From cd4b609b7c3fe6b975db0bb0300acee8e2bec915 Mon Sep 17 00:00:00 2001
From: "A. Jesse Jiryu Davis" <jesse@mongodb.com>
Date: Mon, 7 Oct 2013 15:26:54 -0400
Subject: [PATCH] Semaphore management during connection failure. PYTHON-580

---
 pymongo/pool.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pymongo/pool.py b/pymongo/pool.py
index 237e5648c..f3e74294c 100644
--- a/pymongo/pool.py
+++ b/pymongo/pool.py
@@ -349,7 +349,8 @@ class Pool:
                 # request until end_request.
                 self._set_request_state(sock_info)
         except:
-            self._socket_semaphore.release()
+            if not forced:
+                self._socket_semaphore.release()
             raise
 
         sock_info.last_checkout = time.time()