Github user mlsorensen commented on the pull request:
https://github.com/apache/cloudstack/pull/211#issuecomment-97474185
I haven't researched this fix extensively. However, I just want to make
sure that the alert state is not accompanied by any undesirable behavior.
Moving the hypervisors to alert state to warn the admin is fine, but we don't
want to assume that anything actually went down. In the scenario given, it is
probably more likely that there was a break in the network between the
hypervisors and mgmt server, and VMs are running fine, so as long as we are
accounting for that scenario during recovery from alert state and not assuming
the VMs are down we should be good.
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