diff -r 0259c2c555fb Lib/socketserver.py
--- a/Lib/socketserver.py	Fri Dec 04 14:52:07 2015 -0800
+++ b/Lib/socketserver.py	Mon Feb 22 21:52:41 2016 +0100
@@ -760,4 +760,8 @@
         self.wfile = BytesIO()
 
     def finish(self):
-        self.socket.sendto(self.wfile.getvalue(), self.client_address)
+        try:
+            self.socket.sendto(self.wfile.getvalue(), self.client_address)
+        except FileNotFoundError:
+            # Can occur with Unix domain sockets if client is already gone
+            pass