Comment 17 for bug 1491131

I would agree with the adding a sanity check on ipset delete. If we remove an ipset that doesn't exist, then we should specifically catch that error and treat it as a success in that case - because the desired end state has already been reached. At a minimum we should only attempt to apply this change a few time. I see a change for the OVS agent, but this also seems to impact the linux bridge agent as well.