From ee1593b77c5ffdfa7102a66eb9f3239e5f8370b6 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 28 Oct 2015 08:06:09 +0530
Subject: [PATCH] ...

---
 src/calibre/srv/loop.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/calibre/srv/loop.py b/src/calibre/srv/loop.py
index 93975fd8a1..c37a03a852 100644
--- a/src/calibre/srv/loop.py
+++ b/src/calibre/srv/loop.py
@@ -560,7 +560,11 @@ class ServerLoop(object):
             else:
                 yield s, self.connection_map[s], READ
         for s in writable:
-            yield s, self.connection_map[s], WRITE
+            try:
+                conn = self.connection_map[s]
+            except KeyError:
+                continue  # Happens if connection was closed during read phase
+            yield s, conn, WRITE
 
     def accept(self):
         try: