Hi,

I'm ugrading brokers from 0.8.2.1 to 0.9.0.1 and I'm having trouble with
replicas from old brokers getting out of sync with replicas on new ones
(ISR shrinks).

Since replica.lag.time.max.ms on 0.9 includes the time for the follower to
catch up, I've increased it but that does not remove all shrinks.

Any suggestion on what parameter I could modify or what metrics to look at ?

Thanks,

Eric

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