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NPE on site generation #358

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hohwille opened this issue Nov 26, 2019 · 7 comments · Fixed by #373
Closed

NPE on site generation #358

hohwille opened this issue Nov 26, 2019 · 7 comments · Fixed by #373
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@hohwille
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In my project site-generation fails if license-maven-plugin:2.0.0 is configured.

...
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>license-maven-plugin</artifactId>
        <reportSets>
          <reportSet>
            <reports>
              <report>third-party-report</report>
              <report>aggregate-third-party-report</report>
            </reports>
          </reportSet>
        </reportSets>
      </plugin>
     </plugins>
  </reporting>

Stacktrace:

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:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
    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:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
    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)
@hohwille
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hohwille commented Nov 26, 2019 •
edited
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NPE happens here:

license-maven-plugin/src/main/java/org/codehaus/mojo/license/api/ResolvedProjectDependencies.java

Line 50 in d47178b

this.directDependencies = Collections.unmodifiableSet( new HashSet<>( directDependencies ) );

So the provided Set (directDependencies) to make immutable is already null.

@hohwille
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hohwille commented Nov 26, 2019 •
edited
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at org.codehaus.mojo.license.AbstractThirdPartyReportMojo.createThirdPartyDetails (AbstractThirdPartyReportMojo.java:559)

According to your tag license-maven-plugin-2.0.0 this is here:

https://github.com/mojohaus/license-maven-plugin/blob/license-maven-plugin-2.0.0/src/main/java/org/codehaus/mojo/license/AbstractThirdPartyReportMojo.java#L559

@hohwille
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So project.getDependencyArtifacts() was null in my case? Strange...

@hohwille
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Breaking the entire site build with an exception is always bad. However, just tested to downgrade to version 1.20 and the problem is gone. So maybe easy to fix and ship a 2.x.y version.

@hohwille hohwille mentioned this issue Nov 26, 2019
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@planetf1
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I was just about to raise the same issue! Getting exactly the same when trying to build the third party aggregate report - NPE.

@planetf1
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can confirm 1.20 does not exhibit this problem

@Tibor17
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Tibor17 commented Mar 27, 2020

@ppalaga
This trivial NPE should be fixed asap. It is very annoying to see a broken build because of NPE!

tomred-net pushed a commit to tomred-net/license-maven-plugin that referenced this issue Apr 12, 2020
@Wych-Dev
Fix mojohaus#358 NPE on site generation caused by null returned by de…
05905d6 
…precated MavenProject.getDependencyArtifacts()
tomred-net pushed a commit to tomred-net/license-maven-plugin that referenced this issue Apr 12, 2020
@Wych-Dev
Fix mojohaus#358 NPE on site generation caused by null returned by de…
9ed4d9f 
…precated MavenProject.getDependencyArtifacts()
tomred-net pushed a commit to tomred-net/license-maven-plugin that referenced this issue Apr 12, 2020
@Wych-Dev
Fix mojohaus#358 NPE on site generation caused by null returned by de…
c9f09f7 
…precated MavenProject.getDependencyArtifacts()
tomred-net pushed a commit to tomred-net/license-maven-plugin that referenced this issue Apr 12, 2020
@Wych-Dev
Fix mojohaus#358 NPE on site generation caused by null returned by de…
7ec5990 
…precated MavenProject.getDependencyArtifacts()
tomred-net pushed a commit to tomred-net/license-maven-plugin that referenced this issue Apr 12, 2020
@Wych-Dev
Fix mojohaus#358 NPE on site generation caused by null returned by de…
a89989b 
…precated MavenProject.getDependencyArtifacts()
tomred-net pushed a commit to tomred-net/license-maven-plugin that referenced this issue Apr 12, 2020
@Wych-Dev
Fix mojohaus#358 NPE on site generation caused by null returned by de…
1a4b2f0 
…precated MavenProject.getDependencyArtifacts()
tomred-net pushed a commit to tomred-net/license-maven-plugin that referenced this issue Apr 12, 2020
@Wych-Dev
Fix mojohaus#358 NPE on site generation caused by null returned by de…
4df1c16 
…precated MavenProject.getDependencyArtifacts()
@anantk24 anantk24 mentioned this issue Sep 3, 2021
Closed
@anantk24 anantk24 mentioned this issue Sep 12, 2021
Merged
@Carsten-St Carsten-St mentioned this issue Feb 17, 2022
Closed
@slawekjaranowski slawekjaranowski linked a pull request Jul 3, 2023 that will close this issue
Fix #358, #352 NPE on site generation caused by null returned by deprecated MavenProject.getDependencyArtifacts() #373
Merged
slawekjaranowski added a commit that referenced this issue Jul 3, 2023
@tomred-net @slawekjaranowski
Fix #358, #352 NPE on site generation caused by null returned by depr…
c154f0f 
…ecated MavenProject.getDependencyArtifacts() (#373)


Co-authored-by: Dermot Butterfield <[email protected]>
Co-authored-by: Slawomir Jaranowski <[email protected]>
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@Tibor17 @hohwille @slawekjaranowski @planetf1