Comment 4 for bug 1596075

Um, i guess i'm not 100% sure.

this tenant has no networks when i call the heat stack-create. as you can see from the template it has no duplicates. So it must therefore be matching against itself.
Either on one call, or 2 calls that are hitting different api servers @ the same instant. All the api calls here are from heat. I guess some tracing might help.

Its definitely a race condition. E.g. if i make a stack w/ 10 networks, each w/ 1 subnet, it will fail ~1 in 10 (not always the same subnet). If i do it w/ 100 networks, each w/ 1 subnet, it will fail ~90% of the time.