I was debugging a repository issue with a maven project, and noticed that the pom based repository was being mirrored by Maven Central.
I found this section in my ~/.m2/settings.xml file: <mirrors> <mirror> <id>maven-central</id> <url>https://repo1.maven.org/maven2/</url> <mirrorOf>*,!eclipselink.repository,!jvnet-nexus-promoted,!netbeans.repository</mirrorOf> </mirror> </mirrors> Looking over the settings.xml file, it appears that this is entirely a NetBeans construct. (I have no memory of tweaking settings.xml myself). Does NB install/update a local settings.xml? When does it do this?