homepage

http://buildbot.python.org/all/builders/x86%20Windows7%203.x/builds/597/steps/test/logs/stdio
0:26:29 [156/405/1] test_multiprocessing_main_handling failed
...
test_zipfile_compiled (test.test_multiprocessing_main_handling.ForkServerCmdLineTest) ... skipped "'forkserver' start method not available"
test_basic_script (test.test_multiprocessing_main_handling.SpawnCmdLineTest) ... ok
test_basic_script_no_suffix (test.test_multiprocessing_main_handling.SpawnCmdLineTest) ... FAIL
test_directory (test.test_multiprocessing_main_handling.SpawnCmdLineTest) ... ok
test_directory_compiled (test.test_multiprocessing_main_handling.SpawnCmdLineTest) ... ok
test_ipython_workaround (test.test_multiprocessing_main_handling.SpawnCmdLineTest) ... ok
...
======================================================================
FAIL: test_basic_script_no_suffix (test.test_multiprocessing_main_handling.SpawnCmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\test_multiprocessing_main_handling.py", line 169, in test_basic_script_no_suffix
 self._check_script(script_name)
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\test_multiprocessing_main_handling.py", line 157, in _check_script
 rc, out, err = assert_python_ok(*run_args, __isolated=False)
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\support\script_helper.py", line 147, in assert_python_ok
 return _assert_python(True, *args, **env_vars)
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\support\script_helper.py", line 133, in _assert_python
 err))
AssertionError: Process return code is 1
command line: ['D:\\cygwin\\home\\db3l\\buildarea\3円.x.bolen-windows7\\build\\PCbuild\\win32\\python_d.exe', '-X', 'faulthandler', '-E', 'd:\\temp\\tmp3iu335w1\\script', 'spawn']
stdout:
---
---
stderr:
---
Traceback (most recent call last):
 File "d:\temp\tmp3iu335w1\script", line 34, in <module>
 raise RuntimeError("Timed out waiting for results")
RuntimeError: Timed out waiting for results
---
----------------------------------------------------------------------
Ran 39 tests in 81.399s
FAILED (failures=1, skipped=26)
test test_multiprocessing_main_handling failed

New changeset 7d6320ba47a229543acc0af6a64bc4e414932273 by Victor Stinner in branch 'master':
bpo-30339: test_multiprocessing_main_handling timeout (#1593)
https://github.com/python/cpython/commit/7d6320ba47a229543acc0af6a64bc4e414932273

> New changeset 7d6320ba47a229543acc0af6a64bc4e414932273 by Victor Stinner in branch 'master':
> bpo-30339: test_multiprocessing_main_handling timeout (#1593)
> https://github.com/python/cpython/commit/7d6320ba47a229543acc0af6a64bc4e414932273
Sadly, a new build failed at commit fca224f117d25bdfec1bf7160b67438c4fcf6dee, so with the new timeout of 60 seconds:
http://buildbot.python.org/all/builders/x86%20Windows7%203.x/builds/619/steps/test/logs/stdio 

Another failure on AMD64 Windows7 SP1 3.5:
http://buildbot.python.org/all/builders/AMD64%20Windows7%20SP1%203.5/builds/145/steps/test/logs/stdio
======================================================================
FAIL: test_directory (test.test_multiprocessing_main_handling.SpawnCmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 197, in test_directory
 self._check_script(script_dir)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 155, in _check_script
 rc, out, err = assert_python_ok(*run_args, __isolated=False)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 150, in assert_python_ok
 return _assert_python(True, *args, **env_vars)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 136, in _assert_python
 err))
AssertionError: Process return code is 1
command line: ['C:\\buildbot.python.org\3円.5.kloth-win64\\build\\PCbuild\\amd64\\python_d.exe', '-X', 'faulthandler', '-E', 'C:\\Users\\Buildbot\\AppData\\Local\\Temp\\tmpld1_lj4t', 'spawn']
stdout:
---
---
stderr:
---
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 193, in _run_module_as_main
 "__main__", mod_spec)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 85, in _run_code
 exec(code, run_globals)
 File "C:\Users\Buildbot\AppData\Local\Temp\tmpld1_lj4t\__main__.py", line 23, in <module>
 raise RuntimeError("Timed out waiting for results")
RuntimeError: Timed out waiting for results
---

Patch on issue30317 also addresses this issue in a more flexible way.

