From b7e3b4d7307713fa8edd73889b9c72fbfd11fdfe Mon Sep 17 00:00:00 2001
From: Barry Warsaw
Date: Mon, 29 Dec 2014 17:50:07 -0500
Subject: Back port from py3 branch:

 # Explicitly prevent flufl.lock from propagating its log messages
 # to its root logger, i.e. the console.
---
 src/mailman/core/logging.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mailman/core/logging.py b/src/mailman/core/logging.py
index c9285af92..c5ce1a538 100644
--- a/src/mailman/core/logging.py
+++ b/src/mailman/core/logging.py
@@ -145,6 +145,9 @@ def initialize(propagate=None):
             continue
         if sub_name == 'locks':
             log = logging.getLogger('flufl.lock')
+            # Explicitly prevent flufl.lock from propagating its log messages
+            # to its root logger, i.e. the console.
+            log.propagate = False
         if sub_name == 'database':
             # Set both the SQLAlchemy and Alembic logs to the mailman.database
             # log configuration, essentially ignoring the alembic.cfg settings.
-- 
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