I think you may be asking a slightly different question. If a broker falls out of ISR and does not rejoin the ISR, it may point to some bottleneck (e.g. local IO), fewer partitions for large topics or some fatal error causing the ReplicaFetcherThread to die. Just restarting the broker without knowing the root cause might not always make the broker rejoin ISR.
Thanks, Neha On Sep 26, 2013 12:48 PM, "Calvin Lei" <ckp...@gmail.com> wrote: > > Is restarting the broker the only way to put a broker back to the isr? > > Thanks > Cal