AttributeError: LogFileObserver instance has no attribute '_logFile'

[Zooko]

$ FLOGFILE=flog.out.bz2 FLOGLEVEL=1 FLOGTOTWISTED=1 PYTHONPATH=support/lib/python2.6/site-packages/ trial --until-failure --rterror allmydata.test.test_hung_server.HungServerDownloadTest.test_2_good_8_bro
ken_copied_share
Thu Sep  2 23:47:50 MDT 2010
Test Pass 1
allmydata.test.test_hung_server
  HungServerDownloadTest
    test_2_good_8_broken_copied_share ...                                  [OK]

-------------------------------------------------------------------------------
Ran 1 tests in 1.634s

PASSED (successes=1)
Test Pass 2
allmydata.test.test_hung_server
  HungServerDownloadTest
    test_2_good_8_broken_copied_share ... Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/eventual.py", line 26, in _turn
    cb(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/logging/log.py", line 440, in msg
    pickle.dump(e, self._logFile, 2)
exceptions.AttributeError: LogFileObserver instance has no attribute '_logFile'
[ERROR]
Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/eventual.py", line 26, in _turn
    cb(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/logging/log.py", line 440, in msg
    pickle.dump(e, self._logFile, 2)
exceptions.AttributeError: LogFileObserver instance has no attribute '_logFile'
[ERROR]
Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/eventual.py", line 26, in _turn
    cb(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/logging/log.py", line 440, in msg
    pickle.dump(e, self._logFile, 2)
exceptions.AttributeError: LogFileObserver instance has no attribute '_logFile'
[ERROR]
Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/eventual.py", line 26, in _turn
    cb(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/logging/log.py", line 440, in msg
    pickle.dump(e, self._logFile, 2)
exceptions.AttributeError: LogFileObserver instance has no attribute '_logFile'
[ERROR]
Traceback (most recent call last):
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/eventual.py", line 26, in _turn
    cb(*args, **kwargs)
  File "/Library/Python/2.6/site-packages/foolscap-0.5.1-py2.6.egg/foolscap/logging/log.py", line 440, in msg
    pickle.dump(e, self._logFile, 2)
exceptions.AttributeError: LogFileObserver instance has no attribute '_logFile'

... etc.

[Brian Warner]

FLOGFILE= is not compatible with trial --until-failure. That form of repeat-until-failure works by starting and stopping the reactor over and over within a single process, which is pretty unusual: most of the time, the reactor starts shortly after the process begins, and runs until the process terminates. FLOGFILE= only opens the logfile once, but closes it each time the reactor shuts down, which isn't a good fit for unusual reactor cycling.

I generally use a small perl script to run a single test until it fails (using a new process for each iteration). I'll attach it here.

(also, I always use a FLOGFILE= that ends in just .flog instead of .flog.bz2, because the latter is more easily lost if the process terminates unexpectedly.)

[Brian Warner]

tool to run a test program over and over until it fails

[Zooko]

I just encountered this same bug. Fortunately before spending more than a few minutes on it I duckduckgoed for it and discovered this ticket. Why doesn't FLOGFILE= flush the file when the reactor shuts down, but don't close the file?

[Zooko]

Here's a pull request for a patch that would make --until-failure work: ​https://github.com/warner/foolscap/pull/9