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ONTAP 9 FabricPool object.store.unavailable due to no available connections to capacity tier resulting in application failures

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ontap-9
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Applies to

  • ONTAP 9
  • FabricPool
  • Retrieving data from capacity tier
  • CIFS

Issue

  • object.store.unavailable:EMERGENCY messages in ONTAP event logs
  • Intermittent application failures on larger read workloads retrieving data from FabricPool capacity tier
    • For example, restoring data from the capacity tier
  • CIFS returning STATUS_INTERNAL_ERROR
    • Applications like Jenkins may report "An internal error has occurred"
  • Large amount of DELETE calls and some GET calls returning "OSC error: 6" in sktrace.log
  • object_store_client_op statistics in ONTAP will show Connection Unavailable errors increasing during the problem time
    • delete.Connection unavailable will likely be growing quickly
    • get.Connection unavailable will likely be growing, but less quickly
  • No issues detected on the object store provider or network to object store provider
    • Similar problems could be seen due to issues at the object store provider or the connection to the object store
    • This KB does not address issues that may arise due to these external factors

 

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