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http://jira.codehaus.org/browse/MNG-3100?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_104123
]
Marat Radchenko commented on MNG-3100:
--------------------------------------
I got the same exception for java plugin without @goal annotation.
> Problem during Ant Plugin development
> -------------------------------------
>
> Key: MNG-3100
> URL: http://jira.codehaus.org/browse/MNG-3100
> Project: Maven 2
> Issue Type: Bug
> Components: Documentation: Guides
> Affects Versions: Documentation
> Reporter: Anton Ananich
> Priority: Critical
>
> I'm investigating this manual about Developing Ant Plugins for Maven 2.x:
> http://maven.apache.org/guides/plugin/guide-ant-plugin-development.html
> I try to create the easiest HelloWorld plugin. As described in this manual:
> 1) I create Ant script
> 2) I create mojo
> 3) I create pom
> 4) I build it and install (successfully)
> And than I try to run it:
> c:\> mvn org.myproject.plugins:hello-plugin:hello
> Here is what I got:
> [INFO] Scanning for projects...
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] FATAL ERROR
> [INFO]
> ------------------------------------------------------------------------
> [INFO] null
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Trace
> java.lang.NullPointerException
> at
> org.apache.maven.plugin.descriptor.PluginDescriptor.getMojo(PluginDescriptor.java:262)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExecutor.java:1529)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.segmentTaskListByAggregationNeeds(DefaultLifecycleExecutor.java:386)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:138)
> 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:272)
> 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:585)
> 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: < 1 second
> [INFO] Finished at: Tue Jul 10 20:02:10 EEST 2007
> [INFO] Final Memory: 1M/2M
> [INFO]
> ------------------------------------------------------------------------
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