add tracing for marking members confirmed

Signed-off-by: Matt Wrock <[email protected]>

components/butterfly/src/member.rs

@@ -513,12 +513,13 @@ impl MemberList {
                              incoming: Membership,
                              ignore_incarnation_and_health: bool)
                              -> bool {
+        let member_id = incoming.member.id.clone();
         // Is this clone necessary, or can a key be a reference to a field contained in the value?
         // Maybe the members we store should not contain the ID to reduce the duplication?
         trace!("insert_membership_mlw: Member: {}, Health: {}",
-               incoming.member.id,
+               member_id,
                incoming.health);
-        let modified = match self.write_entries().entry(incoming.member.id.clone()) {
+        let modified = match self.write_entries().entry(member_id.clone()) {
             hash_map::Entry::Occupied(mut entry) => {
                 let val = entry.get_mut();
                 if incoming.newer_or_less_healthy_than(val.member.incarnation, val.health)
@@ -551,6 +552,9 @@ impl MemberList {
         };
 
         if modified {
+            if incoming.health == Health::Confirmed {
+                trace!("inserting confirmed member: {}", member_id);
+            }
             self.increment_update_counter();
             self.calculate_peer_health_metrics_mlr();
         }

components/butterfly/src/server/expire.rs

@@ -7,6 +7,7 @@ use crate::{rumor::{RumorKey,
             server::{timing::Timing,
                      Server}};
 use habitat_common::liveliness_checker;
+use log::trace;
 use std::{thread,
           time::Duration};
 
@@ -26,6 +27,7 @@ fn run_loop(server: &Server, timing: &Timing) -> ! {
                                             .members_expired_to_confirmed_mlw(timing.confirm());
 
         for id in newly_confirmed_members {
+            trace!("inserting confirmed member: {}", id);
             server.rumor_heat
                   .lock_rhw()
                   .start_hot_rumor(RumorKey::new(RumorType::Member, &id, ""));