[IVY-831] NPE in AbstractResolver.exists() if a resource cannot be found

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0-RC1
• Fix Version/s: 2.0-RC1
• Component/s: Core
• Assignee: Xavier Hanin
• Reporter: Erik-Berndt Scheper
• Created: 10/Jun/08 10:24
• Updated: 12/Jun/08 07:17
• Resolved: 10/Jun/08 17:09

Description

A NullPointerException occurs inAbstractResolver.exists(AbstractResolver.java:196) if a host cannot be found

Reproducible with "ant coverage-report" behind a firewall with proxy install disabled.
Resulting stack trace:

java.lang.NullPointerException
at org.apache.ivy.plugins.resolver.AbstractResolver.exists(AbstractResolver.java:196)
at org.apache.ivy.plugins.parser.m2.PomModuleDescriptorParser.addSourcesAndJavadocArtifactsIfPresent(PomModuleDescriptorParser.java:267)
at org.apache.ivy.plugins.parser.m2.PomModuleDescriptorParser.parseDescriptor(PomModuleDescriptorParser.java:246)
at org.apache.ivy.plugins.parser.m2.PomModuleDescriptorParser.parseDescriptor(PomModuleDescriptorParser.java:104)
at org.apache.ivy.plugins.parser.m2.PomModuleDescriptorParserTest.testSimple(PomModuleDescriptorParserTest.java:89)

Offending code:

    /**
     * Default implementation actually download the artifact Subclasses should overwrite this to
     * avoid the download
     */
    public boolean exists(Artifact artifact) {
        DownloadReport dr = download(new Artifact[] {artifact}, new DownloadOptions());
        ArtifactDownloadReport adr = dr.getArtifactReport(artifact);
        return adr.getDownloadStatus() != DownloadStatus.FAILED;
    }

If the DownloadReport instance is null, a NPE occurs

Issue Links

• relates to: IVY-832 Ivy build system: fix build.xml to allow "ant coverage-report" behind a proxy