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https://issues.apache.org/jira/browse/MNG-5993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17069657#comment-17069657
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Hudson commented on MNG-5993:
-----------------------------
Build failed in Jenkins: Maven TLP » maven-studies » maven-metrics #4
See
https://builds.apache.org/job/maven-box/job/maven-studies/job/maven-metrics/4/
> Confusing error message in case of missing/empty artifactId and version in
> pluginManagement
> -------------------------------------------------------------------------------------------
>
> Key: MNG-5993
> URL: https://issues.apache.org/jira/browse/MNG-5993
> Project: Maven
> Issue Type: Improvement
> Components: Dependencies
> Affects Versions: 3.3.9
> Reporter: Konrad Windszus
> Assignee: Karl Heinz Marbaise
> Priority: Major
> Fix For: 3.5.0-alpha-1, 3.5.0
>
>
> Executing any goals/phases on this pom.xml leads to a weird error
> {code}
> <project xmlns="http://maven.apache.org/POM/4.0.0";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
> http://maven.apache.org/xsd/maven-4.0.0.xsd";>
> <modelVersion>4.0.0</modelVersion>
> <groupId>com.example.group</groupId>
> <artifactId>testinvalidpom</artifactId>
> <version>0.0.1-SNAPSHOT</version>
>
> <build>
> <pluginManagement>
> <plugins>
> <plugin>
> <groupId></groupId>
> </plugin>
> </plugins>
> </pluginManagement>
> </build>
> </project>
> {code}
> The error being emitted is
> {code}
> [ERROR] Error resolving version for plugin ':null' from the repositories
> [local (<some path>), nexus (<some remote repo url>)]: Plugin not found in
> any plugin repository -> [Help 1]
> {code}
> Even with debug you only see something like this
> {code}
> [ERROR] Error resolving version for plugin ':null' from the repositories
> [...]: Plugin not found in any plugin repository -> [Help 1]
> org.apache.maven.plugin.version.PluginVersionResolutionException: Error
> resolving version for plugin ':null' from the repositories [local
> (/Users/konradwindszus/.m2/repository), nexus
> (https://repo.int.netcentric.biz/nexus/content/groups/public/)]: Plugin not
> found in any plugin repository
> at
> org.apache.maven.plugin.version.internal.DefaultPluginVersionResolver.selectVersion(DefaultPluginVersionResolver.java:236)
> at
> org.apache.maven.plugin.version.internal.DefaultPluginVersionResolver.resolveFromRepository(DefaultPluginVersionResolver.java:148)
> at
> org.apache.maven.plugin.version.internal.DefaultPluginVersionResolver.resolve(DefaultPluginVersionResolver.java:96)
> at
> org.apache.maven.lifecycle.internal.LifecyclePluginResolver.resolveMissingPluginVersions(LifecyclePluginResolver.java:89)
> at
> org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateExecutionPlan(DefaultLifecycleExecutionPlanCalculator.java:116)
> at
> org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateExecutionPlan(DefaultLifecycleExecutionPlanCalculator.java:135)
> at
> org.apache.maven.lifecycle.internal.builder.BuilderCommon.resolveBuildPlan(BuilderCommon.java:97)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:109)
> 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:120)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:582)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
> 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)
> {code}
> In this example the error is easy to spot, but for bigger pom.xmls with more
> complex hierarchies it is very hard.
> Some basic validation should take place that on the merged pom.xml all of
> groupId, artifactId and version is available and if that is not the case, the
> line number of the pom.xml together with the filename should be given out,
> where the according information is missing.
> A similar error is emitted in case the groupId element is missing as well or
> there is an empty artifactId.
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