Normally the redirect_facet property is used to specify where the user should be redirected to when there's a problem with the facet he's trying to open. This is mainly used to redirect the user back to the search page when the entry he's trying to open doesn't exist. However, some issues may crop up when there's a problem with the server:

1. The redirect_facet is defined in the entity. That means all facets belonging to this entity will have the same behavior. If there's a problem in the search facet itself (e.g. internal error), the user will be redirected back to the search facet again only to get the same error. In this case the redirect_facet should have been defined in the facet instead of the entity so different facets can have different redirection (or no redirection).

2. If the server has an internal error that affects all facets (e.g. directory server down), the user will get the error twice: one from the facet itself, and another from the facet he's redirected to. In this case the UI should check the type of the error before redirecting the user.