From 97cc753037189cab9722b02820ca16e64342a429 Mon Sep 17 00:00:00 2001
From: Burton Qin <bobbqqin@gmail.com>
Date: Sat, 18 Jun 2022 12:26:14 +0800
Subject: [PATCH] rpc: fix possible deadlock in rpc

---
 rpc/src/rpc.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rpc/src/rpc.rs b/rpc/src/rpc.rs
index 3ff3b925145c86..8db0788c6eb8b7 100644
--- a/rpc/src/rpc.rs
+++ b/rpc/src/rpc.rs
@@ -1431,12 +1431,12 @@ impl JsonRpcRequestProcessor {
         bank: &Arc<Bank>,
     ) -> Option<TransactionStatus> {
         let (slot, status) = bank.get_signature_status_slot(&signature)?;
-        let r_block_commitment_cache = self.block_commitment_cache.read().unwrap();
 
         let optimistically_confirmed_bank = self.bank(Some(CommitmentConfig::confirmed()));
         let optimistically_confirmed =
             optimistically_confirmed_bank.get_signature_status_slot(&signature);
 
+        let r_block_commitment_cache = self.block_commitment_cache.read().unwrap();
         let confirmations = if r_block_commitment_cache.root() >= slot
             && is_finalized(&r_block_commitment_cache, bank, &self.blockstore, slot)
         {