TestTriggerDependencyAnnotation fails

[LiYa-Xu]

Describe the bug
TestTriggerDependencyAnnotation is failing consistently.

Expected behavior
test should pass

To Reproduce

test fails consistently with:
    tracker.go:136: Waiting for subscriber-annotation to be deleted

FAIL

FAIL	knative.dev/eventing/test/e2e	403.593s

FAIL

Knative release version
v0.15.2

Additional context

###############

2020/07/13 13:59:39 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 13:59:41 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 13:59:41 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 13:59:44 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 14:01:18 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 14:01:22 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 14:01:36 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 14:01:37 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 14:01:39 Env variable ARTIFACTS not set. Using artifacts instead.

2020/07/13 14:01:41 Env variable ARTIFACTS not set. Using artifacts instead.

...

                "secret": {

                  "defaultMode": 420,

                  "secretName": "default-token-l6twz"

                }

              }

            ]

          },

          "status": {

            "conditions": [

              {

                "lastProbeTime": null,

                "lastTransitionTime": "2020-07-13T14:01:14Z",

                "status": "True",

                "type": "Initialized"

              },

              {

                "lastProbeTime": null,

                "lastTransitionTime": "2020-07-13T14:01:16Z",

                "status": "True",

                "type": "Ready"

              },

              {

                "lastProbeTime": null,

                "lastTransitionTime": "2020-07-13T14:01:16Z",

                "status": "True",

                "type": "ContainersReady"

              },

              {

                "lastProbeTime": null,

                "lastTransitionTime": "2020-07-13T14:01:14Z",

                "status": "True",

                "type": "PodScheduled"

              }

            ],

            "containerStatuses": [

              {

                "containerID": "containerd://5b931bb76e9c3d37c3f90f509b8942c060ccc89fde4f18fae57f52a6801a5b9f",

                "image": "us.icr.io/kneve-master-t/logevents:latest",

                "imageID": "us.icr.io/kneve-master-t/logevents@sha256:030aad447d4582c34883385dfd6a93225be5a3c287414c87ed503e270f6f48b0",

                "lastState": {},

                "name": "logevents",

                "ready": true,

                "restartCount": 0,

                "started": true,

                "state": {

                  "running": {

                    "startedAt": "2020-07-13T14:01:16Z"

                  }

                }

              }

            ],

            "hostIP": "10.177.53.209",

            "phase": "Running",

            "podIP": "172.30.9.86",

            "podIPs": [

              {

                "ip": "172.30.9.86"

              }

            ],

            "qosClass": "BestEffort",

            "startTime": "2020-07-13T14:01:14Z"

          }

        }

    tracker.go:136: Waiting for subscriber-annotation to be deleted

    tracker.go:128: Cleaning resource: "subscriber-annotation"

        {

          "apiVersion": "v1",

          "kind": "Service",

          "metadata": {

            "creationTimestamp": "2020-07-13T14:01:14Z",

            "name": "subscriber-annotation",

            "namespace": "test-trigger-dependency-annotation-p2xwh",

            "resourceVersion": "28384209",

            "selfLink": "/api/v1/namespaces/test-trigger-dependency-annotation-p2xwh/services/subscriber-annotation",

            "uid": "47dda702-edab-4815-8e3a-1bc6d2866a09"

          },

          "spec": {

            "clusterIP": "172.21.158.165",

            "ports": [

              {

                "name": "http",

                "port": 80,

                "protocol": "TCP",

                "targetPort": 8080

              }

            ],

            "selector": {

              "e2etest": "7647e98f-1c8a-4977-bcab-a7e3275a52cf"

            },

            "sessionAffinity": "None",

            "type": "ClusterIP"

          },

          "status": {

            "loadBalancer": {}

          }

        }

    tracker.go:136: Waiting for subscriber-annotation to be deleted

FAIL

FAIL	knative.dev/eventing/test/e2e	403.593s

FAIL

[lberk]

This test seems to pass in Knative CI (we haven't seen this in flaky tests since mid-june). Would you be willing to elaborate a bit more on the testing environment this is failing in? Any help in diagnosing the difference in environment would be helpful.
related: #3379

[lberk]

Have you tried the most recent 0.15 point release? (v0.15.4) are you seeing the same behaviour there?

[lberk]

@LiYa-Xu feel free to reopen this issue if you're still hitting it, otherwise we're going to close it for now, thanks!