[Python-checkins] cpython (merge 3.2 -> 3.3): Issue #17208: add a note about the termination behaviour of daemon threads.

[antoine.pitrou]

http://hg.python.org/cpython/rev/917ae89e59ce
changeset:   82213:917ae89e59ce
branch:      3.3
parent:      82209:3f8b5fcbf07e
parent:      82212:8753a3be4a3c
user:        Antoine Pitrou <solipsis at pitrou.net>
date:        Fri Feb 15 21:31:33 2013 +0100
summary:
  Issue #17208: add a note about the termination behaviour of daemon threads.

files:
  Doc/library/threading.rst |  6 ++++++
  1 files changed, 6 insertions(+), 0 deletions(-)


diff --git a/Doc/library/threading.rst b/Doc/library/threading.rst
--- a/Doc/library/threading.rst
+++ b/Doc/library/threading.rst
@@ -174,6 +174,12 @@
 through the :attr:`~Thread.daemon` property or the *daemon* constructor
 argument.
 
+.. note::
+   Daemon threads are abruptly stopped at shutdown.  Their resources (such
+   as open files, database transactions, etc.) may not be released properly.
+   If you want your threads to stop gracefully, make them non-daemonic and
+   use a suitable signalling mechanism such as an :class:`Event`.
+
 There is a "main thread" object; this corresponds to the initial thread of
 control in the Python program.  It is not a daemon thread.
 

-- 
Repository URL: http://hg.python.org/cpython