Clear the NODELAY flag in set_nodelay(False).

diff --git a/tornado/iostream.py b/tornado/iostream.py
index 064193dee2ef52cfb9dc8147b85ee739aac351ed..7a5c380da2397949022c7ca3fe457899bb384d03 100644 (file)
--- a/tornado/iostream.py
+++ b/tornado/iostream.py
@@ -743,7 +743,7 @@ class IOStream(BaseIOStream):
         if (self.socket is not None and
             self.socket.family in (socket.AF_INET, socket.AF_INET6)):
             self.socket.setsockopt(socket.IPPROTO_TCP,
-                                   socket.TCP_NODELAY, 1)
+                                   socket.TCP_NODELAY, 1 if value else 0)
 
 
 class SSLIOStream(IOStream):