In Raft, why can a node that missed recent committed entries not become the leader?

Options

• ✗ The old leader picks its own successor
• ✓ Nodes refuse to vote for a candidate whose log is less up to date than their own, and a winner needs a majority Correct
• ✗ Nodes with missing entries do not start elections
• ✗ The cluster waits until every node has caught up

Why

A committed entry is stored on a majority, and any winner needs votes from a majority. The two majorities overlap, so at least one voter has the entry and refuses a candidate without it (logs are compared by last term, then length). Every leader therefore holds all committed entries.

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