what does it mean with this error when trying to run mvn eclipse:eclipse (Cannot find mojo descriptor for: 'eclipse:eclipse' - Treating as non-aggregator.)

[Rick R]

running mvn eclipse:eclipse used to work.. now I'm getting...

[INFO] Unable to find resource
'org.apache.maven.plugins:maven-eclipse-plugin:maven-plugin:2.8-SNAPSHOT' in
repository codehaus-plugins (http://dist.codehaus.org/)
[INFO] Cannot find mojo descriptor for: 'eclipse:eclipse' - Treating as
non-aggregator.

I'm new to maven and stumped by what is going on?

-- 
Rick R