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antirez authored
Sentinel state now includes the idea of current epoch and config epoch. In the Hello message, that is now published both on masters and slaves, a Sentinel no longer just advertises itself but also broadcasts its current view of the configuration: the master name / ip / port and its current epoch. Sentinels receiving such information switch to the new master if the configuration epoch received is newer and the ip / port of the master are indeed different compared to the previos ones.
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