From 3d9134d13e2e1f41294d4fc4a8447ce085536529 Mon Sep 17 00:00:00 2001
From: Jarred Nicholls <jarred.nicholls@gmail.com>
Date: Fri, 30 Aug 2019 11:26:16 -0400
Subject: [PATCH] executor: shut down idle threads in the blocking pool (#1514)

---
 tokio-executor/src/blocking.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tokio-executor/src/blocking.rs b/tokio-executor/src/blocking.rs
index 1c589c741..b24be56fa 100644
--- a/tokio-executor/src/blocking.rs
+++ b/tokio-executor/src/blocking.rs
@@ -109,12 +109,16 @@ fn spawn_thread() {
                 shared.num_idle += 1;
 
                 loop {
-                    shared = POOL.condvar.wait_timeout(shared, KEEP_ALIVE).unwrap().0;
+                    let lock_result = POOL.condvar.wait_timeout(shared, KEEP_ALIVE).unwrap();
+                    shared = lock_result.0;
+                    let timeout_result = lock_result.1;
 
                     if let Some(task) = shared.queue.pop_front() {
                         drop(shared);
                         run_task(task);
                         continue 'outer;
+                    } else if timeout_result.timed_out() {
+                        break 'outer;
                     }
                 }
             }