Add ability to transition WiredTiger encryption-at-rest from local keyfile encryption (LKE) to KMIP
If you are using local key file encryption and backing up your MongoDB deployment using Ops Manager, backups won't work correctly if you upgrade to MongoDB 4.2. The correct solution is to switch your encryption to KMIP. But if you try doing that, automation will get stuck!
we've done such transition successfully recently. you need provide more details why it stuck... and probably open ticket with mongo support.