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CONTAP-361501: MGWD assertion failure due to memory exhaustion

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Issue

  • EMS shows signs of memory exhaustion (failures to mmap) in MGWD and continues periodically until the core.

[Node-01: mgwd: kern.vm.mmap.return:notice]: mmap(2) by mgwd (pid 4496) for size 135168 failed: VMEM limit exceeded, limit 4294967296, error 12.
[Node-01: mgwd: kern.vm.mmap.return:notice]: mmap(2) by mgwd (pid 4496) for size 32768 failed: VMEM limit exceeded, limit 4294967296, error 12.
[Node-01: mgwd: kern.vm.mmap.return:notice]: mmap(2) by mgwd (pid 4496) for size 4096 failed: VMEM limit exceeded, limit 4294967296, error 12.
[Node-01: mgwd: ucore.panicString:error]: 'mgwd: assertion (_rc == 0) at src/libadt/hash.c:193 failed, raising SIGABRT(6) at RIP 0x81f91e71a (pid 4496, uid 0, timestamp 1767235575)'

  • SnapMirror-related error detects:

[node1: cpeer.psk.unknown.cluster:error]: ONTAP received a TLS request to authenticate with a remote cluster's pre-shared key, but the remote cluster UUID (xxxx-xxxx-xxxx) is unrecognized. The probe arrived from address xx.xx.xx.xx in IPspace IPspace//xxxxxx.
  • ONTAP System Manager may be unavailable.

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