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https://issues.apache.org/jira/browse/MNG-7544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17607705#comment-17607705
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ASF GitHub Bot commented on MNG-7544:
-------------------------------------
laeubi commented on PR #805:
URL: https://github.com/apache/maven/pull/805#issuecomment-1253595052
@michael-o do you think something like this is feasible? Or should one
simply fall back to empty list if there is no project?
> MavenMetadataSource.retrieve(MetadataResolutionRequest) do not check for null
> when reading from project map
> -----------------------------------------------------------------------------------------------------------
>
> Key: MNG-7544
> URL: https://issues.apache.org/jira/browse/MNG-7544
> Project: Maven
> Issue Type: Bug
> Reporter: Christoph Läubrich
> Priority: Major
>
> At Tycho we see
> {code:java}
> [ERROR] Internal error: java.lang.NullPointerException: Cannot invoke
> "org.apache.maven.project.MavenProject.getRemoteArtifactRepositories()"
> because "project" is null -> [Help 1]
> org.apache.maven.InternalErrorException: Internal error:
> java.lang.NullPointerException: Cannot invoke
> "org.apache.maven.project.MavenProject.getRemoteArtifactRepositories()"
> because "project" is null
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:120)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:960)
> 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:77)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:568)
> 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: Cannot invoke
> "org.apache.maven.project.MavenProject.getRemoteArtifactRepositories()"
> because "project" is null
> at org.apache.maven.project.artifact.MavenMetadataSource.retrieve
> (MavenMetadataSource.java:200)
> at
> org.apache.maven.repository.legacy.resolver.DefaultLegacyArtifactCollector.recurse
> (DefaultLegacyArtifactCollector.java:551)
> at
> org.apache.maven.repository.legacy.resolver.DefaultLegacyArtifactCollector.collect
> (DefaultLegacyArtifactCollector.java:148)
> at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve
> (DefaultArtifactResolver.java:504)
> at org.apache.maven.repository.legacy.LegacyRepositorySystem.resolve
> (LegacyRepositorySystem.java:367)
> at
> org.eclipse.tycho.osgi.configuration.MavenDependenciesResolverConfigurer.resolve
> (MavenDependenciesResolverConfigurer.java:106)
> at org.eclipse.tycho.core.shared.MavenDependenciesResolver.resolve
> (MavenDependenciesResolver.java:58)
> at org.eclipse.tycho.p2.resolver.MavenTargetDefinitionContent.<init>
> (MavenTargetDefinitionContent.jav
> {code}
> This is because MavenMetadataSource assumes that if the model is read from a
> workspace model reader there is *always* a reactor project in the sessions
> project map, but this is not always true.
> An obvious fix would be to simply assume there are no pomRepositories in such
> a case, or even query the Model itself with model.getRepositories()
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