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note on the possibility of duplicate alerts #487

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8 changes: 8 additions & 0 deletions source/adminguide/events.rst
Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,14 @@ machine on the event bus. All the CloudStack events (alerts, action
events, usage events) and the additional category of resource state
change events, are published on to the events bus.

.. note::
Alerts for some more important events will be send multiple
times for the same event. This is due to the nature of guarding
certain resources from multiple threads in the code, to make sure
that events are not missed. Examples are "Host down" or
"HA starting VM". These are considered to important to not send
immediately and hence a check if they are queued can not be done.

Implementations
~~~~~~~~~~~~~~~
An event bus is introduced in the
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