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CONTAP-813520: Amazon FSx for NetApp ONTAP node panics with large_mbuf_flowcontrol stranded capacity

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Issue

After an upgrade from ONTAP 9.17.1P9 to 9.18.1P6, a node in a 2-node Amazon FSx for NetApp ONTAP file system suffers a disruption during inbound SnapMirror transfers whereas this did not happen before upgrade, with the message:
Resource large_mbuf_flowcontrol had 100% stranded capacity for 720 seconds in process nodewatchdog

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