Nexus 2.14 not downloading from Central

Ben Tatham

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May 11, 2018, 8:29:18 AM5/11/18

to Nexus Users

Version: Nexus 2.14.8-01

I recently deployed some new artifacts to Maven Central (my first time), and Nexus won't download the pom artifacts, but it will download the jars themselves. This seems very strange.

It seems that the Maven Central index does contain my jar files, but not the pom files for my projects (maven plugins). So oddly, my local corporate nexus can download the jar files, but not the poms, which means I still can't use my new artifacts from Maven Central via my Nexus. I waited a full week to ensure the maven central weekly index update occurred (would be nice to know when during the week that was), but still doesn't work.

Is Nexus supposed to block download of files that are not in the remote index? How can I force this to happen?

Summary of what I can see:

- I can see the pom files in Maven Central itself: http://repo1.maven.org/maven2/ca/nanometrics/maven/plugins/testtime-maven-plugin/1.0.0/

- I can see the jar files when exploring the Maven Central index in my local Nexus, but not the poms:

- I can see all the artifacts for the same directory when I browse remote:

Thanks,

Ben

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Ben Tatham

Principle Software Developer
Nanometrics

P: +1 613 505 5065
bent...@nanometrics.ca

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Damian Bradicich

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May 11, 2018, 9:39:31 AM5/11/18

to Ben Tatham, Nexus Users

Just to note, the 'Browse Index' tab isn't always a representation of what is actually on disk that a maven client could retrieve, its simply an index of that data used for searching/browsing. Have a look at the 'Browse Storage' tab and see if the pom file is located where you would expect. If it's not, I would expect some failure when trying to retrieve that content from the proxy repository which should show up when you do a ?describe type request, i.e.

https://(your-repo-url)/content/repositories/(your-repo-id)/ca/nanometrics/maven/plugins/testtime-maven-plugin/1.0.0/testtime-maven-plugin-1.0.0.pom?describe

That will you give some detailed information about the request processing

Also note that I do recall issues in nxrm 2 where an index entry for a pom could be overwritten by an index entry for the jar if handled in certain order i.e. https://issues.sonatype.org/browse/NEXUS-6674

Hope that helps

Damian

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Ben Tatham

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May 14, 2018, 1:39:33 PM5/14/18

to Damian Bradicich, Nexus Users

Thanks, Damian. After more investigation (and trying to rebuild/redo stuff as described above) the problems seems to be between Nexus repositories and groups.

I still get this in Maven output:

$ mvn validate -U

[INFO] Scanning for projects...

Downloading from releases: http://(my-repo-host)/nexus/content/groups/public/ca/nanometrics/maven/common-pom-java8/8.1.25-SNAPSHOT/maven-metadata.xml

Downloading from releases: http://(my-repo-host)/nexus/content/groups/public/ca/nanometrics/maven/common-pom/8.1.25-SNAPSHOT/maven-metadata.xml

Downloading from releases: http://(my-repo-host)/nexus/content/groups/public/ca/nanometrics/maven/nmx-pom/8.1.25-SNAPSHOT/maven-metadata.xml

Downloading from releases: http://(my-repo-host)/nexus/content/groups/public/ca/nanometrics/maven/plugins/testtime-maven-extension/1.0.0/testtime-maven-extension-1.0.0.pom

[WARNING] The POM for ca.nanometrics.maven.plugins:testtime-maven-extension:jar:1.0.0 is missing, no dependency information available

Downloading from releases: http://(my-repo-host)/nexus/content/groups/public/ca/nanometrics/maven/plugins/testtime-maven-extension/1.0.0/testtime-maven-extension-1.0.0.jar

[ERROR] [ERROR] Some problems were encountered while processing the POMs:

[ERROR] Unresolveable build extension: Plugin ca.nanometrics.maven.plugins:testtime-maven-extension:1.0.0 or one of its dependencies could not be resolved: Could not find artifact ca.nanometrics.maven.plugins:testtime-maven-extension:jar:1.0.0 in releases (http://(my-repo-host)/nexus/content/groups/public) @

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