[jira] [Created] (MNG-6732) DefaultArtifactDescriptorReader to check IGNORE_MISSING policy upon ArtifactTransferException

["Tomo Suzuki (JIRA)" <ji...@apache.org>]

Tomo Suzuki created MNG-6732:
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             Summary: DefaultArtifactDescriptorReader 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
         Attachments: 62884438-89260580-bd04-11e9-8c4a-897d4b736dc7.png

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.  
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.

 

I will create example Maven projects to compare.

 



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