[Python-Dev] Mysterious Python pyc file corruption problems

Ethan Furman ethan at stoneleaf.us
Thu May 16 18:44:55 CEST 2013

On 05/16/2013 09:38 AM, Barry Warsaw wrote:
> Hash: SHA256
> On May 16, 2013, at 06:22 PM, Christian Heimes wrote:
>> Are you able to reproduce the issue? Perhaps you could use inotify to
>> track down file activity. It shouldn't affect timing much and you can
>> track if more than one process it writing to the same file.
> Sadly, no.  I've never seen it on any of my own desktops or servers, and none
> of the bug reporters have been able to provide a reproducible test case.  I
> tried some smaller test cases to see if I could trigger pyc writing race
> conditions, but failed to reproduce it there either.

Is it happening on the same machines?  If so, perhaps a daemon to monitor those files and then scream and shout when one 
changes.  Might help track down what's going on at the time.  (Yeah, that does sound like saying 'inotify' but with more 


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