[issue17208] add note/warning about daemon threads

[Antoine Pitrou]

New submission from Antoine Pitrou:

People are generally not aware of the properties of daemon threads.
I suggest to add a note such as the following:

« 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 Event. »

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assignee: docs at python
components: Documentation
messages: 182133
nosy: docs at python, pitrou, sbt
priority: normal
severity: normal
status: open
title: add note/warning about daemon threads
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17208>
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