Sonar Sensor Maven dependencies - maven

Question

I'm trying to deploy some measures into Sonar 3.5 without using internal analyzers (CPD, SQUID ...) every thing seems to be ok but at the Maven dependency analysis i get the nullpointer Exception :
INFO] [08:23:01.789] Sensor Maven dependencies...
[DEBUG] Dependency tree resolution listener events:
[DEBUG] testArtifact: artifact=fr.tus.mvn-test:test-app:nar:2.0-SNAPSHOT
[DEBUG] includeArtifact: artifact=fr.tus.mvn-test:test-app:nar:2.0-SNAPSHOT
[DEBUG] startProcessChildren: artifact=fr.tus.mvn-test:test-app:nar:2.0-SNAPSHOT
[DEBUG] [08:23:01.797] Release semaphore on project : org.sonar.api.resources.Project#68dc2d[id=158,key=fr.tus:mvn-test,qualifier=TRK], with key batch-fr.tus:mvn-test
[DEBUG] [08:23:01.814] To prevent a memory leak, the JDBC Driver [com.mysql.jdbc.Driver] has been forcibly deregistered
[DEBUG] [08:23:01.819] Delete temporary directory: /tmp/sonar-batch59250110776125096297764152719386
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] mvn-test Project .................................. FAILURE [6.679s]
[INFO] mvn-library Project ............................... SKIPPED
[INFO] mvn-app Project ................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.481s
[INFO] Finished at: Sat Sep 21 08:23:01 PDT 2013
[INFO] Final Memory: 13M/182M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.sonar:sonar-maven-plugin:3.5:sonar (default-cli) on project mvn-test: Execution default-cli of goal org.codehaus.sonar:sonar-maven-plugin:3.5:sonar failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.sonar:sonar-maven-plugin:3.5:sonar (default-cli) on project mvn-test: Execution default-cli of goal org.codehaus.sonar:sonar-maven-plugin:3.5:sonar failed.
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-cli of goal org.codehaus.sonar:sonar-maven-plugin:3.5:sonar failed.
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
Caused by: java.lang.NullPointerException
at org.apache.maven.project.artifact.MavenMetadataSource.retrieveRelocatedProject(MavenMetadataSource.java:579)
at org.apache.maven.project.artifact.MavenMetadataSource.retrieve(MavenMetadataSource.java:192)
at org.apache.maven.repository.legacy.resolver.DefaultLegacyArtifactCollector.recurse(DefaultLegacyArtifactCollector.java:532)
at org.apache.maven.repository.legacy.resolver.DefaultLegacyArtifactCollector.collect(DefaultLegacyArtifactCollector.java:144)
at org.apache.maven.repository.legacy.resolver.DefaultLegacyArtifactCollector.collect(DefaultLegacyArtifactCollector.java:100)
at org.apache.maven.repository.legacy.resolver.DefaultLegacyArtifactCollector.collect(DefaultLegacyArtifactCollector.java:782)
at org.apache.maven.shared.dependency.tree.DefaultDependencyTreeBuilder.buildDependencyTree(DefaultDependencyTreeBuilder.java:97)
at org.sonar.plugins.design.batch.MavenDependenciesSensor.analyse(MavenDependenciesSensor.java:73)
at org.sonar.batch.phases.SensorsExecutor.execute(SensorsExecutor.java:70)
at org.sonar.batch.phases.Phases.execute(Phases.java:101)
at org.sonar.batch.scan.ScanContainer.doStart(ScanContainer.java:147)
at org.sonar.batch.bootstrap.Container.start(Container.java:72)
at org.sonar.batch.scan.ScanTask.scan(ScanTask.java:65)
at org.sonar.batch.scan.ScanTask.scanRecursively(ScanTask.java:56)
at org.sonar.batch.scan.ScanTask.scanRecursively(ScanTask.java:54)
at org.sonar.batch.scan.ScanTask.execute(ScanTask.java:49)
at org.sonar.batch.bootstrap.TaskContainer.doStart(TaskContainer.java:188)
at org.sonar.batch.bootstrap.Container.start(Container.java:72)
at org.sonar.batch.bootstrap.TaskBootstrapContainer.executeTask(TaskBootstrapContainer.java:73)
at org.sonar.batch.bootstrap.TaskBootstrapContainer.doStart(TaskBootstrapContainer.java:62)
at org.sonar.batch.bootstrap.Container.start(Container.java:72)
at org.sonar.batch.bootstrap.BootstrapContainer.doStart(BootstrapContainer.java:104)
at org.sonar.batch.bootstrap.Container.start(Container.java:72)
at org.sonar.batch.bootstrapper.Batch.startBatch(Batch.java:88)
at org.sonar.batch.bootstrapper.Batch.execute(Batch.java:72)
at org.sonar.maven.SonarMojo.execute(SonarMojo.java:150)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
... 20 more
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
When I run mvn dependency:tree the dependency tree is displayed correctly.
Thank you for your help.
Nadir.

Answer 1

As you're using Maven to compile C/C++ plugin, SonarQube is trying to analyse the dependencies that are specified in your POM. It looks like one of those is relocated but Maven can't manage to retrieve it - but I can't tell you how to fix this.
What you can do is to run the SonarQube analysis using SonarQube Runner - which won't try to run the MavenDependenciesSensor class. I'm pretty sure this will solve your issue.