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Switchover simulation fails due to object store unreachable after SGWS upgrade

Last Updated:

Applies to

  • ONTAP 9
  • FabricPool
  • FAS
  • AFF
  • StorageGrid


  • Metrocluster switchover simulation fails:

cluster::> metrocluster operation show
       Operation: switchover-simulate
           State: failed
      Start Time: 7/29/2022 09:20:32
        End Time: 7/29/2022 09:20:48
          Errors: Failed to validate the node and cluster components before the switchover operation.
                  cluster (non-overridable veto): Cannot verify availability of the object store from node node_name                      Reason: Wrong port or server is not reachable.

  • Object-store mirrors go unavailable.

cluster::> storage aggregate object-store show

Aggregate      Object Store Name Availability   Mirror Type
-------------- ----------------- -------------  -----------
aggr_01        cluster-mirror    unavailable    mirror
aggr_01        cluster-primary   available      primary
2 entries were displayed.

cluster::> storage aggregate object-store show -object-store-name cluster-mirror -instance
                         Aggregate Name: aggr_01
ONTAP Name for this Object Store Config: cluster-mirror
       Availability of the Object Store: unavailable
 Reason why Object Store is Unavailable: Connection unavailable
             Cached Value of Used Space: 137.4TB

  • ​​​​​​Event logs report the object store unavailable due to timeout errors:
[node_name: OscLowPriThreadPool:]: Unable to connect to the object store "cluster-mirror" from node 210xxxxx-xxxx-xxxx-xxxx-xxxxxxxxx36e. Reason: Operation Timedout.
  • The issue starts post upgrading the StorageGrid Webscale (SGWS) from to
  • After the upgrade, the SGWS firmware does not reflect correctly on the ONTAP end:

cluster::> storage aggregate object-store config show -instance (Output truncated for brevity)
                   Object Store Configuration Name: cluster-mirror
                 Type of the Object Store Provider: SGWS
              Server Field Returned in HTTP Header: StorageGRID/

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