Flaky test: DeleteVolume fails due to device busy about csi-driver-host-path HOT 7 CLOSED

/kind failing-test

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@kubernetes-csi/csi-misc

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This is happening in CI too: https://prow.k8s.io/view/gcs/kubernetes-jenkins/logs/ci-kubernetes-csi-1-13-on-kubernetes-1-13/1169142833098002432

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Ok I think it's because in 1.13 logic, we were checking if a directory was a mount point before calling unpublish: https://github.com/kubernetes/kubernetes/blob/release-1.13/pkg/volume/csi/csi_mounter.go#L299

Which I think won't work for hostpath since hostpath is just a bind mount of a directory on the root fs. We removed the logic in 1.14 when implementing ephemeral volumes.

I don't really understand why this isn't failing all the time though (instead of just being flaky).

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Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
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.

Send feedback to sig-testing, kubernetes/test-infra and/or fejta.
/lifecycle stale

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/close
We no longer support 1.13 and 1.14 tests are looking stable

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@msau42: Closing this issue.

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