probe list members

1 files changed, 8 insertions, 3 deletions

diff --git a/src/state/peer.rs b/src/state/peer.rs
index 063b72b..ba8379a 100644
--- a/src/state/peer.rs
+++ b/src/state/peer.rs
@@ -146,7 +146,8 @@ pub(crate) struct PeerState {
     pub(crate) hello_attempts: u32,
     /// Since when we consider the peer unreachable (three unanswered HELLOs, or
     /// dormant). Only a message from it clears it (`mark_seen`): until then it is no
-    /// neighbour candidate, and a member gets probes (`probe_backoff`) instead.
+    /// neighbour candidate, and a member (by its HELLO_REPLY, or by the member list) gets
+    /// probes (`probe_backoff`) instead.
     pub(crate) unreachable_since: Option<Instant>,
 
     /// What went wrong with this peer so far (counted only, for /peers and /admin/stats).
@@ -352,8 +353,12 @@ impl PeerState {
     /// No more HELLO retries (the peer isn't our neighbour any more). A HELLO in flight
     /// finishes; a later handshake starts over. An unreachable member keeps its probes:
     /// it is no neighbour because it is unreachable, and only its answer can change that.
-    pub(crate) fn stop_hello_retries(&mut self) {
-        let probed = self.is_unreachable() && matches!(self.standing, Standing::Member { .. });
+    /// A member is one whose HELLO_REPLY said so, or one `listed` in the member list: after
+    /// a restart, none has answered yet, and members that restart together may each fail
+    /// to reach the others at first; without probes, none would try again.
+    pub(crate) fn stop_hello_retries(&mut self, listed: bool) {
+        let probed =
+            self.is_unreachable() && (listed || matches!(self.standing, Standing::Member { .. }));
         if !probed && matches!(self.hello_state, HelloState::AwaitingReply { .. }) {
             self.hello_state = HelloState::NotSent;
         }