maven javadoc plugin error

[Marco Mistroni <mm...@gmail.com>]

hi all,
 i have following m2  project

parent
   |____ proj1
   |____ proj2


proj1 depends on 2 external libraries,  hibernate and a custom jar tha ti
have made in the past

code compiles / tests / runs fine.. but when i generate mvn site:site from
the parent directory,
the plugin fails with following error


[INFO]
------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Error during page
generation
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(
DefaultLifecycleExecutor.java:559)
    at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(
DefaultLifecycleExecutor.java:488)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(
DefaultLifecycleExecutor.java:458)
    at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures
(DefaultLifecycleExecutor.java:306)
    at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(
DefaultLifecycleExecutor.java:273)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(
DefaultLifecycleExecutor.java:140)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
    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)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error during page
generation
    at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:97)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo(
DefaultPluginManager.java:412)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(
DefaultLifecycleExecutor.java:534)

here's my pom (copied from proficio application) - copied only relevant
portion, <reporting> tag

<reporting>
    <plugins>
      <plugin>
        <artifactId>maven-surefire-report-plugin</artifactId>
        <configuration>
          <showSuccess>false</showSuccess>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jxr-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-javadoc-plugin</artifactId>
        <configuration>
          <links>
            <link>http://java.sun.com/j2se/1.4.2/docs/api</link>
            <link>http://plexus.codehaus.org/ref/1.0-alpha-9/apidocs</link>
          </links>
          <aggregate>true</aggregate>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-pmd-plugin</artifactId>
        <configuration>
          <rulesets>
            <ruleset>/rulesets/basic.xml</ruleset>
            <ruleset>/rulesets/imports.xml</ruleset>
            <ruleset>/rulesets/unusedcode.xml</ruleset>
            <ruleset>/rulesets/finalizers.xml</ruleset>
          </rulesets>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-checkstyle-plugin</artifactId>
        <configuration>
          <configLocation>config/maven_checks.xml</configLocation>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>taglist-maven-plugin</artifactId>
        <configuration>
          <tags>
            <tag>TODO</tag>
            <tag>@todo</tag>
            <tag>FIXME</tag>
            <tag>XXX</tag>
            <tag>see</tag>
          </tags>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>cobertura-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </reporting>



can anyone help me out?

thanks and regards
 marco