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VDI Inaccessibility After ONTAP Upgrade: NFS Lock/Sessions Issue

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9
  • NFS v4.1/v4.2 environments
  • Virtual Desktop Infrastructure (VDI) deployments

Issue

After upgrading ONTAP from 9.16.0P1 to 9.18.1RC1 (via 9.16.1P11), production VDI pools became inaccessible. While basic NFS operations (mount, ls, touch, read/write) worked, running application commands on certain files hung indefinitely, causing users to not be able to log in to their VDI environment.

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