Code change:
} } } <ins> func TestSetNominatedNodeName(t *testing.T) { tests := []struct { name                     string currentNominatedNodeName string newNominatedNodeName     string expectedPatchRequests    int expectedPatchData        string }{ { name:                     "Should make patch request to set node name", currentNominatedNodeName: "", newNominatedNodeName:     "node1", expectedPatchRequests:    1, expectedPatchData:        `{"status":{"nominatedNodeName":"node1"}}`, }, { name:                     "Should make patch request to clear node name", currentNominatedNodeName: "node1", newNominatedNodeName:     "", expectedPatchRequests:    1, expectedPatchData:        `{"status":{"nominatedNodeName":null}}`, }, { name:                     "Should not make patch request if nominated node is already set to the specified value", currentNominatedNodeName: "node1", newNominatedNodeName:     "node1", expectedPatchRequests:    0, }, { name:                     "Should not make patch request if nominated node is already cleared", currentNominatedNodeName: "", newNominatedNodeName:     "", expectedPatchRequests:    0, }, } for _, test := range tests { t.Run(test.name, func(t *testing.T) { actualPatchRequests := 0 var actualPatchData string cs := &clientsetfake.Clientset{} cs.AddReactor("patch", "pods", func(action clienttesting.Action) (bool, runtime.Object, error) { actualPatchRequests++ patch := action.(clienttesting.PatchAction) actualPatchData = string(patch.GetPatch()) // For this test, we don't care about the result of the patched pod, just that we got the expected // patch request, so just returning &v1.Pod{} here is OK because scheduler doesn't use the response. return true, &v1.Pod{}, nil }) pod := &v1.Pod{ ObjectMeta: metav1.ObjectMeta{Name: "foo"}, Status:     v1.PodStatus{NominatedNodeName: test.currentNominatedNodeName}, } preemptor := &podPreemptorImpl{Client: cs} if err := preemptor.setNominatedNodeName(pod, test.newNominatedNodeName); err != nil { t.Fatalf("Error calling setNominatedNodeName: %v", err) } if actualPatchRequests != test.expectedPatchRequests { t.Fatalf("Actual patch requests (%d) dos not equal expected patch requests (%d)", actualPatchRequests, test.expectedPatchRequests) } if test.expectedPatchRequests > 0 && actualPatchData != test.expectedPatchData { t.Fatalf("Patch data mismatch: Actual was %v, but expected %v", actualPatchData, test.expectedPatchData) } }) } } func TestUpdatePodCondition(t *testing.T) { tests := []struct { name                     string currentPodConditions     []v1.PodCondition newPodCondition          *v1.PodCondition expectedPatchRequests    int expectedPatchDataPattern string }{ { name:                 "Should make patch request to add pod condition when there are none currently", currentPodConditions: []v1.PodCondition{}, newPodCondition: &v1.PodCondition{ Type:               "newType", Status:             "newStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 13, 1, 1, 1, 1, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 12, 1, 1, 1, 1, time.UTC)), Reason:             "newReason", Message:            "newMessage", }, expectedPatchRequests:    1, expectedPatchDataPattern: `{"status":{"conditions":[{"lastProbeTime":"2020-05-13T01:01:01Z","lastTransitionTime":".*","message":"newMessage","reason":"newReason","status":"newStatus","type":"newType"}]}}`, }, { name: "Should make patch request to add a new pod condition when there is already one with another type", currentPodConditions: []v1.PodCondition{ { Type:               "someOtherType", Status:             "someOtherTypeStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 11, 0, 0, 0, 0, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 10, 0, 0, 0, 0, time.UTC)), Reason:             "someOtherTypeReason", Message:            "someOtherTypeMessage", }, }, newPodCondition: &v1.PodCondition{ Type:               "newType", Status:             "newStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 13, 1, 1, 1, 1, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 12, 1, 1, 1, 1, time.UTC)), Reason:             "newReason", Message:            "newMessage", }, expectedPatchRequests:    1, expectedPatchDataPattern: `{"status":{"$setElementOrder/conditions":[{"type":"someOtherType"},{"type":"newType"}],"conditions":[{"lastProbeTime":"2020-05-13T01:01:01Z","lastTransitionTime":".