org.gradle.buildinit.plugins.internal.maven.MavenProjectsCreator.createNow(MavenProjectsCreator.java:60)
at org.gradle.buildinit.plugins.internal.maven.MavenProjectsCreator.create(MavenProjectsCreator.java:49)
... 69 more
Caused by: org.codehaus.plexus.component.composition.CycleDetectedInComponentGraphException: Cyclic requirement detected
at org.codehaus.plexus.component.composition.DefaultCompositionResolver.addComponentDescriptor(DefaultCompositionResolver.java:65)
at org.codehaus.plexus.component.repository.DefaultComponentRepository.addComponentDescriptor(DefaultComponentRepository.java:229)
at org.codehaus.plexus.DefaultComponentRegistry.addComponentDescriptor(DefaultComponentRegistry.java:126)
at org.codehaus.plexus.DefaultPlexusContainer.addComponentDescriptor(DefaultPlexusContainer.java:514)
at org.codehaus.plexus.DefaultPlexusContainer.discoverComponents(DefaultPlexusContainer.java:969)
at org.codehaus.plexus.DefaultPlexusContainer.discoverComponents(DefaultPlexusContainer.java:941)
at org.codehaus.plexus.DefaultPlexusContainer.initialize(DefaultPlexusContainer.java:560)
... 73 more
Caused by: org.codehaus.plexus.util.dag.CycleDetectedException: Edge between 'Vertex{label='org.apache.maven.plugin.MavenPluginManager:default'}' and 'Vertex{label='org.apache.maven.plugin.version.PluginVersionResolver:default'}' introduces to cycle in the graph org.apache.maven.plugin.version.PluginVersionResolver:default --> org.apache.maven.plugin.MavenPluginManager:default --> org.apache.maven.plugin.version.PluginVersionResolver:default
at org.codehaus.plexus.util.dag.DAG.addEdge(DAG.java:143)
at org.codehaus.plexus.util.dag.DAG.addEdge(DAG.java:123)
at org.codehaus.plexus.component.composition.DefaultCompositionResolver.addComponentDescriptor(DefaultCompositionResolver.java:60)
... 79 more
BUILD FAILED
Total time: 3.342 secs