jira-importer commented on issue #997: URL: https://github.com/apache/maven-javadoc-plugin/issues/997#issuecomment-2957368696
**[Christian Schulte](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=schulte77)** commented Having ```xml <reporting> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-javadoc-plugin</artifactId> <version>2.5</version> <reportSets> <reportSet> <id>javadoc</id> <inherited>true</inherited> <reports> <report>javadoc</report> </reports> <configuration> <aggregate>false</aggregate> <author>true</author> <charset>UTF-8</charset> <docencoding>UTF-8</docencoding> <encoding>UTF-8</encoding> <keywords>true</keywords> <doctitle>${pom.name} Specification ${pom.version}</doctitle> <linksource>true</linksource> <nodeprecated>true</nodeprecated> <quiet>false</quiet> <verbose>false</verbose> <serialwarn>true</serialwarn> <windowtitle>${pom.name} Specification ${pom.version}</windowtitle> <overview>${basedir}/src/main/javadoc/overview.html</overview> <show>public</show> <links> <link>http://java.sun.com/j2se/1.5.0/docs/api</link> </links> </configuration> </reportSet> <reportSet> <id>aggregate</id> <inherited>false</inherited> <reports> <report>aggregate</report> </reports> <configuration> <aggregate>true</aggregate> <breakiterator>true</breakiterator> <charset>UTF-8</charset> <docencoding>UTF-8</docencoding> <encoding>UTF-8</encoding> <keywords>false</keywords> <linksource>true</linksource> <serialwarn>true</serialwarn> <show>private</show> <doctitle>${pom.name} Specification ${pom.version}</doctitle> <windowtitle>${pom.name} Specification ${pom.version}</windowtitle> </configuration> </reportSet> </reportSets> </plugin> ``` in a parent pom from a multi-module project containing a mojo artifact defined like ```java * @goal java-resources * @phase generate-sources * @requiresDependencyResolution compile ``` still produces a similar stacktrace for me ```java [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Error extracting plugin descriptor: 'Goal: java-resources already exists in the plugin descriptor for prefix: some-prefix Existing implementation is: some.package.JavaResourcesMojo Conflicting implementation is: some.package.JavaResourcesMojo' at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:499) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.forkProjectLifecycle(DefaultLifecycleExecutor.java:924) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.forkLifecycle(DefaultLifecycleExecutor.java:767) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:549) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) 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 extracting plugin descriptor: 'Goal: java-resources already exists in the plugin descriptor for prefix: some-prefix Existing implementation is: some.package.JavaResourcesMojo Conflicting implementation is: some.package.JavaResourcesMojo' at org.apache.maven.plugin.plugin.AbstractGeneratorMojo.execute(AbstractGeneratorMojo.java:158) at org.apache.maven.plugin.plugin.HelpGeneratorMojo.execute(HelpGeneratorMojo.java:63) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558) ... 20 more Caused by: org.apache.maven.plugin.descriptor.DuplicateMojoDescriptorException: Goal: java-resources already exists in the plugin descriptor for prefix: some-prefix Existing implementation is: some.package.JavaResourcesMojo Conflicting implementation is: some.package.JavaResourcesMojo at org.apache.maven.plugin.descriptor.PluginDescriptor.addMojo(PluginDescriptor.java:103) at org.apache.maven.tools.plugin.scanner.DefaultMojoScanner.populatePluginDescriptor(DefaultMojoScanner.java:110) at org.apache.maven.plugin.plugin.AbstractGeneratorMojo.execute(AbstractGeneratorMojo.java:146) ... 23 more ``` when executing ```java mvn site:stage -DstagingDirectory=/tmp/staging -e ``` -- This is an automated message from the Apache Git Service. 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