JDK9 build failures on the build server

[Pascal Schumacher]

Hello,

does anybody know why the JDK9 build on the build server fails?
http://ci.groovy-lang.org/viewLog.html?buildId=25332&buildTypeId=Groovy_Jdk9Build&tab=buildLog&guest=1

[Gradle failure report] FAILURE: Build failed with an exception.
[12:26:10][Gradle failure report]
[12:26:10][Gradle failure report] * What went wrong:
[12:26:10][Gradle failure report] Execution failed for task 
':groovy-groovysh:test'.
[12:26:10][Gradle failure report] > Process 'Gradle Test Executor 32' 
finished with non-zero exit value 134
[12:26:10][Gradle failure report]
[12:26:10][Gradle failure report] * Try:
[12:26:10][Gradle failure report] Run with --info or --debug option to 
get more log output.
[12:26:10][Gradle failure report]
[12:26:10][Gradle failure report] * Exception is:
[12:26:10][Gradle failure report] 
org.gradle.api.tasks.TaskExecutionException: Execution failed for task 
':groovy-groovysh:test'.
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:208)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:186)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:62)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:25)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:111)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:37)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:62)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:68)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:62)
[12:26:10][Gradle failure report]     at 
org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:55)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher$6.run(DefaultGradleLauncher.java:174)
[12:26:10][Gradle failure report]     at 
org.gradle.internal.Factories$1.create(Factories.java:22)
[12:26:10][Gradle failure report]     at 
org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62)
[12:26:10][Gradle failure report]     at 
org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:47)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher.runBuildOperation(DefaultGradleLauncher.java:189)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:171)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:35)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:104)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:97)
[12:26:10][Gradle failure report]     at 
org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher.runRootBuildOperation(DefaultGradleLauncher.java:184)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:97)
[12:26:10][Gradle failure report]     at 
org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:86)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:93)
[12:26:10][Gradle failure report]     at 
org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:43)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:27)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:72)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:44)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:49)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
[12:26:10][Gradle failure report]     at 
org.gradle.util.Swapper.swap(Swapper.java:38)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.health.DaemonHealthTracker.execute(DaemonHealthTracker.java:40)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:66)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:71)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.health.HintGCAfterBuild.execute(HintGCAfterBuild.java:41)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
[12:26:10][Gradle failure report]     at 
org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:246)
[12:26:10][Gradle failure report]     at 
org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
[12:26:10][Gradle failure report]     at 
org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
[12:26:10][Gradle failure report]     at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[12:26:10][Gradle failure report]     at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[12:26:10][Gradle failure report]     at 
java.lang.Thread.run(Thread.java:745)
[12:26:10][Gradle failure report] Caused by: 
org.gradle.process.internal.ExecException: Process 'Gradle Test Executor 
32' finished with non-zero exit value 134
[12:26:10][Gradle failure report]     at 
org.gradle.process.internal.DefaultExecHandle$ExecResultImpl.assertNormalExitValue(DefaultExecHandle.java:366)
[12:26:10][Gradle failure report]     at 
org.gradle.process.internal.DefaultWorkerProcess.waitForStop(DefaultWorkerProcess.java:161)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.testing.worker.ForkingTestClassProcessor.stop(ForkingTestClassProcessor.java:86)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.testing.processors.RestartEveryNTestClassProcessor.endBatch(RestartEveryNTestClassProcessor.java:60)
[12:26:10][Gradle failure report]     at 
org.gradle.api.internal.tasks.testing.processors.RestartEveryNTestClassProcessor.processTestClass(RestartEveryNTestClassProcessor.java:48)
[12:26:10][Gradle failure report]     at 
sun.reflect.GeneratedMethodAccessor787.invoke(Unknown Source)
[12:26:10][Gradle failure report]     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[12:26:10][Gradle failure report]     at 
java.lang.reflect.Method.invoke(Method.java:502)
[12:26:10][Gradle failure report]     at 
org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
[12:26:10][Gradle failure report]     at 
org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
[12:26:10][Gradle failure report]     at 
org.gradle.messaging.dispatch.FailureHandlingDispatch.dispatch(FailureHandlingDispatch.java:29)
[12:26:10][Gradle failure report]     at 
org.gradle.messaging.dispatch.AsyncDispatch.dispatchMessages(AsyncDispatch.java:132)
[12:26:10][Gradle failure report]     at 
org.gradle.messaging.dispatch.AsyncDispatch.access$000(AsyncDispatch.java:33)
[12:26:10][Gradle failure report]     at 
org.gradle.messaging.dispatch.AsyncDispatch$1.run(AsyncDispatch.java:72)
[12:26:10][Gradle failure report]     ... 5 more

A short search of the web didn't give me anything useful.

Cheers,
Pascal