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I'm running a havana install, and during some testing I've managed to 
get the system into a state where two instances are up and running but 
are reporting a task_state of REBOOTING.

I can see the nova-api logs showing the soft-reboot request.  I don't 
see a corresponding nova-compute log indicating a successful reboot or 
an error.  I see a subsequent nova-api log for a requested soft-reboot 
that gets a 409 response, presumably because it thinks it's still rebooting.

Has anyone seen something like this before?

I'm a bit surprised that there isn't an audit that cleans this up. 
They've been sitting like this for hours.  Does that count as a bug? 
Presumably a power state of "RUNNING" should be enough to clear the 
task_state.

Chris