71cf6faaad
Deals with a situation where a follower becomes disconnected from the leader, but only for such a short time where it becomes candidate and puts up a NO_MASTER_BLOCK, but then receives a follower check from the leader. If the leader does not notice the node disconnecting, it is important for the node not to be turned back into a follower but try and join the leader again. We still should prefer the node into a follower on a follower check when this follower check triggers a term bump as this can help during a leader election to quickly have a leader turn all other nodes into followers, even before the leader has had the chance to transfer a possibly very large cluster state. Closes #36428 |
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