[issue16244] TimedRotatingFileHandler forces "write" mode, should use "append"

[axil]

axil added the comment:

This fix breaks the behavior of RotatingFileHandler.

Maxbytes>0 can now be only used with backupCount>0 otherwise it is ignored.

So all programs that are using Maxbytes>0 and backupCount=0 are now facing an infinitely growing logfile.

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nosy: +axil
type: behavior -> resource usage
versions: +Python 2.7
Added file: http://bugs.python.org/file33085/test.py

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<http://bugs.python.org/issue16244>
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