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antirez authored
We want to send pings and pongs at specific intervals, since our packets also contain information about the configuration of the cluster and are used for gossip. However since our cluster bus is used in a mixed way for data (such as Pub/Sub or modules cluster messages) and metadata, sometimes a very busy channel may delay the reception of pong packets. So after discussing it in #7216, this commit introduces a new field that is not exposed in the cluster, is only an internal information about the last time we received any data from a given node: we use this field in order to avoid detecting failures, claiming data reception of new data from the node is a proof of liveness.
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