[Openstack] nova list --all-tenants fails, nova sends bad request to neutron

Teun Docter teun.docter at brightcomputing.com
Tue Nov 18 14:27:25 UTC 2014 

Hello,

I'm struggling with what seems like a nova problem on an Icehouse RDO 
deployment. As an admin, I wanted to list all instances, but nova gives 
me an error:

# nova list --all-tenants
ERROR: The server has either erred or is incapable of performing the 
requested operation. (HTTP 500) (Request-ID: 
req-9564f90e-e3db-4b2d-90a8-16bc7e7408c2)

Upon investigating the debug logs, I noticed that nova seems to be 
making a request to neutron, but gets a status 400. It seems that nova 
includes the device_id's of all instances in the request to neutron.

It looks something like this in the nova logs:

OpenStack[nova:31337] DEBUG: REQ: curl -i 
http://master:9696//v2.0/ports.json?device_id=fab4dac9-2de5-478b-be92-2a9f8694e6f6&device_id=5b87a0f4-2d6e-4161-bc5a-0f31a373e893& 
<~150 more ID's here>  -X GET -H "X-Auth-Token: <token data>" -H 
"Content-Type: application/json" -H "Accept: application/json" -H 
"User-Agent: python-neutronclient" [-] http_log_req 
/usr/lib/python2.6/site-packages/neutronclient/common/utils.py:173
OpenStack[nova:31337] DEBUG: RESP:{'status': '400', 'connection': 
'close', 'content-type': 'text/html', 'cache-control': 'no-cache'} 
<html><body><h1>400 Bad request</h1>
Your browser sent an invalid request.
</body></html> [-] http_log_resp 
/usr/lib/python2.6/site-packages/neutronclient/common/utils.py:179

Things have been working fine with smaller amounts of instances on the 
system.

What I've found is that the same error occurs when I use the python nova 
API and don't specify pagination. With a pagination limit of 80, the 
error does not occur. However with a limit of 81 it does cause this 
error. I'm wondering where this limit of 80 instances comes from though.

All of the above leads me to believe this might be a bug in nova that 
causes it to generate a bad (to large?) request to neutron? Or does this 
point to some sort of configuration issue?

Best regards,
Teun Docter

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