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FlexCache WAFL revoke manager fail threshold after ONTAP upgrade

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Category:
ontap-9
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NAS
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Applies to

  • ONTAP 9
  • FlexCache

Issue

  • FlexCache WAFLRevokeManagerFail count breached threshold 20 during/after ONTAP upgrade
  • System Manager/Active IQ Unified Manager reported FlexCacheWAFLEvictClientFail warning
  • EMS logs show repeated events similar to:
    • csm.sessionFailed: Cluster interconnect session (req=cluster1-node-04:dblade, rsp=cluster2-node-04:dblade, uniquifier=0e0657db726e691f) failed with transport type CT, session tag CPEER, record state ACTIVE, CSM error CSM_IDLE_SESSION_TIMEOUT, low-level error, socket error 0, and TLS error 2113929222.
  • Observed during cluster-wide ONTAP upgrade and node reboot cycle
  • No ongoing FlexCache volume disconnections or lock exhaustion post-upgrade

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