Armin Braun f70391c6cc
Fix Broken Snapshot State Machine in Corner Case (#63534) (#63608)
This fixes a gap in testing and a bug that can occur in various forms:
When we would start a snapshot or clone related to a shard that was done
snapshotting/cloning but its overall operation was not yet finalized
at the time of starting the operation, we would base the operation off of
the wrong generation. This would not cause a corrupted repo, but would
cause the operation to be `PARTIAL`.
This commit fixes the state machine to take into account the correct generation
in this case.

Closes #63498
2020-10-13 16:05:34 +02:00
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