mvn site plugin fails with an NPE on license report generation #68

karianna · 2021-08-31T19:26:08Z

To reproduce uncomment the license plugin in the reporting section and run mvnw site

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-site-plugin:3.7.1:site (default-site) on project gctoolkit: Execution default-site of goal org.apache.maven.plugins:maven-site-plugin:3.7.1:site failed.: NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-site-plugin:3.7.1:site (default-site) on project gctoolkit: Execution default-site of goal org.apache.maven.plugins:maven-site-plugin:3.7.1:site failed.
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-site of goal org.apache.maven.plugins:maven-site-plugin:3.7.1:site failed.
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:148)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: java.lang.NullPointerException
    at java.util.HashSet.<init> (HashSet.java:119)
    at org.codehaus.mojo.license.api.ResolvedProjectDependencies.<init> (ResolvedProjectDependencies.java:50)
    at org.codehaus.mojo.license.AbstractThirdPartyReportMojo.createThirdPartyDetails (AbstractThirdPartyReportMojo.java:559)
    at org.codehaus.mojo.license.AggregatorThirdPartyReportMojo.createThirdPartyDetails (AggregatorThirdPartyReportMojo.java:127)
    at org.codehaus.mojo.license.AbstractThirdPartyReportMojo.executeReport (AbstractThirdPartyReportMojo.java:420)
    at org.apache.maven.reporting.AbstractMavenReport.generate (AbstractMavenReport.java:251)
    at org.apache.maven.plugins.site.render.ReportDocumentRenderer.renderDocument (ReportDocumentRenderer.java:230)
    at org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.render (DefaultSiteRenderer.java:349)
    at org.apache.maven.plugins.site.render.SiteMojo.renderLocale (SiteMojo.java:198)
    at org.apache.maven.plugins.site.render.SiteMojo.execute (SiteMojo.java:147)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
    ```

The text was updated successfully, but these errors were encountered:

brunoborges · 2021-09-01T18:57:07Z

@karianna I just did a mvn site:site -Pcontributor locally and it all worked.

karianna · 2021-09-01T20:27:44Z

Did you uncomment the license plugin report? :-)

brunoborges · 2021-09-01T21:00:58Z

I never thought it was commented out! Maybe a detail missed from this issue report :-D

karianna · 2021-09-01T21:02:46Z

It was a trap to be fair :-)

brunoborges · 2021-09-01T21:27:26Z

Stop with the line-ending emojis! :-D

anantk24 · 2021-09-03T12:22:10Z

I would like take this up . Assign this to me.

karianna · 2021-09-03T12:28:25Z

The myclin license plugin might be a better option here...

anantk24 · 2021-09-03T18:37:06Z

Downgrading jars version <maven.license-plugin.version>1.20</maven.license-plugin.version> to works for me after uncommenting it. Refer here for details. Should I go ahead by downgrading version?

karianna · 2021-09-03T18:53:47Z

Downgrading jars version <maven.license-plugin.version>1.20</maven.license-plugin.version> to works for me after uncommenting it. Refer here for details. Should I go ahead by downgrading version?

Looks like the active maintenance on that project is pretty poor - could you give https://github.com/mathieucarbou/license-maven-plugin a try?

anantk24 · 2021-09-08T18:27:15Z

Hi @karianna ,
I tried this executing locally, what documentation is suggesting that, it will either check , update , remove file headers based on license type. Same is happening when executed it. Ref.
Correct me if I am wrong, if we include it later, it has nothing to do with mvn site.
we will have goals to update license text in file headers.

karianna · 2021-09-09T11:47:09Z

Hi @karianna ,
I tried this executing locally, what documentation is suggesting that, it will either check , update , remove file headers based on license type. Same is happening when executed it. Ref.
Correct me if I am wrong, if we include it later, it has nothing to do with mvn site.
we will have goals to update license text in file headers.

Yes, you're correct, it is the wrong type of license checking.

I think the next steps are:

Downgrade the plugin
2.Get onto the mailing list of the maven license plugin from codehaus and see if any active maintainers are willing to help us fix the issue and get a release of 2.0.1 out.

anantk24 · 2021-09-12T11:09:13Z

Added pull request #91

karianna · 2023-07-05T22:17:55Z

2.2.0 plugin fixes this, I'll PR in a fix later

karianna added bug Something isn't working help wanted Extra attention is needed labels Aug 31, 2021

karianna assigned anantk24 Sep 3, 2021

karianna closed this as completed Sep 13, 2021

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mvn site plugin fails with an NPE on license report generation #68

mvn site plugin fails with an NPE on license report generation #68

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mvn site plugin fails with an NPE on license report generation #68

mvn site plugin fails with an NPE on license report generation #68

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