Comment #10 on issue 995 by pekka.klarck: Mac OS X: IOError: [Errno 35]
Resource temporarily unavailable
http://code.google.com/p/robotframework/issues/detail?id=995
I'm looking at this again after some time. It seems to me that the original
problem and the problem in comment #6 are not the same. The former fails
with error `IOError: [Errno 35] Resource temporarily unavailable` when
writing to real stderr (actually __stderr__), and the latter fails with
`ValueError: I/O operation on closed file` when writing to stdout (or
stderr) replaced with StringIO that has been closed.
I'm still trying to understand do these problems occur because Robot does
something stupid or are they caused by bugs/features in the underlying I/O
implementation or some other external reasons. With the latter problem I
think it's pretty fair to guess that the root cause is Robot bug but the
former could also be caused by someone else.
The mechanism to start execution and how to open/close internal loggers
have changed during RF 2.7 development. Some problems that could have
caused at least the latter problem have been fixed. If the original problem
was caused by our bug, it may also have been resolved.
Could you, Filip, try RF 2.7 beta 1 (or forthcoming beta 2) without your
patches and see do you still encounter the problems you have reported? If
you do, it would be great if you could try modifying the code of the
framework like suggested in my above comment. That way we ought to get more
information about the failure and hopefully understand it better. Based on
the results we then can try to fix the actual problem or add your patch as
a workaround for external bugs/features.
Notice that after the changes the code mentioned in the above comment has
moved and now lives, refactored, in `robot/utils/application.py`. You
should change its `_execute` method to contain this:
def _execute(self, arguments, options):
try:
rc = self.main(arguments, **options)
except DataError, err:
return self._report_error(unicode(err), help=True)
except (KeyboardInterrupt, SystemExit):
return self._report_error('Execution stopped by user.',
rc=STOPPED_BY_USER)
except:
raise # <----------- THIS WAS ADDED -----------
error, details = get_error_details()
return self._report_error('Unexpected error: %s' % error,
details, rc=FRAMEWORK_ERROR)
else:
return rc or 0
