GitHub user vinothchandar added a comment to the discussion: RocksDB as The 
Replica of MDT/RLI

> The concurrent upsert consistency still works under OCC since the task 
> failover would anyway retrigger the full bootstrap of the RocksDB replica, as 
> of now, simple bucket index is a prerequisite for NBCC so it should not be a 
> strong concern or blocker for the RLI.

I don't like how we are coupling index choices and concurrency models. Before 
we go to NBCC, can you please explain in detail,how the failover and OCC 
handling are related.. Even if there is no multi-writer, just some async 
clustering -- the location of the record can change (even without failovers) 
and the writers need to know this right. 

@danny0405 I think we need to handle this. Restricting clustering also is not a 
good solution to this

GitHub link: 
https://github.com/apache/hudi/discussions/18296#discussioncomment-16167851

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