[
http://jira.codehaus.org/browse/MNG-4835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=236286#action_236286
]
Benjamin Bentmann commented on MNG-4835:
----------------------------------------
The relevant pieces from the effective POM:
{code:xml}
<build>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-jxr-plugin</artifactId>
<version>2.2</version>
<dependencies>
<dependency>
<groupId>com.cedarsoft.maven</groupId>
<artifactId>cedarsoft-skin</artifactId>
<version>1.1.8</version>
</dependency>
</dependencies>
<configuration>
<aggregate>true</aggregate>
<inputEncoding>utf-8</inputEncoding>
<outputEncoding>utf-8</outputEncoding>
<stylesheet>xref/cedarsoft.css</stylesheet>
</configuration>
</plugin>
</pluginManagement>
</build>
<reporting>
<plugins>
<plugin>
<artifactId>maven-jxr-plugin</artifactId>
<version>2.1</version>
<configuration>
<aggregate>true</aggregate>
<inputEncoding>utf-8</inputEncoding>
<outputEncoding>utf-8</outputEncoding>
<stylesheet>xref/cedarsoft.css</stylesheet>
</configuration>
</plugin>
{code}
i.e. the maven-jxr-plugin is expected to load a "xref/cedarsoft.css" from its
classpath and the required library cedarsoft-skin is only configured for the
build section. This is something the new Site Plugin needs to address when it
creates the class realm for the report plugin.
> Site generation fails for small project
> ---------------------------------------
>
> Key: MNG-4835
> URL: http://jira.codehaus.org/browse/MNG-4835
> Project: Maven 2 & 3
> Issue Type: Bug
> Affects Versions: 3.0-beta-2
> Reporter: Johannes Schneider
> Priority: Critical
> Attachments: proj.zip
>
>
> I get that exception for my project and really don't know what is going on.
> I am sure this is a fault on my side, but I think there should be a better
> error message:
> [INFO] Generating "JavaNCSS Report" report --- javancss-maven-plugin:2.0
> [INFO] Generating "Source Xref" report --- maven-jxr-plugin:2.1
> [INFO]
> ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 9.623s
> [INFO] Finished at: Thu Sep 23 17:05:11 CEST 2010
> [INFO] Final Memory: 31M/233M
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-site-plugin:3.0-beta-2:site (default-site) on
> project my-artifact-id: Execution default-site of goal
> org.apache.maven.plugins:maven-site-plugin:3.0-beta-2:site failed.
> NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal org.apache.maven.plugins:maven-site-plugin:3.0-beta-2:site
> (default-site) on project my-artifact-id: Execution default-site of goal
> org.apache.maven.plugins:maven-site-plugin:3.0-beta-2:site failed.
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:211)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:140)
> 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:315)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:445)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:168)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:132)
> 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-site of goal
> org.apache.maven.plugins:maven-site-plugin:3.0-beta-2:site failed.
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:116)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:195)
> ... 19 more
> Caused by: java.lang.NullPointerException
> at org.codehaus.plexus.util.FileUtils.copyURLToFile(FileUtils.java:820)
> at
> org.apache.maven.plugin.jxr.AbstractJxrReport.copyRequiredResources(AbstractJxrReport.java:330)
> at
> org.apache.maven.plugin.jxr.AbstractJxrReport.createXref(AbstractJxrReport.java:265)
> at
> org.apache.maven.plugin.jxr.AbstractJxrReport.executeReport(AbstractJxrReport.java:409)
> at
> org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:101)
> at
> org.apache.maven.plugins.site.ReportDocumentRenderer.renderDocument(ReportDocumentRenderer.java:170)
> at
> org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.renderModule(DefaultSiteRenderer.java:330)
> at
> org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.render(DefaultSiteRenderer.java:134)
> at
> org.apache.maven.plugins.site.SiteMojo.renderLocale(SiteMojo.java:159)
> at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:122)
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:107)
> ... 20 more
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