Method remove_group_member

nodedb-cluster/src/routing.rs:196–208

Remove a node from a group's voter and learner lists. If the removed node was the current leader hint, the hint is cleared so the next query drives a fresh discovery. Returns `true` if the group existed and anything was actually removed. The caller is responsible for safety: dropping below the configured replication factor must be gated by `decommission::safety::check_can_decommission`.

(&mut self, group_id: u64, node_id: u64)

    /// configured replication factor must be gated by
    /// `decommission::safety::check_can_decommission`.
    pub fn remove_group_member(&mut self, group_id: u64, node_id: u64) -> bool {
        let Some(info) = self.group_members.get_mut(&group_id) else {
            return false;
        };
        let before_members = info.members.len();
        let before_learners = info.learners.len();
        info.members.retain(|&id| id != node_id);
        info.learners.retain(|&id| id != node_id);
        if info.leader == node_id {
            info.leader = 0;
        }
        info.members.len() != before_members || info.learners.len() != before_learners
    }

    /// Update the learner list for a Raft group.
    pub fn set_group_learners(&mut self, group_id: u64, learners: Vec<u64>) {