CVOへのSnapMirrorがネットワークエラーCSM：Operation referred to a non-existent sessionで失敗します
環境
- ONTAP 9
- SnapMirror
- Cloud Volumes ONTAP（CVO）
- AWS ST1ディスク
問題
- 50TBの49.3でSnapMirrorの初期化が継続的に失敗し、ネットワークエラーが発生する
- 転送を中止して再初期化したが、同じエラーが発生した
- snapmirror-error-log.txtには次のエラーが記録されています。
Tue May 9 20:32:59 UTC 2023 Initialize[Apr 24 20:48:35]:60f3d91a-e2e1-11ed-963a-43d646b09c04 Operation-Uuid=61ff896d-e2e1-11ed-963a-43d646b09c04 Group=none Operation-Cookie=0 action=Defer source=vserver:volume destination=svm:destination status=Failure message=Transfer failed. (Replication operation request failed from Cluster Id: source_cluster Node Id: node # to Cluster Id: dest_cluster Node Id: node # due to a network error(CSM: Operation referred to a non-existent session.) af1r00napcvoh01::*> event show -event device* Time Node Severity Event ------------------- ---------------- ------------- --------------------------- 5/11/2023 22:18:06 cluster-01 NOTICE device.latency.threshold: The device latency in microseconds exceeded the threshold value for device "nvd#" and the associated target device "n/a". The threshold is "25000", execution latency is "57914", total latency is "57951", and the number of operations for this period is "16257". 5/11/2023 22:06:03 cluster-01 NOTICE device.latency.threshold: The device latency in microseconds exceeded the threshold value for device "is#" and the associated target device "/dev/nvd#". The threshold is "25000", execution latency is "71475", total latency is "71492", and the number of operations for this period is "469". 5/11/2023 22:03:04 cluster-01 NOTICE device.latency.threshold: The device latency in microseconds exceeded the threshold value for device "nv#5" and the associated target device "n/a". The threshold is "25000", execution latency is "57305", total latency is "57393", and the number of operations for this period is "16129". 5/11/2023 21:51:02 cluster-01 NOTICE device.latency.threshold: The device latency in microseconds exceeded the threshold value for device "is#" and the associated target device "/dev/nvd##". The threshold is "25000", execution latency is "80184", total latency is "80200", and the number of operations for this period is "344".