Example would be deleting a .ear archive, will remove the archive from disk, remove the ear resource from the inventory, but leave the stateless session bean resources (that were contained in the .ear) still in the inventory. These resources turn red since their actual deployment (inside the .ear archive) no longer exists.

The trouble is there is no real association between the ear resource and the SLSB resource to indicate that the SLSB should be removed too.