Maven plugins are not retrieved by Nexus 1.6

[Torsten Friebe]

Any hint how to solve the following issue is welcome.
I use Maven 2.2.1 with Nexus 1.6.0 as an internal repository manager (configured for central repo as a proxy).
The local Maven settings.xml file contains a mirror config as follows:

...
   <mirror>
      <id>nexus</id>
      <mirrorOf>*</mirrorOf> 
      <url>http://localhost:8080/nexus/content/groups/public</url>
    </mirror>
...

Nexus has a Proxy repository configured for Maven central repo with the id "central" (Nexus default settings) and a repository group named "public" with "central" assigned.

Execution of the maven goal
>mvn site
causes an error while Maven is generating the site report:

...
[INFO] Error building POM (may not be this project's POM).

Project ID: org.apache.maven.plugins:maven-javadoc-plugin

Reason: Error getting POM for 'org.apache.maven.plugins:maven-javadoc-plugin' from the repository: Failed to resolve artifact, possibly due to a repository list that is not appropriately equipped for this artifact's metadata.
org.apache.maven.plugins:maven-javadoc-plugin:pom:2.8-SNAPSHOT

from the specified remote repositories:
nexus-local (http://localhost:8080/nexus/content/groups/public)

for project org.apache.maven.plugins:maven-javadoc-plugin


The download of the required dependencies is working as expected. Only the plugins are not retrieved from the internal repository. Any ideas?

[Martijn Verburg]

Have you read the excellent free online guides for Nexus and Maven by Sonatype? I suspect you'll spot the answer in there (hint: I think it's to do with setting up the pluginRepository correctly)

[Torsten Friebe]

Martijn Verburg wrote:Have you read the excellent free online guides for Nexus and Maven by Sonatype? I suspect you'll spot the answer in there (hint: I think it's to do with setting up the pluginRepository correctly)

Sure. And I found what I was looking for. In the Nexus reference book (http://www.sonatype.com/books/nexus-book/reference/), chap. 4.2 gives the answer.
Some more information about plugin Repositories is in the "Maven reference book" (http://www.sonatype.com/books/mvnref-book/reference/public-book.html), chap. 2.9.
Thanks.

[Martijn Verburg]

Great to hear!