Created attachment 796019 [details]
log

Description of problem:

I tried running 100 very large flavoured instances which will of course could not be run. 
the error we see in the UI is 

Error: Quota exceeded for cores,instances,ram: Requested 800, but already used 0 of 20 cores (HTTP 413) (Request-ID: req-0c854c89-89d9-48ce-96e2-eca07bbbc8f5)

This message is unclear since I was trying to run 100 instances (not 800) so it's probably the ram and also, if 0 out of 20 are used, I should be able to run instances. 

looking at the log I can see that there is another error which makes a lot more scene: 

tried to run 100 instances. Can only run 2 more instances of this type.

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

havana python-django-horizon-2013.1.3-2.el6ost.noarch
installed on rhel6

How reproducible:

100%

Steps to Reproduce:
1. install AIO and try to run a large number of instances with the largest flavor
2.
3.

Actual results:

we get the following unclear error: 

Error: Quota exceeded for cores,instances,ram: Requested 800, but already used 0 of 20 cores (HTTP 413) (Request-ID: req-0c854c89-89d9-48ce-96e2-eca07bbbc8f5)


Expected results:

I think the second message from the logs will be clearer: 

HTTP exception thrown: Quota exceeded for cores,instances,ram: Requested 800, but already used 0 of 20 cores


Additional info: full api log