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falls back on working-bank if root-bank::epoch-staked-nodes is none

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bank.get_leader_schedule_epoch(shred_slot)
is one epoch after epoch_schedule.get_epoch(shred_slot).

At epoch boundaries, shred is already one epoch after the root-slot. So
we need epoch-stakes 2 epochs ahead of the root. But the root bank only
has epoch-stakes for one epoch ahead, and as a result looking up epoch
staked-nodes from the root-bank fails.

To be backward compatible with the current master code, this commit
implements a fallback on working-bank if epoch staked-nodes obtained
from the root-bank is none.
This commit is contained in:
behzad nouri
2021-08-04 18:06:42 -04:00
parent eaf927cf49
commit e4be00fece
5 changed files with 30 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
core/src/cluster_nodes.rs
View File

@@ -261,6 +261,7 @@ impl<T: 'static> ClusterNodesCache<T> {
&self,
shred_slot: Slot,
root_bank: &Bank,
working_bank: &Bank,
cluster_info: &ClusterInfo,
) -> Arc<ClusterNodes<T>> {
let epoch = root_bank.get_leader_schedule_epoch(shred_slot);
@@ -273,11 +274,13 @@ impl<T: 'static> ClusterNodesCache<T> {
return Arc::clone(nodes);
}
}
let epoch_staked_nodes = root_bank.epoch_staked_nodes(epoch);
let epoch_staked_nodes = [root_bank, working_bank]
.iter()
.find_map(|bank| bank.epoch_staked_nodes(epoch));
if epoch_staked_nodes.is_none() {
inc_new_counter_info!("cluster_nodes-unknown_epoch_staked_nodes", 1);
if epoch != root_bank.get_leader_schedule_epoch(root_bank.slot()) {
return self.get(root_bank.slot(), root_bank, cluster_info);
return self.get(root_bank.slot(), root_bank, working_bank, cluster_info);
}
inc_new_counter_info!("cluster_nodes-unknown_epoch_staked_nodes_root", 1);
}