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CIFS slowness issue observed after receiving Nblade.vscanConnInactive alerts

Last Updated:

Applies to

  • ONTAP 9
  • 3rd party AntiVirus Scanner
  • Symantec Protection Engine


  • CIFS share slowness is observed when VSCAN is enabled.
  • Error reported in EMS logs:

Fri Jun 18 04:27:59 +0800 [node-02: kernel: Nblade.vscanConnInactive:notice]: For Vserver "svm03", ONTAP(R) forcibly closed the vscan connection originated from the nonresponsive AV server "10.a.b.c".

  • On the antivirus server side, below error was reported in windows event logs:

Symantec Protection Engine has failed to connect to RPC client

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