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NFS client hang up if storage reply NFS4ERR_DELAY followed by NFS4ERR_SEQ_MISORDERED

  1. Last updated
    Jun 28, 2024
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Category:
ontap-9
Specialty:
nas
Last Updated:
6/28/2024, 2:29:48 PM

Applies to

  • ONTAP 9
  • NFSv4.1
  • pNFS
  • RedHat Enterprise Linux (RHEL)

Issue

  • After a network partition (network is unavailable for some time) Linux clients can be seen to lose track of NFS4.1 Sequencing
  • After the network has recovered, the NFS client has incremented its sequence on the active slot beyond where the server has acknowledged
    • This is an indication that multiple sequences have been sent and not retransmitted as the server never receives the missed sequences
 

 

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