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ONTAP system panic due to slow root volume

  1. Last updated
    Jan 9, 2025
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289
Visibility:
Public
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0
Category:
ontap-9
Specialty:
CORE
Last Updated:
1/9/2025, 7:25:25 PM

Applies to

  • NetApp ONTAP 9
  • NetApp ONTAP Select
  • NetApp Cloud Volumes ONTAP (CVO)

Issue

  • The system becomes sluggish and unresponsive.
  • NAS shares may become unavailable.
  • EMS logs show the following panic string:
mgwd: assertion (0) at src/rdb/TM.cc:3838 failed, raising SIGABRT(6) at RIP 0x81d714d9a (pid 2720, uid 0, timestamp 1667352600)
  • Aggregates may appear in unknown status but otherwise remain online and serving data.
  • Advanced command cluster ring show may show a timeout/failure to communicate with a node:

Warning: Unable to list entries on node cluster-01. Timeout: Operation "cluster_ring_iterator::next_imp()" took longer than 25 seconds to complete [from mgwd on node "cluster-01" (VSID: -1) to mgwd at 169.254.1.123]
Error: show failed: Timeout: Operation "cluster_ring_iterator::next_imp()" took longer than 25 seconds to complete [from mgwd on node "cluster-01" (VSID: -1) to mgwd at 169.254.1.123]

 

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