Module election_design

d_engine::docs::architecture

Module election_design 

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ยงConditions That Cause a Leader to Step Down

A leader will step down in the following situations:

  1. Receives an RPC with a Higher Term If the leader receives an AppendEntries, RequestVote, or other RPC with a term number greater than its current term, it must step down and revert to a follower.
  2. Grants a Vote to Another Candidate If the leader receives a RequestVote RPC and grants the vote to another candidate (usually because the candidate has a more up-to-date log), the leader must step down.
  3. Fails to Contact the Majority for Too Long If the leader cannot reach a quorum (majority of nodes) for longer than one election timeout, it must assume it no longer holds authority and step down.