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Client reports "NFS server not responding" but no issues seen on the storage end

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Category:
ontap-9
Specialty:
nfs
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Applies to

  • ONTAP 9
  • NFS

Issue

  • A single client logs NFS server not responding intermittently:

Sep 18 08:38:02 server kernel: [2681704.006022] nfs: server 10.xx.xx.233 not responding, still trying
Sep 18 08:41:15 server kernel: [2681896.500615] nfs: server 10.xx.xx.233 not responding, still trying
Sep 18 08:44:27 server kernel: [2682088.993327] nfs: server 10.xx.xx.233 not responding, still trying

  • Slowness is observed.
  • ONTAP doesn't report any errors in the event logs during the issue time.
  • PerfArchive data shows no IOPs during the errors, however, latency is low.
  • Packet traces were not collected during the time.

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