Issue #11444: Lock handlers while flushing/closing during shutdown.
diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index b555bbe..685efeb 100644
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -1507,12 +1507,15 @@
#errors might occur, for example, if files are locked
#we just ignore them if raiseExceptions is not set
try:
+ h.acquire()
h.flush()
h.close()
except:
if raiseExceptions:
raise
#else, swallow
+ finally:
+ h.release()
#Let's try and shutdown automatically on application exit...
try: