This was staring at me yesterday, and I even commented that "huh,
there's got to be something wrong with the firewall rules, but then
job/kubernetes-e2e-gce/1002/tapResults/ made it obvious: If you have
two e2e jobs running at the same time in the same project (hint:
Jenkins does), they'll race with each other, since resource names are
project scoped.
0918bdbd88