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https://issues.apache.org/jira/browse/MNG-6732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tomo Suzuki updated MNG-6732:
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Summary: DefaultArtifactDescriptorReader.loadPom to check IGNORE_MISSING
policy upon ArtifactTransferException (was: DefaultArtifactDescriptorReader to
check IGNORE_MISSING policy upon ArtifactTransferException)
> DefaultArtifactDescriptorReader.loadPom to check IGNORE_MISSING policy upon
> ArtifactTransferException
> -----------------------------------------------------------------------------------------------------
>
> Key: MNG-6732
> URL: https://issues.apache.org/jira/browse/MNG-6732
> Project: Maven
> Issue Type: Improvement
> Components: core
> Affects Versions: 3.6.1
> Reporter: Tomo Suzuki
> Priority: Major
> Attachments: 62884438-89260580-bd04-11e9-8c4a-897d4b736dc7.png
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> h1. Problem
> Sometimes my Maven enforcer rule does not receive resolved artifact list
> because of missing artifact even when the missing artifact does not appear in
> the final dependency graph.
> h1. Background
> Artifact xerces:xerces-impl:2.6.2 is not published in Maven Central.
> My enforcer rule can retrieve artifact list when applied to
> [https://github.com/suztomo/spring-cloud-gcp/tree/v1.1.2-linkage-checker]
> project even though it outputs "[WARNING] The POM for
> xerces:xerces-impl:jar:2.6.2 is missing, no dependency information available".
> On the other hand, the enforcer rule fails to retrieve artifact list when
> applied to
> [grpc-java-by-example/chat-example/chat-vaadin-client|https://github.com/saturnism/grpc-java-by-example/tree/master/chat-example/chat-vaadin-client]
> because of the missing xerces:xerces-impl:2.6.2.
>
> [https://github.com/GoogleCloudPlatform/cloud-opensource-java/issues/834]
> h1. Diagnosis
> Currently DefaultArtifactDescriptorReader.loadPom method checks
> "ArtifactDescriptorPolicy.IGNORE_MISSING" policy upon
> ArtifactNotFoundException. This allows
> DefaultProjectDependenciesResolver.resolve calls
> repoSystem.resolveDependencies to obtain partially resolved artifact list
> even when there is a missing artifact (such as xerces:xerces-impl:2.6.2)
> However, when there is a retired Maven repository is involved (such as
> [http://repository.codehaus.org/] ), DefaultArtifactDescriptorReader.loadPom
> method throws ArtifactDescriptorException without checking
> "ArtifactDescriptorPolicy.IGNORE_MISSING" policy, and thus
> DefaultProjectDependenciesResolver.resolve does not return partially resolved
> artifact list.
>
> Example project to demonstrate the diagnosis:
> [https://github.com/suztomo/maven-missing-artifact] . Even though module-b
> and module-c have the same dependency section, module-c fails to run Maven
> because of repository section.
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