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CIFS Share Inaccessible Due to Vscan Connectivity Issues

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ontap-9
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nas
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Applies to

  • NetApp ONTAP 9.7P18 and 9.7P23 (mixed-version cluster)
  • FAS8300
  • CIFS/SMB protocol
  • Vscan/Antivirus integration (TrendMicro)
  • SVMs with Vscan enabled
  • All ONTAP systems running an unsupported or end-of-support release

Issue

Users are unable to access files on a CIFS share. The following symptoms and log outputs were observed:

  • End users receive:
    Device attached to the system is not functioning
  • EMS logs on node (AWSMERNAFAS08) repeatedly show: 
    [nblade2:Nblade.vscanNoScannerConn:EMERGENCY]: Vserver "SVM1" has no virus scanner connection.
[nblade2:ems.engine.suppressed:debug]: Event 'Nblade.vscanNoScannerConn' suppressed 113 times in last 610 seconds.
  • Antivirus connector tests return:
    REST API call using account failed. The remote server returned an error: (401) Unauthorized
  • ONTAP Apache error logs show:
    authentication failure for "/api/network/ip/interfaces": PasswordMismatch
    for user accounts used by AV connectors.
  • All 8 AV connectors are affected, running TrendMicro version 1.0.6.0 (vendor recommends 1.0.7P1).
  • Cluster is running ONTAP 9.7P18 and 9.7P23 (unsupported).
  • Disabling Vscan on the impacted SVM restores file access.

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