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

[Erik-Berndt Scheper (JIRA)]

NPE in AbstractResolver.exists() if a resource cannot be found
--------------------------------------------------------------

                 Key: IVY-831
                 URL: https://issues.apache.org/jira/browse/IVY-831
             Project: Ivy
          Issue Type: Bug
          Components: Core
    Affects Versions: 2.0-RC1
            Reporter: Erik-Berndt Scheper
             Fix For: 2.0-RC1


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:

{noformat}
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)
{noformat}

Offending code:
{noformat}
    /**
     * 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;
    }
{noformat}

If the DownloadReport instance is null, a NPE occurs


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