[
http://jira.codehaus.org/browse/MSITE-457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=206686#action_206686
]
Johannes Schneider commented on MSITE-457:
------------------------------------------
Okay, I have found the problem.
I have moved the xref-plugin configuration (including the dependency that
contains the stylesheet) to the pluginManagement section.
While this works for the javadoc plugin (also has an additional dependency
declared and references the resource) it does not for xref.
So I had to move the dependency back to build.plugins.
Now it works as expected again.
I don't know enough about maven and plugin configuration to find out whether
this is a bug or my fault... I assume the second.
At least a better error message will be very helpful...
> NPE on source XREF
> ------------------
>
> Key: MSITE-457
> URL: http://jira.codehaus.org/browse/MSITE-457
> Project: Maven 2.x Site Plugin
> Issue Type: Bug
> Environment: Apache Maven 2.2.1 (r801777; 2009-08-06 21:16:01+0200)
> Java version: 1.6.0_16
> Java home: /usr/lib/jvm/java-6-sun-1.6.0.16/jre
> Default locale: en_US, platform encoding: UTF-8
> OS name: "linux" version: "2.6.31-17-generic" arch: "amd64" Family: "unix"
> Reporter: Johannes Schneider
>
> [INFO] Generating "Source Xref" report.
> [DEBUG] Scanning
> /home/johannes/projects/com.cedarsoft.commons/version/src/main/java
> [DEBUG] parsing... com/cedarsoft/VersionRange.java
> [DEBUG] parsing... com/cedarsoft/Version.java
> [DEBUG] parsing... com/cedarsoft/UnsupportedVersionRangeException.java
> [DEBUG] parsing... com/cedarsoft/VersionMismatchException.java
> [DEBUG] parsing... com/cedarsoft/UnsupportedVersionException.java
> [DEBUG] parsing... com/cedarsoft/VersionException.java
> [DEBUG]
> /home/johannes/projects/com.cedarsoft.commons/version/src/main/java/com/cedarsoft/VersionRange.java
> ->
> /home/johannes/projects/com.cedarsoft.commons/version/target/site/xref/com/cedarsoft/VersionRange.html
> [DEBUG]
> /home/johannes/projects/com.cedarsoft.commons/version/src/main/java/com/cedarsoft/Version.java
> ->
> /home/johannes/projects/com.cedarsoft.commons/version/target/site/xref/com/cedarsoft/Version.html
> [DEBUG]
> /home/johannes/projects/com.cedarsoft.commons/version/src/main/java/com/cedarsoft/UnsupportedVersionRangeException.java
> ->
> /home/johannes/projects/com.cedarsoft.commons/version/target/site/xref/com/cedarsoft/UnsupportedVersionRangeException.html
> [DEBUG]
> /home/johannes/projects/com.cedarsoft.commons/version/src/main/java/com/cedarsoft/VersionMismatchException.java
> ->
> /home/johannes/projects/com.cedarsoft.commons/version/target/site/xref/com/cedarsoft/VersionMismatchException.html
> [DEBUG]
> /home/johannes/projects/com.cedarsoft.commons/version/src/main/java/com/cedarsoft/UnsupportedVersionException.java
> ->
> /home/johannes/projects/com.cedarsoft.commons/version/target/site/xref/com/cedarsoft/UnsupportedVersionException.html
> [DEBUG]
> /home/johannes/projects/com.cedarsoft.commons/version/src/main/java/com/cedarsoft/VersionException.java
> ->
> /home/johannes/projects/com.cedarsoft.commons/version/target/site/xref/com/cedarsoft/VersionException.html
> [DEBUG] **************************************************************
> [DEBUG] Starting Jakarta Velocity v1.4
> [DEBUG] RuntimeInstance initializing.
> [DEBUG] Default Properties File:
> org/apache/velocity/runtime/defaults/velocity.properties
> [DEBUG] Trying to use logger class org.apache.maven.jxr.log.VelocityLogger
> [DEBUG] Using logger class org.apache.maven.jxr.log.VelocityLogger
> [DEBUG] Default ResourceManager initializing. (class
> org.apache.velocity.runtime.resource.ResourceManagerImpl)
> [DEBUG] Resource Loader Instantiated:
> org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
> [DEBUG] ClasspathResourceLoader : initialization starting.
> [DEBUG] ClasspathResourceLoader : initialization complete.
> [DEBUG] ResourceCache : initialized. (class
> org.apache.velocity.runtime.resource.ResourceCacheImpl)
> [DEBUG] Default ResourceManager initialization complete.
> [DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Literal
> [DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Macro
> [DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Parse
> [DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Include
> [DEBUG] Loaded System Directive: org.apache.velocity.runtime.directive.Foreach
> [DEBUG] Created: 20 parsers.
> [DEBUG] Velocimacro : initialization starting.
> [DEBUG] Velocimacro : allowInline = true : VMs can be defined inline in
> templates
> [DEBUG] Velocimacro : allowInlineToOverride = false : VMs defined inline may
> NOT replace previous VM definitions
> [DEBUG] Velocimacro : allowInlineLocal = false : VMs defined inline will be
> global in scope if allowed.
> [DEBUG] Velocimacro : messages on : VM system will output logging messages
> [DEBUG] Velocimacro : autoload off : VM system will not automatically reload
> global library macros
> [DEBUG] Velocimacro : initialization complete.
> [DEBUG] Velocity successfully started.
> [DEBUG] ResourceManager : found templates/index.vm with loader
> org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
> [DEBUG] ResourceManager : found templates/overview-frame.vm with loader
> org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
> [DEBUG] ResourceManager : found templates/allclasses-frame.vm with loader
> org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
> [DEBUG] ResourceManager : found templates/overview-summary.vm with loader
> org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
> [DEBUG] ResourceManager : found templates/package-summary.vm with loader
> org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
> [DEBUG] ResourceManager : found templates/package-frame.vm with loader
> org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] FATAL ERROR
> [INFO]
> ------------------------------------------------------------------------
> [INFO] null
> [INFO]
> ------------------------------------------------------------------------
> [DEBUG] Trace
> 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:164)
> at
> org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.renderModule(DefaultSiteRenderer.java:328)
> at
> org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.render(DefaultSiteRenderer.java:132)
> at
> org.apache.maven.plugins.site.SiteMojo.renderLocale(SiteMojo.java:142)
> at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:109)
> at
> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
> at
> org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
> 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.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: 20 seconds
> [INFO] Finished at: Tue Jan 12 20:21:16 CET 2010
> [INFO] Final Memory: 89M/186M
> [INFO] ----------------------------------------------------------------------
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