If we set E2E_UPGRADE_TESTS_SERVING_USE to true, eventing installed by operator will end up with the following test case failing:
=== FAIL: test/upgrade TestContinuousEventsPropagationWithProber (177.16s)
test_runner.go:151: namespace is : "test-continuous-events-propagation-with-prober-lmddv"
2020-10-06T03:05:50.261Z INFO prober/prober.go:140 Using namespace for probe testing: test-continuous-events-propagation-with-prober-lmddv
creation.go:294: Creating v1beta1 broker default
2020-10-06T03:05:50.394Z INFO prober/configuration.go:78 Deploying config map: "test-continuous-events-propagation-with-prober-lmddv/wathola-config"
2020-10-06T03:05:50.395Z DEBUG prober/configuration.go:61 Fetching default broker URL for ns test-continuous-events-propagation-with-prober-lmddv
2020-10-06T03:05:51.589Z DEBUG prober/configuration.go:72 default broker URL for ns test-continuous-events-propagation-with-prober-lmddv is http://broker-ingress.knative-eventing.svc.cluster.local/test-continuous-events-propagation-with-prober-lmddv/default
creation.go:253: Creating configmap wathola-config
creation.go:329: Creating v1beta1 trigger wathola-trigger-step
creation.go:329: Creating v1beta1 trigger wathola-trigger-finished
2020-10-06T03:05:51.886Z INFO prober/receiver.go:42 Deploy of receiver pod: wathola-receiver
2020-10-06T03:05:52.001Z INFO prober/receiver.go:94 Deploy of receiver service: wathola-receiver
2020-10-06T03:05:52.259Z DEBUG prober/receiver.go:129 Node port for service: wathola-receiver is 30152
2020-10-06T03:05:52.259Z INFO prober/forwarder.go:36 Deploy forwarder knative service: wathola-forwarder
tracker.go:153: Waiting for all KResources to become ready
2020-10-06T03:06:44.370Z INFO prober/sender.go:32 Deploy sender pod: wathola-sender
2020-10-06T03:06:44.478Z INFO lib/await.go:44 Wait for receiver be ready: wathola-receiver
2020-10-06T03:06:44.478Z INFO lib/await.go:44 Wait for forwarder ksvc be ready: wathola-forwarder
2020-10-06T03:06:44.478Z INFO lib/await.go:44 Wait for forwarder scales to zero: wathola-forwarder
2020-10-06T03:06:44.478Z INFO lib/await.go:44 Wait for sender pod be ready: wathola-sender
2020-10-06T03:06:44.489Z INFO lib/await.go:51 Successful wait for receiver be ready: wathola-receiver, took 10.97592ms to complete
2020-10-06T03:06:44.506Z INFO lib/await.go:51 Successful wait for forwarder ksvc be ready: wathola-forwarder, took 27.885287ms to complete
2020-10-06T03:06:47.513Z INFO lib/await.go:51 Successful wait for sender pod be ready: wathola-sender, took 3.035237442s to complete
2020-10-06T03:08:44.603Z ERROR lib/await.go:49 Error while waiting for forwarder scales to zero: wathola-forwarder: timed out waiting for the condition
knative.dev/eventing/test/lib.AwaitForAll.func1
/home/prow/go/src/knative.dev/eventing/test/lib/await.go:49
golang.org/x/sync/errgroup.(*Group).Go.func1
/home/prow/go/src/knative.dev/eventing/vendor/golang.org/x/sync/errgroup/errgroup.go:57
test_runner.go:196: EVENT: {{ } {default-wathola-trigger-finishe1adc8afcde3df4ad058859184634d4ad.163b484e0f499a45 test-continuous-events-propagation-with-prober-lmddv /api/v1/namespaces/test-continuous-events-propagation-with-prober-lmddv/events/default-wathola-trigger-finishe1adc8afcde3df4ad058859184634d4ad.163b484e0f499a45 8a32f312-a820-4ab1-b8b6-00fe67f266e7 1437 0 2020-10-06 03:06:32 +0000 UTC <nil> <nil> map[] map[] [] [] []} {Subscription test-continuous-events-propagation-with-prober-lmddv default-wathola-trigger-finishe1adc8afcde3df4ad058859184634d4ad 7430f529-248f-4f48-a677-d26c4f199e32 messaging.knative.dev/v1 25187 } FinalizerUpdate Updated "default-wathola-trigger-finishe1adc8afcde3df4ad058859184634d4ad" finalizers {subscription-controller } 2020-10-06 03:06:32 +0000 UTC 2020-10-06 03:06:32 +0000 UTC 1 Normal 0001-01-01 00:00:00 +0000 UTC nil nil }
tracker.go:137: Waiting for wathola-trigger-step to be deleted
tracker.go:131: Cleaning resource: "wathola-config"
tracker.go:137: Waiting for wathola-config to be deleted
tracker.go:131: Cleaning resource: "default"
tracker.go:137: Waiting for default to be deleted
panic: unexpected error: timed out waiting for the condition [recovered]
panic: unexpected error: timed out waiting for the condition
[signal SIGSEGV: segmentation violation code=0xc000942878 addr=0x5821b5 pc=0xcac826]
If we set E2E_UPGRADE_TESTS_SERVING_USE to true, eventing installed by operator will end up with the following test case failing: