[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[bms]

bms  added the comment:

Hi,

I've committed a fix to FreeBSD-CURRENT for POSIX semaphores this morning.

Root cause analysis on the fork-mt issue points towards the rtld and
malloc in RELENG_7 not being able to deal with a mixture of fork and mt.

As a workaround, you may wish to try my patches against the FreeBSD port
to build with GNU Pth (until we can settle on resolution):-
http://people.freebsd.org/~bms/dump/python26-fbsd-pth.patch

thanks!
BMS

--
nosy: +bms

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Martin v. Löwis]

Martin v. Löwis  added the comment:

Backported to 2.5 as r67734.

--
nosy: +loewis
resolution:  -> fixed
status: open -> closed

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Martin v. Löwis]

Changes by Martin v. Löwis <[EMAIL PROTECTED]>:


--
priority: high -> release blocker

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Antoine Pitrou]

Antoine Pitrou <[EMAIL PROTECTED]> added the comment:

Ok, so it's not a release blocker anymore :)

--
priority: release blocker -> high

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Gregory P. Smith]

Gregory P. Smith <[EMAIL PROTECTED]> added the comment:

looks like it already has been merged in py3k.

--
versions: +Python 2.5.3 -Python 3.0

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Antoine Pitrou]

Antoine Pitrou <[EMAIL PROTECTED]> added the comment:

Apparently this can be merged in py3k. 

(in
http://www.python.org/dev/buildbot/trunk/x86%20FreeBSD%20trunk/builds/1589/step-test/0
:

[...]
test_threading
[18218 refs]
[18576 refs]
[17539 refs]
[17539 refs]
[17539 refs]
Skipping test_3_join_in_forked_from_thread due to known OS bugs on freebsd6
[...])

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Barry A. Warsaw]

Changes by Barry A. Warsaw <[EMAIL PROTECTED]>:


--
priority: deferred blocker -> release blocker

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Martin v. Löwis]

Changes by Martin v. Löwis <[EMAIL PROTECTED]>:


--
priority: release blocker -> deferred blocker

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Gregory P. Smith]

Gregory P. Smith <[EMAIL PROTECTED]> added the comment:

marking release blocker for 3.0, the patch just needs to be merged after
it runs through any existing trunk freebsd buildbot(s).

--
priority: normal -> release blocker

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Gregory P. Smith]

Gregory P. Smith <[EMAIL PROTECTED]> added the comment:

r66703 in trunk (2.6) applies the test_threading_fbsd6.py.patch modified
to also print a note to stderr when skipping the test and adds a mention
of buggy OSes in the os.fork documentation.

still needs merging over to 3.0 and possibly 2.5.

--
assignee:  -> gregory.p.smith
versions:  -Python 2.6

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Hirokazu Yamamoto]

Hirokazu Yamamoto <[EMAIL PROTECTED]> added the comment:

Cygwin1.5 also hangs on test_3_join_in_forked_from_thread.
Cygwin1.7 + following snapshot doesn't hang but
http://cygwin.com/snapshots/cygwin1-20080929.dll.bz2
fails with following message.

==
FAIL: test_3_join_in_forked_from_thread (__main__.ThreadJoinOnShutdown)
--
Traceback (most recent call last):
  File "Lib/test/test_threading.py", line 400, in
test_3_join_in_forked_from_thr
ead
self._run_and_join(script)
  File "Lib/test/test_threading.py", line 342, in _run_and_join
self.assertEqual(data, "end of main\nend of thread\n")
AssertionError: '' != 'end of main\nend of thread\n'

If stdout is unbuffered mode,
$ export PYTHONUNBUFFERED=x
test passes.

--
nosy: +ocean-city

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Andrew I MacIntyre]

Andrew I MacIntyre <[EMAIL PROTECTED]> added the comment:

I believe this issue ties into the underlying problem FreeBSD 6.x upto
and including 6.3R have with fork() in a threaded application - see the
6.3R errata notice referenced in issue3864.

The issue should be fixed in FreeBSD 6.4 (currently in beta), but it
would be nice to get the patch in to Python 2.6 and Python 3.0 (not sure
about 2.5) just so that running the test doesn't hang on earlier 6.x
releases.

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Andrew I MacIntyre]

Andrew I MacIntyre <[EMAIL PROTECTED]> added the comment:

I've attached a simple patch which deactivates
test_3_join_in_forked_from_thread on FreeBSD 6.x and earlier, and also
OS/2 EMX.  With this patch, test_threading completes but...

$ ./python -E -tt Lib/test/regrtest.py test_threading
test_threading
1 test OK.
Unhandled exception in thread started by
Error in sys.excepthook:

Original exception was:

--
keywords: +patch
Added file: http://bugs.python.org/file11495/test_threading_fbsd6.py.patch

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Andrew I MacIntyre]

Andrew I MacIntyre <[EMAIL PROTECTED]> added the comment:

test_threading also passes on FreeBSD 7.0 i386.

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Andrew I MacIntyre]

Andrew I MacIntyre <[EMAIL PROTECTED]> added the comment:

I've briefly got a FreeBSD 7.0 amd64 setup available, and test_threading
passes in this environment.

Short term fix I'd suggest is to only disable this part of the test for
FreeBSD 6.x and earlier (ie platforms freebsd4, freebsd5, freebsd6).

I also checked my OS/2 EMX build and wasn't surprised to see it fail on
the same part of test_threading - fork() on OS/2 EMX is fragile enough
without threads in the mix.

If a disabler is added for FreeBSD as above, 'os2emx' should be in the
same list.

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Gregory P. Smith]

Gregory P. Smith <[EMAIL PROTECTED]> added the comment:

instrumenting Python/thread_pthread.h and turning on thread debugging in
Python/thread.c, FreeBSD raises the Fatal error within pthread_create().

I'm inclined to say that this is a FreeBSD 6.3 bug.  The
fbsd_thr_crash.py test case is a good way to reproduce the problem.  I'd
imagine a similar bit of C code could be written.

What should we do in Python for this?  Just disable this unit test on
FreeBSD?

--
priority: high -> normal

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Gregory P. Smith]

Gregory P. Smith <[EMAIL PROTECTED]> added the comment:

attaching a stand alone script to exercise the bug.  based on the
prints, the error appears to happen during the t.start() call to launch
the joiningfunc() thread from the child processes worker thread (its the
main/only thread in the child process so far).

Added file: http://bugs.python.org/file11492/fbsd_thr_crash.py

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Gregory P. Smith]

Gregory P. Smith <[EMAIL PROTECTED]> added the comment:

and as expected, also happens with py3k.

--
versions: +Python 3.0

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Gregory P. Smith]

Changes by Gregory P. Smith <[EMAIL PROTECTED]>:


--
nosy: +gregory.p.smith

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue3863] 2.6rc1: test_threading hangs on FreeBSD 6.3 i386

[Andrew I MacIntyre]

Andrew I MacIntyre <[EMAIL PROTECTED]> added the comment:

I should add that this is a regression of the trunk, as I built and
tested the trunk from an SVN checkout (r63892) in early June and didn't
encounter this issue.

___
Python tracker <[EMAIL PROTECTED]>

___
___
Python-bugs-list mailing list
Unsubscribe: 
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com