[ 
https://issues.apache.org/jira/browse/MNG-6033?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Utku Gultopu updated MNG-6033:
------------------------------
    Description: 
I am following the maven plugin 
[tutorial|https://maven.apache.org/guides/plugin/guide-java-plugin-development.html].

I have created the the {{GreetingMojo}} class and the POM as described in the 
tutorial, and run {{mvn install}} but I am getting the same error as indicated 
in 
[this|http://stackoverflow.com/questions/18999401/basic-maven-plugin-project-not-working-mojo-plugin-descriptors-not-generating]
 question (also by the issue MNG-5346).

[3.2.2 release notes|http://maven.apache.org/docs/3.2.2/release-notes.html] 
state that the issue is fixed. I have the 3.3.9 version of Maven. However, I 
still get:

{{org.apache.maven.plugin.descriptor.InvalidPluginDescriptorException: No mojo 
definitions were found for plugin: sample.plugin:hello-maven-plugin}}

The full stack trace is:

{code}
[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-plugin-plugin:3.2:descriptor 
(default-descriptor) on project hello-maven-plugin: Error extracting plugin 
descriptor: 'No mojo definitions were found for plugin: 
sample.plugin:hello-maven-plugin.' -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal 
org.apache.maven.plugins:maven-plugin-plugin:3.2:descriptor 
(default-descriptor) on project hello-maven-plugin: Error extracting plugin 
descriptor: 'No mojo definitions were found for plugin: 
sample.plugin:hello-maven-plugin.'
    at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
    at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
    at 
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
    at 
org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at 
org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at 
org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at 
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at 
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error extracting 
plugin descriptor: 'No mojo definitions were found for plugin: 
sample.plugin:hello-maven-plugin.'
    at 
org.apache.maven.plugin.plugin.AbstractGeneratorMojo.execute(AbstractGeneratorMojo.java:245)
    at 
org.apache.maven.plugin.plugin.DescriptorGeneratorMojo.execute(DescriptorGeneratorMojo.java:92)
    at 
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
    at 
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
    ... 20 more
Caused by: org.apache.maven.plugin.descriptor.InvalidPluginDescriptorException: 
No mojo definitions were found for plugin: sample.plugin:hello-maven-plugin.
    at 
org.apache.maven.tools.plugin.scanner.DefaultMojoScanner.populatePluginDescriptor(DefaultMojoScanner.java:126)
    at 
org.apache.maven.plugin.plugin.AbstractGeneratorMojo.execute(AbstractGeneratorMojo.java:233)
    ... 23 more
{code}

Am I missing something here?

  was:
I am following the maven plugin 
[tutorial|https://maven.apache.org/guides/plugin/guide-java-plugin-development.html].

I have created the the {{GreetingMojo}} class and the POM as described in the 
tutorial, and run {{mvn install}} but I am getting the same error as indicated 
in 
[this|http://stackoverflow.com/questions/18999401/basic-maven-plugin-project-not-working-mojo-plugin-descriptors-not-generating]
 question (also by the issue MNG-5346).

[3.2.2 release notes|http://maven.apache.org/docs/3.2.2/release-notes.html] 
state that the issue is fixed. I have the 3.3.9 version of Maven. However, I 
still get:

{{org.apache.maven.plugin.descriptor.InvalidPluginDescriptorException: No mojo 
definitions were found for plugin: sample.plugin:hello-maven-plugin}}

The full stack trace is:



Am I missing something here?


> Maven plugin tutorial not working as expected?
> ----------------------------------------------
>
>                 Key: MNG-6033
>                 URL: https://issues.apache.org/jira/browse/MNG-6033
>             Project: Maven
>          Issue Type: Question
>          Components: Documentation: Guides
>    Affects Versions: 3.3.9
>            Reporter: Utku Gultopu
>
> I am following the maven plugin 
> [tutorial|https://maven.apache.org/guides/plugin/guide-java-plugin-development.html].
> I have created the the {{GreetingMojo}} class and the POM as described in the 
> tutorial, and run {{mvn install}} but I am getting the same error as 
> indicated in 
> [this|http://stackoverflow.com/questions/18999401/basic-maven-plugin-project-not-working-mojo-plugin-descriptors-not-generating]
>  question (also by the issue MNG-5346).
> [3.2.2 release notes|http://maven.apache.org/docs/3.2.2/release-notes.html] 
> state that the issue is fixed. I have the 3.3.9 version of Maven. However, I 
> still get:
> {{org.apache.maven.plugin.descriptor.InvalidPluginDescriptorException: No 
> mojo definitions were found for plugin: sample.plugin:hello-maven-plugin}}
> The full stack trace is:
> {code}
> [ERROR] Failed to execute goal 
> org.apache.maven.plugins:maven-plugin-plugin:3.2:descriptor 
> (default-descriptor) on project hello-maven-plugin: Error extracting plugin 
> descriptor: 'No mojo definitions were found for plugin: 
> sample.plugin:hello-maven-plugin.' -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute 
> goal org.apache.maven.plugins:maven-plugin-plugin:3.2:descriptor 
> (default-descriptor) on project hello-maven-plugin: Error extracting plugin 
> descriptor: 'No mojo definitions were found for plugin: 
> sample.plugin:hello-maven-plugin.'
>     at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
>     at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
>     at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
>     at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
>     at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
>     at 
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
>     at 
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
>     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
>     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
>     at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
>     at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
>     at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
>     at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>     at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>     at java.lang.reflect.Method.invoke(Method.java:498)
>     at 
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
>     at 
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
>     at 
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
>     at 
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
> Caused by: org.apache.maven.plugin.MojoExecutionException: Error extracting 
> plugin descriptor: 'No mojo definitions were found for plugin: 
> sample.plugin:hello-maven-plugin.'
>     at 
> org.apache.maven.plugin.plugin.AbstractGeneratorMojo.execute(AbstractGeneratorMojo.java:245)
>     at 
> org.apache.maven.plugin.plugin.DescriptorGeneratorMojo.execute(DescriptorGeneratorMojo.java:92)
>     at 
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
>     at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
>     ... 20 more
> Caused by: 
> org.apache.maven.plugin.descriptor.InvalidPluginDescriptorException: No mojo 
> definitions were found for plugin: sample.plugin:hello-maven-plugin.
>     at 
> org.apache.maven.tools.plugin.scanner.DefaultMojoScanner.populatePluginDescriptor(DefaultMojoScanner.java:126)
>     at 
> org.apache.maven.plugin.plugin.AbstractGeneratorMojo.execute(AbstractGeneratorMojo.java:233)
>     ... 23 more
> {code}
> Am I missing something here?



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