Bootstrap plugin NPE

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1

I am trying to convert maven project of Netty to Gradle using bootstrap plugin. Here is the exception I got:

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':maven2Gradle'.
 at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:72)
 at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:49)
 at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:34)
 at org.gradle.api.internal.changedetection.CacheLockHandlingTaskExecuter$1.run(CacheLockHandlingTaskExecuter.java:34)
 at org.gradle.internal.Factories$1.create(Factories.java:22)
 at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:179)
 at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:232)
 at org.gradle.cache.internal.DefaultPersistentDirectoryStore.longRunningOperation(DefaultPersistentDirectoryStore.java:142)
 at org.gradle.api.internal.changedetection.DefaultTaskArtifactStateCacheAccess.longRunningOperation(DefaultTaskArtifactStateCacheAccess.java:83)
 at org.gradle.api.internal.changedetection.CacheLockHandlingTaskExecuter.execute(CacheLockHandlingTaskExecuter.java:32)
 at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:55)
 at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:57)
 at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:41)
 at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:51)
 at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:52)
 at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:42)
 at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:275)
 at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.executeTask(DefaultTaskPlanExecutor.java:52)
 at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.processTask(DefaultTaskPlanExecutor.java:38)
 at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:30)
 at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:84)
 at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:29)
 at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
 at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
 at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67)
 at org.gradle.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter$1.run(TaskCacheLockHandlingBuildExecuter.java:31)
 at org.gradle.internal.Factories$1.create(Factories.java:22)
 at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:124)
 at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:112)
 at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:134)
 at org.gradle.api.internal.changedetection.DefaultTaskArtifactStateCacheAccess.useCache(DefaultTaskArtifactStateCacheAccess.java:79)
 at org.gradle.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter.execute(TaskCacheLockHandlingBuildExecuter.java:29)
 at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
 at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
 at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67)
 at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
 at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
 at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:54)
 at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:166)
 at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:113)
 at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:81)
 at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:38)
 at org.gradle.launcher.exec.InProcessGradleLauncherActionExecuter.execute(InProcessGradleLauncherActionExecuter.java:39)
 at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:45)
 at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:42)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:24)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.StartStopIfBuildAndStop.execute(StartStopIfBuildAndStop.java:33)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.ReturnResult.execute(ReturnResult.java:34)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:70)
 at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:68)
 at org.gradle.util.Swapper.swap(Swapper.java:38)
 at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:68)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
 at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:59)
 at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:45)
 at org.gradle.launcher.daemon.server.DaemonStateCoordinator.runCommand(DaemonStateCoordinator.java:186)
 at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy.doBuild(StartBuildOrRespondWithBusy.java:49)
 at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.HandleStop.execute(HandleStop.java:36)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.CatchAndForwardDaemonFailure.execute(CatchAndForwardDaemonFailure.java:32)
 at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:125)
 at org.gradle.launcher.daemon.server.exec.DefaultDaemonCommandExecuter.executeCommand(DefaultDaemonCommandExecuter.java:48)
 at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.handleCommand(DefaultIncomingConnectionHandler.java:155)
 at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.receiveAndHandleCommand(DefaultIncomingConnectionHandler.java:128)
 at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.run(DefaultIncomingConnectionHandler.java:116)
 at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)
Caused by: org.gradle.api.GradleException: Unable to create maven project model using pom file: /Users/Nikem/Documents/workspace/netty-netty-4.0.0.Alpha8-plumbr-custom/pom.xml
 at org.gradle.api.plugins.maven.internal.MavenProjectsCreator.create(MavenProjectsCreator.java:54)
 at org.gradle.api.plugins.maven.internal.MavenProjectsCreator$create.call(Unknown Source)
 at org.gradle.api.plugins.maven.ConvertMaven2Gradle.convertNow(ConvertMaven2Gradle.groovy:50)
 at org.gradle.api.internal.BeanDynamicObject$MetaClassAdapter.invokeMethod(BeanDynamicObject.java:216)
 at org.gradle.api.internal.BeanDynamicObject.invokeMethod(BeanDynamicObject.java:122)
 at org.gradle.api.internal.CompositeDynamicObject.invokeMethod(CompositeDynamicObject.java:147)
 at org.gradle.api.plugins.maven.ConvertMaven2Gradle_Decorated.invokeMethod(Unknown Source)
 at org.gradle.util.ReflectionUtil.invoke(ReflectionUtil.groovy:23)
 at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$4.execute(AnnotationProcessingTaskFactory.java:161)
 at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$4.execute(AnnotationProcessingTaskFactory.java:156)
 at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:510)
 at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:499)
 at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:64)
 ... 78 more
Caused by: java.lang.NullPointerException
 at org.gradle.mvn3.org.apache.maven.plugin.CacheUtils.getWorkspace(CacheUtils.java:207)
 at org.gradle.mvn3.org.apache.maven.plugin.DefaultPluginArtifactsCache$CacheKey.<init>(DefaultPluginArtifactsCache.java:67)
 at org.gradle.mvn3.org.apache.maven.plugin.DefaultPluginArtifactsCache.createKey(DefaultPluginArtifactsCache.java:141)
 at org.gradle.mvn3.org.apache.maven.project.DefaultProjectBuildingHelper.createProjectRealm(DefaultProjectBuildingHelper.java:223)
 at org.gradle.mvn3.org.apache.maven.project.DefaultModelBuildingListener.buildExtensionsAssembled(DefaultModelBuildingListener.java:106)
 at org.gradle.mvn3.org.apache.maven.model.building.ModelBuildingEventCatapult$1.fire(ModelBuildingEventCatapult.java:43)
 at org.gradle.mvn3.org.apache.maven.model.building.DefaultModelBuilder.fireEvent(DefaultModelBuilder.java:1053)
 at org.gradle.mvn3.org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:388)
 at org.gradle.mvn3.org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:371)
 at org.gradle.mvn3.org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:560)
 at org.gradle.mvn3.org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:566)
 at org.gradle.mvn3.org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:352)
 at org.gradle.api.plugins.maven.internal.MavenProjectsCreator.createNow(MavenProjectsCreator.java:83)
 at org.gradle.api.plugins.maven.internal.MavenProjectsCreator.create(MavenProjectsCreator.java:52)
 ... 90 more

