If the Services window is not visible, on the NetBeans IDE menubar choose Window -> Services.
In the Services window, expand the Servers node.
The Servers node should contain a GlassFish V2 subnode. If the GlassFish V2 node is not visible, see To Register the GlassFish V2 Application Server with the NetBeans IDE.
If a green arrow icon appears on the GlassFish V2 node, the server is running. If you do not see a green arrow icon, see To Start the GlassFish V2 Application Server in the NetBeans IDE.