As in issue, the combination and schema change at the same time may lead to version intersection.
Describe the overview of changes.
1. Do not do compaction before schema change is actually executed.
2. Set tablet as bad when it has version intersection.
3. Do not do schema change when it can not find appropriate versions to delete in new tablet.
4. Do not change rowsets after compaction if the rowsets of the tablet has changed.
47dfdd8e09