From: Ben Darnell <ben@bendarnell.com>
Date: Sun, 18 Jan 2015 21:20:55 +0000 (-0500)
Subject: Work around an occasional EPROTOTYPE error on OSX.
X-Git-Tag: v4.1.0b1~19
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a6740e3101ce759590d4d7ca3ebe99e5d707abb5;p=thirdparty%2Ftornado.git

Work around an occasional EPROTOTYPE error on OSX.
---

diff --git a/tornado/iostream.py b/tornado/iostream.py
index d14ec0fdb..640198d87 100644
--- a/tornado/iostream.py
+++ b/tornado/iostream.py
@@ -68,6 +68,14 @@ _ERRNO_CONNRESET = (errno.ECONNRESET, errno.ECONNABORTED, errno.EPIPE,
 if hasattr(errno, "WSAECONNRESET"):
     _ERRNO_CONNRESET += (errno.WSAECONNRESET, errno.WSAECONNABORTED, errno.WSAETIMEDOUT)
 
+if sys.platform == 'darwin':
+    # OSX appears to have a race condition that causes send(2) to return
+    # EPROTOTYPE if called while a socket is being torn down:
+    # http://erickt.github.io/blog/2014/11/19/adventures-in-debugging-a-potential-osx-kernel-bug/
+    # Since the socket is being closed anyway, treat this as an ECONNRESET
+    # instead of an unexpected error.
+    _ERRNO_CONNRESET += (errno.EPROTOTYPE,)
+
 # More non-portable errnos:
 _ERRNO_INPROGRESS = (errno.EINPROGRESS,)