From e5fe7315a99377e5250a02c919f99cd58a0ace13 Mon Sep 17 00:00:00 2001
From: Paul Lange <palango@gmx.de>
Date: Thu, 31 May 2018 20:02:30 +0200
Subject: [PATCH] Close evicted sessions

---
 web3/utils/request.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/web3/utils/request.py b/web3/utils/request.py
index bd618201ca..3e5484ae9f 100644
--- a/web3/utils/request.py
+++ b/web3/utils/request.py
@@ -5,7 +5,12 @@
     generate_cache_key,
 )
 
-_session_cache = lru.LRU(8)
+
+def _remove_session(key, session):
+    session.close()
+
+
+_session_cache = lru.LRU(8, callback=_remove_session)
 
 
 def _get_session(*args, **kwargs):