diff options
Diffstat (limited to 'Doc/library/logging.handlers.rst')
| -rw-r--r-- | Doc/library/logging.handlers.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Doc/library/logging.handlers.rst b/Doc/library/logging.handlers.rst index 8f3aa1dfdd0..d74ef73ee28 100644 --- a/Doc/library/logging.handlers.rst +++ b/Doc/library/logging.handlers.rst @@ -1059,6 +1059,15 @@ possible, while any potentially slow operations (such as sending an email via .. note:: If you are using :mod:`multiprocessing`, you should avoid using :class:`~queue.SimpleQueue` and instead use :class:`multiprocessing.Queue`. + .. warning:: + + The :mod:`multiprocessing` module uses an internal logger created and + accessed via :meth:`~multiprocessing.get_logger`. + :class:`multiprocessing.Queue` will log ``DEBUG`` level messages upon + items being queued. If those log messages are processed by a + :class:`QueueHandler` using the same :class:`multiprocessing.Queue` instance, + it will cause a deadlock or infinite recursion. + .. method:: emit(record) Enqueues the result of preparing the LogRecord. Should an exception |