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                                            Zixiong Liu

CREATE INDEX and cancelling the DDL job causes replication to be interrupted

Upon reviewing the user's log, the time at which TiKV CPU consumption starts increasing coincides with the `start-ts` of the DDL job.

[BUG] CDCRegionClient's key range is not working

Yes. It is the best approach now to support filtering on the client side.

ticdc/log: suppress duplicated log to avoid flooding

Can this sampling be scoped? I.e., can it only filter logs from some packages, but not others? Using sampling on some mission critical modules might cause difficulty debugging.