New submission from Josh Snyder <hashbrowncip...@gmail.com>:
logging.StreamHandler contains the following code:
stream.write(msg)
stream.write(self.terminator)
stream.flush()
When sys.stderr (or whatever other stream) is unbuffered, this results in two
system calls and allows log records from different processes to concatenate on
the same line in the output stream (followed by multiple newlines). This issue
is new in Python 3.7, as stdout and stderr became "truly unbuffered" (cf.
#30404).
As a simple solution, I believe the following would fix the issue and also be
backward compatible:
stream.write(msg + self.terminator)
stream.flush()
----------
messages: 328269
nosy: josnyder
priority: normal
severity: normal
status: open
title: logging.StreamHandler performs two syscalls when one would do
type: behavior
versions: Python 3.7
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue35046>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
