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send attnet unsubscription event on random subnet expiry (#3600)

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## Issue Addressed
🐞 in which we don't actually unsubscribe from a random long lived subnet when it expires

## Proposed Changes

Remove code addressing a specific case in which we are subscribed to all subnets and handle the removal of the long lived subnet. I don't think the special case code is particularly important as, if someone is running with that many validators to be subscribed to all subnets, it should use `--subscribe-all-subnets` instead

## Additional Info

Noticed on some test nodes climbing bandwidth usage periodically (around 27hours, the time of subnet expirations) I'm running this code to test this does not happen anymore, but I think it should be good now
This commit is contained in:
Divma 2022-09-23 03:52:45 +00:00
parent 9246a92d76
commit 9bd384a573
1 changed files with 4 additions and 22 deletions
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26
beacon_node/network/src/subnet_service/attestation_subnets.rs
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@ -564,26 +564,8 @@ impl<T: BeaconChainTypes> AttestationService<T> {
///
/// This function selects a new subnet to join, or extends the expiry if there are no more
/// available subnets to choose from.
fn handle_random_subnet_expiry(&mut self, subnet_id: SubnetId, end_slot: Slot) {
let subnet_count = self.beacon_chain.spec.attestation_subnet_count;
if self.long_lived_subscriptions.len() == (subnet_count - 1) as usize {
let end_slot = end_slot + self.long_lived_subnet_subscription_slots;
// This is just an extra accuracy precaution, we could use the default timeout if
// needed.
if let Some(time_to_subscription_end) =
self.beacon_chain.slot_clock.duration_to_slot(end_slot)
{
// We are at capacity, simply increase the timeout of the current subnet.
self.long_lived_subscriptions.insert_at(
subnet_id,
end_slot + 1,
time_to_subscription_end,
);
} else {
self.long_lived_subscriptions.insert(subnet_id, end_slot);
}
return;
}
fn handle_random_subnet_expiry(&mut self, subnet_id: SubnetId) {
self.handle_removed_subnet(subnet_id, SubscriptionKind::LongLived);
// Remove the ENR bitfield bit and choose a new random on from the available subnets
// Subscribe to a new random subnet.
@ -718,8 +700,8 @@ impl<T: BeaconChainTypes> Stream for AttestationService<T> {
// Process any random subnet expiries.
match self.long_lived_subscriptions.poll_next_unpin(cx) {
Poll::Ready(Some(Ok((subnet_id, end_slot)))) => {
self.handle_random_subnet_expiry(subnet_id, end_slot)
Poll::Ready(Some(Ok((subnet_id, _end_slot)))) => {
self.handle_random_subnet_expiry(subnet_id)
}
Poll::Ready(Some(Err(e))) => {
error!(self.log, "Failed to check for random subnet cycles"; "error"=> e);