New submission from Bob Igo:
I am aware of the described behavior of fileConfig() when
disable_existing_loggers is True, but what I am seeing happens whether
disable_existing_loggers is True or False, and it also affects loggers obtained
via future, fresh calls to getLogger(name).
Here's an example where disable_existing_loggers is True, but as I said, the
same happens when it's False:
>>> import logging.config
>>> logging.config.fileConfig('unit_test_logging.conf')
>>> logger = logging.getLogger("foo")
>>> logger.critical("test")
2013-03-21 23:33:04,621fooCRITICALtest
>>> logging.config.fileConfig('unit_test_logging.conf')
>>> logger = logging.getLogger("foo")
>>> logger.critical("test")
>>>
Note that the final logging attempt silently fails. The thing that appears to
break logging for ever is the second fileConfig() call, and not the following
getLogger() call.
I can get a fresh logger with a different name and use it. (Continued from the
above session):
>>> logger = logging.getLogger("bar")
>>> logger.critical("test")
2013-03-21 23:38:35,613barCRITICALtest
This issue does not affect the root logger, when no name is given to
getLogger():
>>> import logging.config
>>> logging.config.fileConfig('unit_test_logging.conf')
>>> logger = logging.getLogger()
>>> logger.critical("test")
2013-03-22 11:49:29,957rootCRITICALtest
>>> logging.config.fileConfig('unit_test_logging.conf')
>>> logger = logging.getLogger()
>>> logger.critical("test")
2013-03-22 11:49:44,966rootCRITICALtest
However, it _does_ affect the root logger when "root" is given as the name to
getLogger():
>>> import logging.config
>>> logging.config.fileConfig('unit_test_logging.conf')
>>> logger = logging.getLogger("root")
>>> logger.critical("test")
2013-03-22 12:42:49,742 rootCRITICALtest
>>> logging.config.fileConfig('unit_test_logging.conf')
>>> logger = logging.getLogger("root")
>>> logger.critical("test")
>>>
I can attach the logging config file if desired, but it looks like the issue is
unrelated. I will say that I'm relying on the root logger for all my logging,
but that I use a different name to differentiate how the log is written.
--
components: Library (Lib)
messages: 184982
nosy: Bob.Igo
priority: normal
severity: normal
status: open
title: fileConfig() disables any previously-used "named" loggers, even when
getLogger() is called again.
type: behavior
versions: Python 2.7
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Python tracker
<http://bugs.python.org/issue17521>
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