From 450d235358bb14016c1c8e26d036526e6bf3af36 Mon Sep 17 00:00:00 2001
From: Boqin Qin <bobbqqin@bupt.edu.cn>
Date: Wed, 3 Jun 2020 19:34:44 +0800
Subject: [PATCH] servers: fix possible deadlock (#3337)

---
 servers/src/mining/stratumserver.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/servers/src/mining/stratumserver.rs b/servers/src/mining/stratumserver.rs
index 06ee4849..84e2884a 100644
--- a/servers/src/mining/stratumserver.rs
+++ b/servers/src/mining/stratumserver.rs
@@ -342,10 +342,11 @@ impl Handler {
 			bh.pow.write_pre_pow(&mut writer).unwrap();
 		}
 		let pre_pow = header_buf.to_hex();
+		let current_state = self.current_state.read();
 		let job_template = JobTemplate {
 			height: bh.height,
-			job_id: (self.current_state.read().current_block_versions.len() - 1) as u64,
-			difficulty: self.current_state.read().minimum_share_difficulty,
+			job_id: (current_state.current_block_versions.len() - 1) as u64,
+			difficulty: current_state.minimum_share_difficulty,
 			pre_pow,
 		};
 		return job_template;