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PVC Resize Concurrent with Pod Termination Causes Multipath Device Mismatch and CSI Unmount Failure

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Category:
trident-kubernetes
Specialty:
SNAPX
Last Updated:

Applies to

  • NetApp Trident
  • Kubernetes

Issue

When a PVC resize occurs while the application pod using that volume is terminating, the CSI unmount process can fail. This leads to:

  • CSI unmount and flush device timeouts
  • Multipath device size mismatch and path reconciliation failures
  • Hung I/O causing delayed cgroup and container cleanup
  • Node reboot required to restore device state

NetApp Storage Logs:

NOTICE: SAN::LUN resize_imp: vserver: <SVM>,
path: /vol/trident_pvc_xxxxxxx/lun0,
size: 858993459200

Kubelet Logs:

UnmountDevice failed: flush device failed for /dev/dm-0 : process killed after timeout
Failed to delete cgroup paths ... Timed out while waiting for systemd ...

Trident Logs:

GRPC error: rpc error: code = Internal desc = flush device failed for /dev/dm-0 : process killed after timeout
failed to unstage volume

 

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