Eclipse 3.7.2, Glassfish 3.1.2, Oracle GlassFish Server Tools 184.108.40.206205030900
When port 8080 is already in use when starting GlassFish via Eclipse it will display the following message:
The Eclipse plugin cannot communicate with the GlassFish server, status is :CREDENTIAL_ERROR
It seems this message is wrong, or at least misleading. It lets the user to believe the problem is with the username/password settings, while in fact the root problem is a port that's already in use.
Fixed. The update can be found on http://download.java.net/glassfish/eclipse/indigo[juno] update sites. See http://blogs.oracle.com/roller-ui/authoring/preview/piotrik/?previewEntry=glassfish_3_1_2_2.