[Python-Dev] [Python-checkins] Python Regression Test Failures all (1) (original) (raw)

Tim Peters tim.peters at gmail.com
Fri Mar 31 18:47:59 CEST 2006

[Neal Norwitz] """ test_bsddb3 Exception in thread reader 4: Traceback (most recent call last): File "/home/neal/python/trunk/Lib/threading.py", line 473, in __bootstrap self.run() File "/home/neal/python/trunk/Lib/threading.py", line 453, in run self.__target(*self.__args, *self.__kwargs) File "/home/neal/python/trunk/Lib/bsddb/test/test_thread.py", line 275, in readerThread rec = dbutils.DeadlockWrap(c.next, max_retries=10) File "/home/neal/python/trunk/Lib/bsddb/dbutils.py", line 62, in DeadlockWrap return function(_args, **_kwargs) DBLockDeadlockError: (-30996, 'DB_LOCK_DEADLOCK: Locker killed to resolve a deadlock') Exception in thread writer 0: Traceback (most recent call last): File "/home/neal/python/trunk/Lib/threading.py", line 473, in __bootstrap self.run() File "/home/neal/python/trunk/Lib/threading.py", line 453, in run self.__target(*self.__args, **self.__kwargs) File "/home/neal/python/trunk/Lib/bsddb/test/test_thread.py", line 254, in writerThread self.assertEqual(data, self.makeData(key)) File "/home/neal/python/trunk/Lib/unittest.py", line 334, in failUnlessEqual (msg or '%r != %r' % (first, second)) AssertionError: None != '0003-0003-0003-0003-0003'

[and so on] """

[Jeremy Hylton]

I haven't run regrtest.py -u all in a while. Are these sorts of errors just tolerated?

test_bsddb3 has always failed in these ways, and I believe on all platforms, although on my WinXP box it only happens if my box is heavily loaded with other stuff. Normally a DBLockDeadlockError doesn't even cause the test to fail, presumably because the exception occurs in a thread unittest doesn't know about (you'll recall the convolutions we endured to get unittest to notice errors in ZODB/ZEO test threads).

For example, here's a recent buildbot run where test_bsddb3 passed despite a DBLockDeadlockError:

http://www.python.org/dev/buildbot/all/x86%20gentoo%20trunk/builds/223/step-test/0

The prospects for fixing it appear dim; PCbuild/readme.txt has noted for years "I'm told that DBLockDeadlockError is expected at times".

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