FYI: lemmy.ml is down now, hours after the upgrade to release 0.18.0 - EDIT: over 2 hours down, but BACK UP now!
504 Gateway Time-out nginx timeout error on home page
504 Gateway Time-out nginx timeout error on home page
There is a pattern of retries built into the code, but syncing has no ability to repair failures, and there have been hand-documented cases where even with retries, there is significant data loss: https://github.com/LemmyNet/lemmy/issues/3101