From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Tue, 30 Aug 2022 08:58:37 +0000 (-0700)
Subject: [3.11] gh-91305: Add a note about DatagramHandler and DNS latency. (GH-96380) (GH... 
X-Git-Tag: v3.11.0rc2~48
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8e2d347183df4b4fcd2f3bd963bd7575c6db663b;p=thirdparty%2FPython%2Fcpython.git

[3.11] gh-91305: Add a note about DatagramHandler and DNS latency. (GH-96380) (GH-96401)
---

diff --git a/Doc/library/logging.handlers.rst b/Doc/library/logging.handlers.rst
index 1e61a519bc06..c4f501faca6e 100644
--- a/Doc/library/logging.handlers.rst
+++ b/Doc/library/logging.handlers.rst
@@ -572,6 +572,13 @@ over UDP sockets.
    Returns a new instance of the :class:`DatagramHandler` class intended to
    communicate with a remote machine whose address is given by *host* and *port*.
 
+   .. note:: As UDP is not a streaming protocol, there is no persistent connection
+      between an instance of this handler and *host*. For this reason, when using a
+      network socket, a DNS lookup might have to be made each time an event is
+      logged, which can introduce some latency into the system. If this affects you,
+      you can do a lookup yourself and initialize this handler using the looked-up IP
+      address rather than the hostname.
+
    .. versionchanged:: 3.4
       If ``port`` is specified as ``None``, a Unix domain socket is created
       using the value in ``host`` - otherwise, a UDP socket is created.