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I have the same problem. However, using the java.net Maven2 Repository cannot solve it, since this is the place where the reference to ocean.net.au repository comes from: http://download.java.net/maven/2/org/glassfish/maven/plugin/maven-glassfish-plugin/2.1/maven-glassfish-plugin-2.1.pom Maybe they should change their .pom?
I guess you're using org.glassfish.maven.plugin:maven-glassfish-plugin:2.2-SNAPSHOT which declares indeed http://maven.ocean.net.au/snapshot as snapshot repository.
My suggestion would be to use a released version of the plugin e.g. version 2.1 (released versions of this plugin are hosted in the java.net Maven2 Repository) or to patch and deploy a version 2.2 to your internal corporate repository (i.e. don't use a snapshot from the Ocean Maven2 Snapshot Repository).