New failure:
http://buildbot.python.org/all/builders/AMD64%20Windows7%20SP1%203.5/builds/161/steps/test/logs/stdio
======================================================================
FAIL: test_directory (test.test_multiprocessing_main_handling.SpawnCmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 197, in test_directory
 self._check_script(script_dir)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 155, in _check_script
 rc, out, err = assert_python_ok(*run_args, __isolated=False)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 150, in assert_python_ok
 return _assert_python(True, *args, **env_vars)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 136, in _assert_python
 err))
AssertionError: Process return code is 1
command line: ['C:\\buildbot.python.org\3円.5.kloth-win64\\build\\PCbuild\\amd64\\python_d.exe', '-X', 'faulthandler', '-E', 'C:\\Users\\Buildbot\\AppData\\Local\\Temp\\tmpa4gpo3nq', 'spawn']
stdout:
---
---
stderr:
---
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 193, in _run_module_as_main
 "__main__", mod_spec)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 85, in _run_code
 exec(code, run_globals)
 File "C:\Users\Buildbot\AppData\Local\Temp\tmpa4gpo3nq\__main__.py", line 23, in <module>
 raise RuntimeError("Timed out waiting for results")
RuntimeError: Timed out waiting for results
---

Added PR1978 that resolves this issue on my buildbot at least. Note that it is against 3.5 as that is the branch that has the issue, it seems.
I'm guessing improvements in startup time on newer Pythons is why it doesn't occur for them.

Following up as the last run on my 3.5 buildslave:
 http://buildbot.python.org/all/builders/AMD64%20Windows7%20SP1%203.5/builds/198
had the timeout again. It is running at a 50% success rate with the only fault being warnings/errors due to this test.

Similar but difference issue.
http://buildbot.python.org/all/builders/AMD64%20Windows7%20SP1%203.5/builds/215/steps/test/logs/stdio
======================================================================
FAIL: test_directory_compiled (test.test_multiprocessing_main_handling.SpawnCmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 207, in test_directory_compiled
 self._check_script(script_dir)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 155, in _check_script
 rc, out, err = assert_python_ok(*run_args, __isolated=False)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 150, in assert_python_ok
 return _assert_python(True, *args, **env_vars)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 136, in _assert_python
 err))
AssertionError: Process return code is 1
command line: ['C:\\buildbot.python.org\3円.5.kloth-win64\\build\\PCbuild\\amd64\\python_d.exe', '-X', 'faulthandler', '-E', 'C:\\Users\\Buildbot\\AppData\\Local\\Temp\\tmp47s9eead', 'spawn']
stdout:
---
---
stderr:
---
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 193, in _run_module_as_main
 "__main__", mod_spec)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 85, in _run_code
 exec(code, run_globals)
 File "C:\Users\Buildbot\AppData\Local\Temp\tmp47s9eead\__main__.py", line 23, in <module>
RuntimeError: Timed out waiting for results
---
Second run:
======================================================================
FAIL: test_directory (test.test_multiprocessing_main_handling.SpawnCmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 197, in test_directory
 self._check_script(script_dir)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 155, in _check_script
 rc, out, err = assert_python_ok(*run_args, __isolated=False)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 150, in assert_python_ok
 return _assert_python(True, *args, **env_vars)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 136, in _assert_python
 err))
AssertionError: Process return code is 1
command line: ['C:\\buildbot.python.org\3円.5.kloth-win64\\build\\PCbuild\\amd64\\python_d.exe', '-X', 'faulthandler', '-E', 'C:\\Users\\Buildbot\\AppData\\Local\\Temp\\tmp3hfxysdu', 'spawn']
stdout:
---
---
stderr:
---
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 193, in _run_module_as_main
 "__main__", mod_spec)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 85, in _run_code
 exec(code, run_globals)
 File "C:\Users\Buildbot\AppData\Local\Temp\tmp3hfxysdu\__main__.py", line 23, in <module>
 raise RuntimeError("Timed out waiting for results")
RuntimeError: Timed out waiting for results
---
======================================================================
FAIL: test_directory_compiled (test.test_multiprocessing_main_handling.SpawnCmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 207, in test_directory_compiled
 self._check_script(script_dir)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 155, in _check_script
 rc, out, err = assert_python_ok(*run_args, __isolated=False)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 150, in assert_python_ok
 return _assert_python(True, *args, **env_vars)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 136, in _assert_python
 err))
AssertionError: Process return code is 1
command line: ['C:\\buildbot.python.org\3円.5.kloth-win64\\build\\PCbuild\\amd64\\python_d.exe', '-X', 'faulthandler', '-E', 'C:\\Users\\Buildbot\\AppData\\Local\\Temp\\tmpvez1m7b1', 'spawn']
stdout:
---
---
stderr:
---
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 193, in _run_module_as_main
 "__main__", mod_spec)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 85, in _run_code
 exec(code, run_globals)
 File "C:\Users\Buildbot\AppData\Local\Temp\tmpvez1m7b1\__main__.py", line 23, in <module>
RuntimeError: Timed out waiting for results
---

