TestTaskRunPipelineRunCancel is flakely

[bobcatfish]

Expected Behavior

TestTaskRunPipelineRunCancel should only fail due to legit bugs (or if there is some kind of transient test infra issue we can't avoid)

Actual Behavior

The test failed recently on an unrelated PR and passed on a re-run: #2782 - https://tekton-releases.appspot.com/build/tekton-prow/pr-logs/pull/tektoncd_pipeline/2782/pull-tekton-pipeline-integration-tests/1273990227291017216/

The error is:

  TestTaskRunPipelineRunCancel/No_retries: cancel_test.go:123: Failed to cancel PipelineRun `pear`: Operation cannot be fulfilled on pipelineruns.tekton.dev "pear": the object has been modified; please apply your changes to the latest version and try again

[jerop]

Saw this test flake again in https://tekton-releases.appspot.com/build/tekton-prow/pr-logs/pull/tektoncd_pipeline/4502/pull-tekton-pipeline-alpha-integration-tests/1491815954336714752/#testv1alpha1-testtaskrunpipelineruncancel

[tekton-robot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale with a justification.
Stale issues rot after an additional 30d of inactivity and eventually close.
If this issue is safe to close now please do so with /close with a justification.
If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/lifecycle stale

Send feedback to tektoncd/plumbing.

[tekton-robot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten with a justification.
Rotten issues close after an additional 30d of inactivity.
If this issue is safe to close now please do so with /close with a justification.
If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/lifecycle rotten

Send feedback to tektoncd/plumbing.

[tekton-robot]

Rotten issues close after 30d of inactivity.
Reopen the issue with /reopen with a justification.
Mark the issue as fresh with /remove-lifecycle rotten with a justification.
If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/close

Send feedback to tektoncd/plumbing.

[tekton-robot]

@tekton-robot: Closing this issue.

In response to this:

Rotten issues close after 30d of inactivity.
Reopen the issue with /reopen with a justification.
Mark the issue as fresh with /remove-lifecycle rotten with a justification.
If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/close

Send feedback to tektoncd/plumbing.

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