*","message":"newMessage","reason":"newReason","status":"newStatus","type":"newType"}]}}`, }, { name: "Should make patch request to update an existing pod condition", currentPodConditions: []v1.PodCondition{ { Type:               "currentType", Status:             "currentStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 13, 0, 0, 0, 0, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 12, 0, 0, 0, 0, time.UTC)), Reason:             "currentReason", Message:            "currentMessage", }, }, newPodCondition: &v1.PodCondition{ Type:               "currentType", Status:             "newStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 13, 1, 1, 1, 1, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 12, 1, 1, 1, 1, time.UTC)), Reason:             "newReason", Message:            "newMessage", }, expectedPatchRequests:    1, expectedPatchDataPattern: `{"status":{"$setElementOrder/conditions":[{"type":"currentType"}],"conditions":[{"lastProbeTime":"2020-05-13T01:01:01Z","lastTransitionTime":".*","message":"newMessage","reason":"newReason","status":"newStatus","type":"currentType"}]}}`, }, { name: "Should make patch request to update an existing pod condition, but the transition time should remain unchanged because the status is the same", currentPodConditions: []v1.PodCondition{ { Type:               "currentType", Status:             "currentStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 13, 0, 0, 0, 0, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 12, 0, 0, 0, 0, time.UTC)), Reason:             "currentReason", Message:            "currentMessage", }, }, newPodCondition: &v1.PodCondition{ Type:               "currentType", Status:             "currentStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 13, 1, 1, 1, 1, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 12, 0, 0, 0, 0, time.UTC)), Reason:             "newReason", Message:            "newMessage", }, expectedPatchRequests:    1, expectedPatchDataPattern: `{"status":{"$setElementOrder/conditions":[{"type":"currentType"}],"conditions":[{"lastProbeTime":"2020-05-13T01:01:01Z","message":"newMessage","reason":"newReason","type":"currentType"}]}}`, }, { name: "Should not make patch request if pod condition already exists and is identical", currentPodConditions: []v1.PodCondition{ { Type:               "currentType", Status:             "currentStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 13, 0, 0, 0, 0, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 12, 0, 0, 0, 0, time.UTC)), Reason:             "currentReason", Message:            "currentMessage", }, }, newPodCondition: &v1.PodCondition{ Type:               "currentType", Status:             "currentStatus", LastProbeTime:      metav1.NewTime(time.Date(2020, 5, 13, 0, 0, 0, 0, time.UTC)), LastTransitionTime: metav1.NewTime(time.Date(2020, 5, 12, 0, 0, 0, 0, time.UTC)), Reason:             "currentReason", Message:            "currentMessage", }, expectedPatchRequests: 0, }, } for _, test := range tests { t.Run(test.name, func(t *testing.T) { actualPatchRequests := 0 var actualPatchData string cs := &clientsetfake.Clientset{} cs.AddReactor("patch", "pods", func(action clienttesting.Action) (bool, runtime.Object, error) { actualPatchRequests++ patch := action.(clienttesting.PatchAction) actualPatchData = string(patch.GetPatch()) // For this test, we don't care about the result of the patched pod, just that we got the expected // patch request, so just returning &v1.Pod{} here is OK because scheduler doesn't use the response. return true, &v1.Pod{}, nil }) pod := &v1.Pod{ ObjectMeta: metav1.ObjectMeta{Name: "foo"}, Status:     v1.PodStatus{Conditions: test.currentPodConditions}, } updater := &podConditionUpdaterImpl{Client: cs} if err := updater.update(pod, test.newPodCondition); err != nil { t.Fatalf("Error calling update: %v", err) } if actualPatchRequests != test.expectedPatchRequests { t.Fatalf("Actual patch requests (%d) dos not equal expected patch requests (%d)", actualPatchRequests, test.expectedPatchRequests) } regex, err := regexp.Compile(test.expectedPatchDataPattern) if err != nil { t.Fatalf("Error compiling regexp for %v: %v", test.expectedPatchDataPattern, err) } if test.expectedPatchRequests > 0 && !regex.MatchString(actualPatchData) { t.Fatalf("Patch data mismatch: Actual was %v, but expected to match regexp %v", actualPatchData, test.expectedPatchDataPattern) } }) } } </ins>

Related discussion:
text: Which jobs are flaking: pull-kubernetes-integration Which test(s) are flaking: TestNominatedNodeCleanUp Testgrid link: Reason for failure: /sig scheduling
/assign
any progress on this one?
I was working on it and tried to find the root cause. I will give my solution within this week
Another one
Still happening cc
/assign
/close dupe
Closing this issue. <detailsIn response to : /close dupe Instructions for interacting with me using PR comments are available . If you have questions or suggestions related to my behavior, please file an issue against the repository. </details