http://buildbot.python.org/all/builders/AMD64%20Windows7%20SP1%203.5/builds/229/steps/test/logs/stdio
======================================================================
FAIL: test_directory (test.test_multiprocessing_main_handling.SpawnCmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 197, in test_directory
 self._check_script(script_dir)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\test_multiprocessing_main_handling.py", line 155, in _check_script
 rc, out, err = assert_python_ok(*run_args, __isolated=False)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 150, in assert_python_ok
 return _assert_python(True, *args, **env_vars)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\test\support\script_helper.py", line 136, in _assert_python
 err))
AssertionError: Process return code is 1
command line: ['C:\\buildbot.python.org\3円.5.kloth-win64\\build\\PCbuild\\amd64\\python_d.exe', '-X', 'faulthandler', '-E', 'C:\\Users\\Buildbot\\AppData\\Local\\Temp\\tmp7w5hs4kq', 'spawn']
stdout:
---
---
stderr:
---
Traceback (most recent call last):
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 193, in _run_module_as_main
 "__main__", mod_spec)
 File "C:\buildbot.python.org3円.5.kloth-win64\build\lib\runpy.py", line 85, in _run_code
 exec(code, run_globals)
 File "C:\Users\Buildbot\AppData\Local\Temp\tmp7w5hs4kq\__main__.py", line 23, in <module>
 raise RuntimeError("Timed out waiting for results")
RuntimeError: Timed out waiting for results
---

Yet another similar bug on "x86 Windows7 3.x":
http://buildbot.python.org/all/#/builders/58/builds/134
======================================================================
FAIL: test_ipython_workaround (test.test_multiprocessing_main_handling.SpawnCmdLineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\test_multiprocessing_main_handling.py", line 179, in test_ipython_workaround
 self._check_script(script_name)
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\test_multiprocessing_main_handling.py", line 156, in _check_script
 rc, out, err = assert_python_ok(*run_args, __isolated=False)
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\support\script_helper.py", line 151, in assert_python_ok
 return _assert_python(True, *args, **env_vars)
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\support\script_helper.py", line 137, in _assert_python
 res.fail(cmd_line)
 File "D:\cygwin\home\db3l\buildarea3円.x.bolen-windows7\build\lib\test\support\script_helper.py", line 79, in fail
 err))
AssertionError: Process return code is 1
command line: ['D:\\cygwin\\home\\db3l\\buildarea\3円.x.bolen-windows7\\build\\PCbuild\\win32\\python_d.exe', '-X', 'faulthandler', '-E', 'd:\\temp\\tmponku8v2m\\ipython.py', 'spawn']
stdout:
---
---
stderr:
---
Traceback (most recent call last):
 File "d:\temp\tmponku8v2m\ipython.py", line 23, in <module>
 raise RuntimeError("Timed out waiting for results")
RuntimeError: Timed out waiting for results
---

TLDR; but there is a new status for the associated PR https://github.com/python/cpython/pull/1978 

New changeset 64737e9ae2081e529935ecf07f44e89f362d1c4b by Victor Stinner in branch 'master':
bpo-33913: Fix test_multiprocessing_main_handling (GH-7972)
https://github.com/python/cpython/commit/64737e9ae2081e529935ecf07f44e89f362d1c4b

New changeset 4b1d286ac06f32a5857af1b3141dd4127744b15b by Miss Islington (bot) in branch '3.7':
bpo-33913: Fix test_multiprocessing_main_handling (GH-7972)
https://github.com/python/cpython/commit/4b1d286ac06f32a5857af1b3141dd4127744b15b

New changeset 1d06be8cc55715be8c32ec3b462adfb3a7839dfe by Victor Stinner in branch '3.6':
bpo-33913: Fix test_multiprocessing_main_handling (GH-7972) (GH-7976)
https://github.com/python/cpython/commit/1d06be8cc55715be8c32ec3b462adfb3a7839dfe

I increased timeout from 10 seconds to 1 minute in test_multiprocessing_main_handling, in 3.6, 3.7 and master branches. It should make test failures less likely on buildbots.