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?
