Hi, I've continued dwelling on it. It appears it is not a specific plugin, but rather the appearance of the <reportSet> element. I've tried with both the javadoc and the project-info plugins - both cause the NPE when they have atleast one <reportSet> element. Having an empty <reportSets> does not cause the exception.
Filed in JIRA under: http://jira.codehaus.org/browse/MNG-1529 On 11/12/05, Brett Porter <[EMAIL PROTECTED]> wrote: > > Any NPE is a bug (even if it is just incorrect error reporting), so > please file it. > > Is there any reason yo need to use a report set for the javadoc > plugin? Can you narrow it down to which report is causing the issue? > > - Brett > > On 11/12/05, Arik Kfir <[EMAIL PROTECTED]> wrote: > > I have three POMs: > > > > A: serves as a template for new projects > > B: Extends A - the root POM of a multi-module project > > C: Extends B - a module in the B project > > > > One of the things project A defines is the <reporting> element. However, > > when I try to build project B, I get the following exception: > > > > [EMAIL PROTECTED]:~/projects/swinger$ mvn clean > > [INFO] Scanning for projects... > > [INFO] snapshot org.corleon:parent:1.1-SNAPSHOT: checking for updates > from > > corleon > > [INFO] > > > ---------------------------------------------------------------------------- > > [ERROR] FATAL ERROR > > [INFO] > > > ---------------------------------------------------------------------------- > > [INFO] null > > [INFO] > > > ---------------------------------------------------------------------------- > > [INFO] Trace > > java.lang.NullPointerException > > at java.util.TreeMap.compare(TreeMap.java:1093) > > at java.util.TreeMap.getEntry(TreeMap.java:347) > > at java.util.TreeMap.containsKey(TreeMap.java:204) > > at org.apache.maven.project.ModelUtils.mergeReportPluginDefinitions( > > ModelUtils.java:324) > > at org.apache.maven.project.ModelUtils.mergeReportPluginLists( > > ModelUtils.java:156) > > at > > > org.apache.maven.project.inheritance.DefaultModelInheritanceAssembler.assembleReportingInheritance > > (DefaultModelInheritanceAssembler.java:277) > > at > > > org.apache.maven.project.inheritance.DefaultModelInheritanceAssembler.assembleModelInheritance > > (DefaultModelInheritanceAssembler.java:170) > > at > > > org.apache.maven.project.inheritance.DefaultModelInheritanceAssembler.assembleModelInheritance > > (DefaultModelInheritanceAssembler.java:56) > > at org.apache.maven.project.DefaultMavenProjectBuilder.build( > > DefaultMavenProjectBuilder.java:605) > > at > org.apache.maven.project.DefaultMavenProjectBuilder.buildFromSourceFile( > > DefaultMavenProjectBuilder.java:298) > > at org.apache.maven.project.DefaultMavenProjectBuilder.build( > > DefaultMavenProjectBuilder.java:276) > > at org.apache.maven.DefaultMaven.getProject(DefaultMaven.java:509) > > at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:441) > > at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:485) > > at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:345) > > at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:276) > > at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:113) > > at org.apache.maven.cli.MavenCli.main(MavenCli.java:249) > > 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:585) > > at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) > > at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) > > at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) > > at org.codehaus.classworlds.Launcher.main(Launcher.java:375) > > [INFO] > > > ---------------------------------------------------------------------------- > > [INFO] Total time: < 1 second > > [INFO] Finished at: Sat Nov 12 13:45:14 IST 2005 > > [INFO] Final Memory: 1M/2M > > [INFO] > > > ---------------------------------------------------------------------------- > > > > I tracked down the problem to the <reporting> element in project A, > because > > when I remove it, things work again. I believe there's a problem in the > way > > maven merges reporting info from parent POMs (well..duh). > > > > Here is the reporting data in project A: > > <reporting> > > <plugins> > > <plugin> > > <artifactId>maven-javadoc-plugin</artifactId> > > <reportSets> > > <reportSet> > > <reports> > > <report>javadoc</report> > > </reports> > > </reportSet> > > </reportSets> > > </plugin> > > <plugin> > > <artifactId>maven-project-info-reports-plugin</artifactId> > > <reportSets> > > <reportSet> > > <reports> > > <report>dependencies</report> > > <report>project-team</report> > > <report>license</report> > > <report>scm</report> > > </reports> > > </reportSet> > > </reportSets> > > </plugin> > > <plugin> > > <groupId>org.codehaus.mojo</groupId> > > <artifactId>changes-maven-plugin</artifactId> > > <reportSets> > > <reportSet> > > <reports> > > <report>changes-report</report> > > </reports> > > </reportSet> > > </reportSets> > > </plugin> > > <plugin> > > <groupId>org.codehaus.mojo</groupId> > > <artifactId>surefire-report-maven-plugin</artifactId> > > </plugin> > > <plugin> > > <groupId>org.codehaus.mojo</groupId> > > <artifactId>taglist-maven-plugin</artifactId> > > </plugin> > > </plugins> > > </reporting> > > > > File a JIRA on this? Or did I miss something? > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
