I'd been working with Eclipse Kepler. I had several Maven projects
there. I connected to Maven Central through a corporate Nexus
repository. Everything worked just fine.
Then I got Eclipse Luna and installed it. Using the SAME workspace,
with the same maven settings.xml that had the settings for the Nexus
repository, I find that all Maven projects show errors that cannot be
resolved by running Maven->Update. All mention something about
connections being refused by Maven Central.
I closed Eclipse Luna and restarted Kepler on the same workspace. (I was
never running them simultaneously). The same errors appeared, but now
Maven->Update was successful in resolving them.
I closed Kepler and restarted Luna on the same workspace. Once again,
the errors returned, and were not resolvable by Maven->Update.
Here is one of the errors:
CoreException: Could not get the value for parameter compilerId for
plugin execution default-compile: PluginResolutionException: Plugin
org.apache.maven.plugins:maven-compiler-plugin:3.1 or one of its
dependencies could not be resolved: The following artifacts could not be
resolved: org.apache.maven:maven-plugin-api:jar:2.0.9,
org.apache.maven:maven-artifact:jar:2.0.9: Failure to transfer
org.apache.maven:maven-plugin-api:jar:2.0.9 from
http://mavencentral.it.whatever.com:8084/nexus/content/groups/whatever-public-group
<http://mavencentral.it.att.com:8084/nexus/content/groups/att-public-group>was
cached in the local repository, resolution will not be reattempted until
the update interval of nexus has elapsed or updates are forced. Original
error: Could not transfer artifact
org.apache.maven:maven-plugin-api:jar:2.0.9 from/to nexus
(http://mavencentral.it.whatever.com:8084/nexus/content/groups/whatever-public-group
<http://mavencentral.it.att.com:8084/nexus/content/groups/att-public-group>):
Connection refused: connect
What might the problem be?
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