Message 333526 - Python tracker

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Author	David Ruggles
Recipients	David Ruggles
Date	2019-01-12.13:55:13
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1547301313.72.0.148950825212.issue35726@roundup.psfhosted.org>
In-reply-to

Content
ISSUE: if you add a formatter to QueueHandler any subsequently added handlers will get the formatting added to QueueHandler CAUSE: as best as I can tell, the code here: https://github.com/python/cpython/blob/d586ccb04f79863c819b212ec5b9d873964078e4/Lib/logging/handlers.py#L1380 is modifying the record object so when it get passed to the next handler here: https://github.com/python/cpython/blob/d586ccb04f79863c819b212ec5b9d873964078e4/Lib/logging/__init__.py#L1656 it includes the formatting applied by the QueueHandler's formatter. I worked around this issue by moving my formatter from the QueueHandler to the QueueListener I've attached a simple example of the issue NOTE: I marked this as Python 3.7 because that's what I'm using, but I looked at github and the code is in master so I assume this affects 3.8 too.

ISSUE: if you add a formatter to QueueHandler any subsequently added handlers will get the formatting added to QueueHandler

CAUSE: as best as I can tell, the code here:
https://github.com/python/cpython/blob/d586ccb04f79863c819b212ec5b9d873964078e4/Lib/logging/handlers.py#L1380
is modifying the record object so when it get passed to the next handler here:
https://github.com/python/cpython/blob/d586ccb04f79863c819b212ec5b9d873964078e4/Lib/logging/__init__.py#L1656
it includes the formatting applied by the QueueHandler's formatter.

I worked around this issue by moving my formatter from the QueueHandler to the QueueListener

I've attached a simple example of the issue

NOTE: I marked this as Python 3.7 because that's what I'm using, but I looked at github and the code is in master so I assume this affects 3.8 too.

History
Date	User	Action	Args
2019-01-12 13:55:17	David Ruggles	set	recipients: + David Ruggles
2019-01-12 13:55:13	David Ruggles	set	messageid: <1547301313.72.0.148950825212.issue35726@roundup.psfhosted.org>
2019-01-12 13:55:13	David Ruggles	link	issue35726 messages
2019-01-12 13:55:13	David Ruggles	create