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Description of problem:
When I visit the web site, it says a few of my machines that have been down for
the past few days need immediate update.  I have already scheduled the updates
of the corresponding errata, but the only place where this fact is displayed is
in the schedule web page.  It would be nice if it would decrease the `alert
level´ for a machine as soon as the updates are scheduled, but it should only
get back to normal when they're actually installed.  I imagine the System
Overview web page, as well as the top-level Errata and System Set Manager ->
Errata, could display not only the list of relevant errata, but also the number
of systems for which the errata install has not been scheduled.

Ideally, RHN would refuse to schedule a task (or at least warn about it) if
there's an identical task already scheduled for the same server, otherwise, if
you run rhn_check by hand on the client, you get messages that the requested
packages were already installed or so for every duplicate.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.Schedule some updates for systems that are down, so that they're installed
when the system comes back up
2.A few days go by, and you visit the web page again, and see a number of
pending errata, so you schedule all updates again
3.When the server comes back up, you're impatient and run rhn_check by hand
    

Actual Results:  You get an `error´ message from rhn_check for every update
scheduled more than once.

Expected Results:  The RHN web pages should warn in advance, or even prevent,
the duplicate scheduling of tasks.  In particular, the default behavior should
not be of creating duplicates, but rather of scheduling actions only for systems
that don't have the action already scheduled.

Additional info: