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http://jira.codehaus.org/browse/MJAVADOC-156?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Vincent Siveton closed MJAVADOC-156.
------------------------------------

         Assignee: Vincent Siveton
       Resolution: Fixed
    Fix Version/s: 2.4

fixed in r586448

> UnsupportedOperationException in multi module project
> -----------------------------------------------------
>
>                 Key: MJAVADOC-156
>                 URL: http://jira.codehaus.org/browse/MJAVADOC-156
>             Project: Maven 2.x Javadoc Plugin
>          Issue Type: Bug
>         Environment: Maven version: 2.0.7 Java version: 1.4.2 OS name: 
> "windows xp" version: "5.1" arch: "x86"
>            Reporter: Michele Lorenzini
>            Assignee: Vincent Siveton
>             Fix For: 2.4
>
>         Attachments: MJAVADOC-156.zip
>
>
> Dealing with MJAVADOC-135, I switched on maven-javadoc-plugin version 
> 2.4-SNAPSHOT
> and I found the following problem:
> when creating the javadoc report for site in a multimodule project (using a 
> flat directory layout, so all three projects on the same
> level), UnsupportedOperationException is thrown.
> Say I have projA and projB each of them delcare maven-javadoc-plugin 
> 2.4-SNAPSHOT as report dependency.
> If I run mvn site on each project indipendently, the site (with javadoc 
> report) works fine.
> If I create a pom project which declares projA and projB as modules, running 
> mvn site on there fails with the following exception:
> java.lang.UnsupportedOperationException
>         at java.util.AbstractList.add(AbstractList.java:150)
>         at java.util.AbstractList.add(AbstractList.java:88)
>         at 
> org.apache.maven.plugin.javadoc.AbstractJavadocMojo.addLinkofflineArguments(AbstractJavadocMojo.java:2461)
>         at 
> org.apache.maven.plugin.javadoc.AbstractJavadocMojo.executeReport(AbstractJavadocMojo.java:1337)
>         at 
> org.apache.maven.plugin.javadoc.JavadocReport.generate(JavadocReport.java:135)
>         at 
> org.apache.maven.plugins.site.ReportDocumentRenderer.renderDocument(ReportDocumentRenderer.java:67)
>         at 
> org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.renderModule(DefaultSiteRenderer.java:239)
>         at 
> org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.render(DefaultSiteRenderer.java:115)
>         at 
> org.apache.maven.plugins.site.SiteMojo.renderLocale(SiteMojo.java:124)
>         at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:92)
>         at 
> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:443)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:48
> 0)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:459)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.jav
> a:311)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
>         at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:334)
>         at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:125)
>         at org.apache.maven.cli.MavenCli.main(MavenCli.java:280)
>         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:324)
>         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)
> If i set the plugin dependency to maven-javadoc-plugin 2.3 the same goal runs 
> fine.
> This will become an issue for me as I am waiting for 2.4 to solve MJAVADOC-135
> and I have a multimodule structure as the one described above.
> I will post a sample project in a while.

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