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I have seen something like this before with nova-network and it was due to the number of requests the rpc call timeout gets hit for allocate_network. You might need to set your rpc_response_timeout to something greater. I think it defaults to 60 seconds.

Vish

On Jun 25, 2014, at 6:57 AM, tfreger at redhat.com wrote:

> Hello,
> 
> During the tests of Multiple RPC, I've encountered a problem to create VMs.
> Creation of 180 VMs succeeded.
> 
> But when I've tried to create 200 VMs, part of the VMs failed with resources problem of VCPU limitation, the other part failed with following error:
> vm failed -  {"message": "Virtual Interface creation failed", "code": 500, "created": "2014-06-25T10:22:35Z"} | | flavor | nano (10)   
> 
> We can see from the Neutron server and Nova API logs, that Neutron got the Nova request and responded to it, but this connection fails somewhere between Nova API and Nova Compute.
> 
> Please see the exact logs: http://pastebin.test.redhat.com/217653
> 
> 
> Tested with latest Icehouse version on RHEL 7.
> Controller + Compute Node
> 
> All Nova and Neutron logs are attached.
> 
> Is this a known issue?
> -- 
> Thanks,
> Toni
> <multiple_vm_neutron_log.tar.gz><multiple_vm_nova_log.tar.gz>_______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev

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