BUILD FAILED

gradle -version

------------------------------------------------------------ Gradle 1.5 ------------------------------------------------------------

Gradle build time: Wednesday, March 27, 2013 1:51:06 PM UTC Groovy: 1.8.6 Ant: Apache Ant™ version 1.8.4 compiled on May 22 2012 Ivy: 2.2.0 JVM: 1.7.0_17 (Oracle Corporation 23.7-b01) OS: Mac OS X 10.8.3 x86_64

mvn -version Apache Maven 3.0.4 (r1232337; 2012-01-17 10:44:56+0200) Maven home: /usr/share/maven Java version: 1.7.0_17, vendor: Oracle Corporation Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_17.jdk/Contents/Home/jre Default locale: en_US, platform encoding: UTF-8 OS name: “mac os x”, version: “10.8.3”, arch: “x86_64”, family: “mac”

2

This looks like GRADLE-2666.

3

Gradle 1.6 will have the first “official” release of the ‘build-setup’ plugin (new name for the ‘bootstrap’ plugin). I believe this issue has been fixed, or certainly will be once this plugin is released and announced.

4

I beg your pardon, but 1.6, released today, has exactly the same problem! How could you make a functionality to one of the main features of the new release, when there is known blocker bug in it?

5

I just tried my project from which i reported http://issues.gradle.org/browse/GRADLE-2666 again. It just won’t work with Gradle 1.6. Same exception as before (note: retested on another computer)

Caused by: java.lang.NullPointerException

at org.gradle.mvn3.org.apache.maven.plugin.CacheUtils.getWorkspace(CacheUtils.java:207)

at org.gradle.mvn3.org.apache.maven.plugin.DefaultPluginArtifactsCache$CacheKey.(Defau ltPluginArtifactsCache.java:67)

6

Hey Carlo, we have seen this nullpointer in the past and it was reported in another thread. Is the project you tested publicly available?

7

No, this is not a public project. But in http://issues.gradle.org/browse/GRADLE-2666 you will find the attachment “dpjw.zip”, where I made the poms available (you need no other sources, don’t you?)

8

You can try Netty from Github: https://github.com/netty/netty. I get my error with it.

9

I still have the problem as well.

------------------------------------------------------------ Gradle 1.6 ------------------------------------------------------------

Gradle build time: Tuesday, May 7, 2013 9:12:14 AM UTC Groovy: 1.8.6 Ant: Apache Ant™ version 1.8.4 compiled on May 22 2012 Ivy: 2.2.0 JVM: 1.8.0-ea (Oracle Corporation 25.0-b25) OS: Linux 3.8.0-22-generic amd64

10

In my business environment it would be a killer argument if I could say: “Hey look, running this smart script and now you have - with no further costs - a complete migration from Maven to Gradle”.

So I hope this get’s fixed with 1.7.