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What does "Nblade.CallbackTimedOut" error from SM NOTIFY mean after node upgrade/reboot ?

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9
  • NFS V3
  • Network Lock Manager (NLM)
  • Network Status Monitor (NSM)

Answer

  • Upgrade/Reboot of a node is equivalent to a Server Crash with respect to locking in NFS V3, achieved using ancillary protocols like NLM and NSM
  • When the server is ready to serve data again after an upgrade/reboot, it needs to notify all the clients which were previously holding locks
  • Clients can then reclaim all their existing locks as the server has lost all the information about locks issued before the crash
  • This notification work is being done by Status Monitor (NSM) via SM_NOTIFY call using the callback information of clients, saved in a file
  • If the SVM cannot reach to the PORTMAP program of a client/list of clients, then below error messages will appear in EMS logs

    [?] Tue May 05 16:47:27 CEST [Cluster01-01: nblade2: Nblade.CallbackTimedOut:error]: SM NOTIFY: Vserver 11, Vif 1057: PORTMAP program (Program number:100000 Program version:2) on client 10.11.12.10 is not responding.

Additional Information

  • NetApp Support Site - Bugs Online - Syslog Translator
  • The reason why SVM cannot reach to the PORTMAP program can vary and needs network connectivity troubleshooting between the SVM and the reported client
    • In some cases, the clients may have had connectivity with ONTAP removed prior to releasing 
    • If some clients are not reachable by the server repetitively, then these messages are expected to be present in EMS periodically (almost every 10 minutes)
  • The CallbackTimedOut messages should stop after ~24 hours of the reboot event

    Tue May 05 20:04:12 CEST [Cluster01-01: nblade2: Nblade.CallbackTimedOut:error]: SM NOTIFY: Vserver 11, Vif 1175: PORTMAP program (Program number:100000 Program version:2) on client 10.11.12.10 is not responding.
    Tue May 05 20:14:13 CEST [Cluster01-01: nblade2: Nblade.CallbackTimedOut:error]: SM NOTIFY: Vserver 11, Vif 1175: PORTMAP program (Program number:100000 Program version:2) on client 10.11.12.10 is not responding.
    Tue May 05 20:24:14 CEST [Cluster01-01: nblade2: Nblade.CallbackTimedOut:error]: SM NOTIFY: Vserver 11, Vif 1175: PORTMAP program (Program number:100000 Program version:2) on client 10.11.12.10 is not responding.

 

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