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removes recursive read-locks on gossip (#13973) 

ClusterInfo::tvu_peers acquires a read-lock on gossip:
https://github.com/solana-labs/solana/blob/f0e934145/core/src/cluster_info.rs#L1171-L1185
and so, ClusterInfo::repair_peers is recursively locking gossip for
read twice:
https://github.com/solana-labs/solana/blob/f0e934145/core/src/cluster_info.rs#L1202-L1223
But std::sync::RwLock is not re-entrant (recursive).
This commit is contained in:
behzad nouri 2020-12-06 15:14:49 +00:00 committed by GitHub
parent f0e9341450
commit 6706f2b3bb
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1 changed files with 2 additions and 1 deletions
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core/src/cluster_info.rs
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@ -1205,9 +1205,10 @@ impl ClusterInfo {
// self.tvu_peers() already filters on: // self.tvu_peers() already filters on:
// node.id != self.id() && // node.id != self.id() &&
// node.shred_verion == self.my_shred_version() // node.shred_verion == self.my_shred_version()
let nodes = self.tvu_peers();
let nodes = { let nodes = {
let gossip = self.gossip.read().unwrap(); let gossip = self.gossip.read().unwrap();
self.tvu_peers() nodes
.into_iter() .into_iter()
.filter(|node| { .filter(|node| {
ContactInfo::is_valid_address(&node.serve_repair) ContactInfo::is_valid_address(&node.serve_repair)