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https://issues.apache.org/jira/browse/MNG-6860?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17031848#comment-17031848
]
Herve Boutemy commented on MNG-6860:
------------------------------------
notice that Doxia site is a pure site, not a Java component, then {{mvn
verify}} is not really expected to be used: what is expected is {{mvn site}}
> Internal Error verifying Doxia site
> -----------------------------------
>
> Key: MNG-6860
> URL: https://issues.apache.org/jira/browse/MNG-6860
> Project: Maven
> Issue Type: Bug
> Affects Versions: 3.6.1
> Reporter: Elliotte Rusty Harold
> Priority: Major
> Fix For: 3.6.3
>
>
> Checked out doxia-site from [https://github.com/apache/maven-doxia-site] and
> ran mvn verify on Linux with JDK 8.
>
> I estimate there's three different errors here to make this happen. This
> issue is for whatever in core is causing an InternalErrorException when
> likely faced with a somehow broken project setup.
>
> {noformat}
> elharo@elharo1:~/maven-doxia-site$ mvn verify
> [INFO] Scanning for projects...
> Downloading from apache.snapshots:
> [https://repository.apache.org/snapshots/org/apache/maven/maven-parent/34-SNAPSHOT/maven-metadata.xml]
> Downloading from apache.snapshots:
> [https://repository.apache.org/snapshots/org/apache/apache/22-SNAPSHOT/maven-metadata.xml]
> [ERROR] Internal error: java.lang.NullPointerException -> [Help 1]
> org.apache.maven.InternalErrorException: Internal error:
> java.lang.NullPointerException
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:120)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
> at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:498)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:282)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:225)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:406)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
> Caused by: java.lang.NullPointerException
> at org.apache.maven.model.plugin.DefaultReportingConverter.convert
> (DefaultReportingConverter.java:243)
> at org.apache.maven.model.plugin.DefaultReportingConverter.convert
> (DefaultReportingConverter.java:213)
> at org.apache.maven.model.plugin.DefaultReportingConverter.convertReporting
> (DefaultReportingConverter.java:140)
> at org.apache.maven.model.building.DefaultModelBuilder.build
> (DefaultModelBuilder.java:479)
> at org.apache.maven.model.building.DefaultModelBuilder.build
> (DefaultModelBuilder.java:432)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:616)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:385)
> at org.apache.maven.graph.DefaultGraphBuilder.collectProjects
> (DefaultGraphBuilder.java:414)
> at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor
> (DefaultGraphBuilder.java:405)
> at org.apache.maven.graph.DefaultGraphBuilder.build
> (DefaultGraphBuilder.java:82)
> at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:507)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:219)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
> at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:498)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:282)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:225)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:406)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
> [ERROR]
> [ERROR] To see the full stack trace of the errors, re-run Maven with the -e
> switch.
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
> [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/InternalErrorException]
> {noformat}
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