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Does "Stateful protocol sessions may disconnect on interface state change" warning in upgrade advisor impact all NFSv4 volumes during ONTAP upgrade?

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Category:
ontap-9
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core
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Applies to

  • ONTAP 9

Answer

  • As far as the NFSv4 warning, there are many recorded traffic handling failure scenarios when failovers occur with NFSv4.
  • Some applications are very sensitive to these types of maintenance and cannot tolerate failover scenarios.
  • These are all client-sided issues in how the traffic is handled, usually resulting in stale mounts and stale file handles. This prompted NetApp to place this warning in the upgrade advisors.
  • This warning should only appear when you run the upgrade prechecks.
  •  NFSv4 clients are visible in the output of:
::> vserver nfs connected-clients show
 

Additional Information

If only NFSv3 is present, this warning will not appear.
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