Repository navigation
test_urllib2net FTP tests fail on some buildbot workers #140748
Description
Bug report
On Pablo's workers, FTP tests fail with variations of the following traceback (from https://buildbot.python.org/#/builders/725/builds/12212):
Traceback (most recent call last):
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1546, in ftp_open
fp, retrlen = fw.retrfile(file, type)
~~~~~~~~~~~^^^^^^^^^^^^
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1826, in retrfile
conn, retrlen = self.ftp.ntransfercmd(cmd)
~~~~~~~~~~~~~~~~~~~~~^^^^^
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/ftplib.py", line 354, in ntransfercmd
conn = socket.create_connection((host, port), self.timeout,
source_address=self.source_address)
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 879, in create_connection
raise exceptions[0]
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/socket.py", line 864, in create_connection
sock.connect(sa)
~~~~~~~~~~~~^^^^
TimeoutError: [Errno 60] Operation timed out
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/case.py", line 58, in testPartExecutor
yield
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/case.py", line 667, in run
self._callTestMethod(testMethod)
~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/unittest/case.py", line 613, in _callTestMethod
result = method()
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 321, in test_ftp_basic
u = _urlopen_with_retry(self.FTP_HOST)
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 28, in wrapped
return _retry_thrice(func, exc, *args, **kwargs)
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 24, in _retry_thrice
raise last_exc
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/test/test_urllib2net.py", line 20, in _retry_thrice
return func(*args, **kwargs)
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 187, in urlopen
return opener.open(url, data, timeout)
~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 487, in open
response = self._open(req, data)
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 504, in _open
result = self._call_chain(self.handle_open, protocol, protocol +
'_open', req)
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 464, in _call_chain
result = func(*args)
File "/Users/buildbot/buildarea/3.x.pablogsal-macos-m1.macos-with-brew/build/Lib/urllib/request.py", line 1556, in ftp_open
raise URLError(f"ftp error: {exp}") from exp
urllib.error.URLError: <urlopen error ftp error: [Errno 60] Operation timed out
Activity
gh-140748: socket_helper.transient_internet: Unwrap UrlError.__cause__ (
StanFromIreland commented on Nov 8, 2025
These tests are now skipped on the affected buildbots (I changed ISPs and the same issue popped up on mine) in python/buildmaster-config@0af8926.
pythongh-140748: socket_helper.transient_internet: Unwrap UrlError.__…
pythongh-140748: socket_helper.transient_internet: Unwrap UrlError.__…
[3.14] gh-140748: socket_helper.transient_internet: Unwrap UrlError._…
[3.13] gh-140748: socket_helper.transient_internet: Unwrap UrlError._…
pythongh-140748: socket_helper.transient_internet: Unwrap UrlError.__…
vstinner commented on Mar 16, 2026
test_urllib2net failed on "AMD64 Arch Linux Usan Function 3.13": https://buildbot.python.org/#/builders/1601/builds/687
I created python/buildmaster-config#684 to skip network tests on this worker.
test_ftp_timeout (test.test_urllib2net.TimeoutTest.test_ftp_timeout) ... Timeout (0:20:00)! Thread 0x000074b731261100 (most recent call first): File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/socket.py", line 849 in create_connection File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/ftplib.py", line 354 in ntransfercmd File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/urllib/request.py", line 2469 in retrfile File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/urllib/request.py", line 1549 in ftp_open File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/urllib/request.py", line 466 in _call_chain File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/urllib/request.py", line 506 in _open File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/urllib/request.py", line 489 in open File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/urllib/request.py", line 189 in urlopen File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/test/test_urllib2net.py", line 25 in _retry_thrice File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/test/test_urllib2net.py", line 33 in wrapped File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.clang-ubsan-function/build/Lib/test/test_urllib2net.py", line 412 in test_ftp_timeout ... 1 test failed again: test_urllib2net