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RPANIC 5 Panic error with no core dump on Azure CVO

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cloud-volumes-ontap-cvo
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cloud
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Applies to

  • Cloud Volumes ONTAP (CVO)
  • ONTAP 9.16.1P5
  • Microsoft Azure

Issue

  • A Cloud Volumes ONTAP node in Azure experienced a system panic with the following symptoms:
  • AutoSupport alert: RPANIC:5:Associated error message could not be found in AutoSupport
  • Log output: 
    Fri Mar 20 11:07:09-0400 [NETAPPCVO02-01:wafl_exempt06:sk.panic:alert]: Panic String: prod/kmod/freebsd/simnv/simnv.c:7428: Assertion failure in SK process wafl_exempt06 on release 9.16.1P5(C)Fri Mar 20 11:05:17-0400 [NETAPPCVO02-01:wafl_exempt06:vnvram.dma.long.wait:alert]: vNVRAM flush taking over 10 seconds.
  • No core dump file was generated (system node coredump status showed “nocore”).
  • The cluster recovered automatically without human intervention.
  • Azure health event indicated:
    title: "Reboot initiated from inside the machine", details: "The Virtual Machine is undergoing a reboot as requested by a restart action triggered by an authorized user or process from within the Virtual Machine. No other action is required at this time."

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