sometimes selftest hang on win32

[Alexander Belchenko]

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bzr.dev revno.2204
selftest hangs on test_lockdir.TestLockDir.test_35_wait_lock_changing

stderr show me this traceback:

D:\Bazaar\sandbox\regression>python bzr --no-plugins selftest -v > test.log
Exception in thread Thread-97:
Traceback (most recent call last):
  File "E:\Python24\lib\threading.py", line 442, in __bootstrap
    self.run()
  File "E:\Python24\lib\threading.py", line 422, in run
    self.__target(*self.__args, **self.__kwargs)
  File "D:\Bazaar\sandbox\regression\bzrlib\tests\test_lockdir.py", line 400, in wait_and_switch
    lf1.unlock()
  File "D:\Bazaar\sandbox\regression\bzrlib\lockdir.py", line 240, in unlock
    self.transport.rename(self._held_dir, tmpname)
  File "D:\Bazaar\sandbox\regression\bzrlib\transport\local.py", line 364, in rename
    self._translate_error(e, path_from)
  File "D:\Bazaar\sandbox\regression\bzrlib\transport\__init__.py", line 241, in _translate_error
    raise errors.PermissionDenied(path, extra=e)
PermissionDenied: Permission denied:
u'D:/Bazaar/sandbox/regression/test0000.tmp/test_lockdir.TestLockDir.test_35_wait_lock_chan
ging/work/test_lock/held': [Errno 13] Permission denied


But running this test alone I don't have this traceback.

D:\Bazaar\sandbox\regression>python bzr --no-plugins selftest test_lockdir.TestLockDir.test_35_wait_lock_changing -v
       bzr: D:/Bazaar/sandbox/regression/bzr
    bzrlib: D:\Bazaar\sandbox\regression\bzrlib

running 1 tests...
test_lockdir.TestLockDir.test_35_wait_lock_changing                                                  OK
401ms

- ----------------------------------------------------------------------
Ran 1 test in 0.451s

OK
tests passed


Because there is used multiple threads I think problem
caused by some sort of racing conditions.
Note: too many similar errors I have with SFTP tests on win32.

Alexander



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