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Azure Server Busy Errors and Throttling in Cloud Volumes ONTAP cause upgrade to fail

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Category:
cloud-volumes-ontap-cvo
Specialty:
ds_cvo
Last Updated:

Applies to

  • Cloud Volumes ONTAP (CVO)
  • Microsoft Azure

Issue

  • ONTAP upgrade of CVO fails during pre-validation checks pointing to errors with  aggregates and with FabricPool objectstores
  • Audit Trail shows "Internal server error" as seen below
Jul 19 2025, 7:14:32 pm
Cluster Image Validate
failed

{
"_cluster": "10.X.X.X,10.X.X.X",
"_failure": "There was an internal server error.",
"nodes": null,
"packageVersion": "9.12.1P18"
}
 
  • EMS logs

FriJul1810:16:21+0000[CLUSTER1-02:OscHighPriThreadPool:pha.obj.throttle:notice]:PHAObjthrottled109timesontheblob01RootBlob-CLUSTER1inthecontainerblobcontainerduetothe"AZURE_SERVER_BUSY".

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