test_uuid test_ifconfig_getnode fails with Temporary failure in name resolution

[xnox]

BPO	23170
Nosy	@bitdancer, @xnox

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2015-01-05.18:24:30.169>
created_at = <Date 2015-01-05.17:12:35.279>
labels = ['build', 'expert-installation']
title = 'test_uuid test_ifconfig_getnode fails with Temporary failure in name resolution'
updated_at = <Date 2015-01-05.18:24:30.167>
user = 'https://github.com/xnox'

bugs.python.org fields:

activity = <Date 2015-01-05.18:24:30.167>
actor = 'r.david.murray'
assignee = 'none'
closed = True
closed_date = <Date 2015-01-05.18:24:30.169>
closer = 'r.david.murray'
components = ['Installation']
creation = <Date 2015-01-05.17:12:35.279>
creator = 'xnox'
dependencies = []
files = []
hgrepos = []
issue_num = 23170
keywords = []
message_count = 5.0
messages = ['233467', '233469', '233471', '233472', '233474']
nosy_count = 2.0
nosy_names = ['r.david.murray', 'xnox']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue23170'
versions = ['Python 3.4']

[xnox]

Building 3.4.2, running testsuite on linux,
test_uuid test_ifconfig_getnode fails as following:

[365/388] test_uuid
Warning -- sys.path was modified by test_site
test test_uuid failed -- Traceback (most recent call last):
  File "/builddir/build/BUILD/Python-3.4.2/Lib/test/test_uuid.py", line 318, in test_ifconfig_getnode
    node = uuid._ifconfig_getnode()
  File "/builddir/build/BUILD/Python-3.4.2/Lib/uuid.py", line 356, in _ifconfig_getnode
    ip_addr = socket.gethostbyname(socket.gethostname())
socket.gaierror: [Errno -3] Temporary failure in name resolution

Note that "Use of the 'network' resource not enabled"

[bitdancer]

That traceback doesn't match the uuid.py source, nor has _ifconfig_getnode been modified for quite some time. A line like your traceback says is in _ifconfig_getnode actually appears in _arp_getnode. The arp_getnode test would presumably have the same problem, since it is also not protected by either; however, that call to socket in uuid.py, which is the only such call in the file, is protected by a try/except for OSError, so no error should be bubbling up from it.

Can you investigate further, please?

[xnox]

The source code matches 3.4.2 tarball exactly.

There is no arp_getnode test that I can see.

316 @unittest.skipUnless(os.name == 'posix', 'requires Posix')
317 def test_ifconfig_getnode(self):
318 node = uuid._ifconfig_getnode()
319 if node is not None:
320 self.check_node(node, 'ifconfig')

346def _ifconfig_getnode():
347 """Get the hardware address on Unix by running ifconfig."""
348
349 # This works on Linux ('' or '-a'), Tru64 ('-av'), but not all Unixes.
350 for args in ('', '-a', '-av'):
351 mac = _find_mac('ifconfig', args, ['hwaddr', 'ether'], lambda i: i+1)
352 if mac:
353 return mac
354
355 import socket
356 ip_addr = socket.gethostbyname(socket.gethostname())
357
358 # Try getting the MAC addr from arp based on our IP address (Solaris).
359 mac = _find_mac('arp', '-an', [ip_addr], lambda i: -1)
360 if mac:
361 return mac
362
363 # This might work on HP-UX.
364 mac = _find_mac('lanscan', '-ai', ['lan0'], lambda i: 0)
365 if mac:
366 return mac
367
368 return None

And I do not see any try/except protections around it.

[xnox]

I guess this is related to http://bugs.python.org/issue17293 however I get a test-suite fail / exception there with 3.4.2 on Linux.

[bitdancer]

Ah, I see what happened. Serhiy split _ifconfig_getnode, so when I did an hg annotate it looked like _ifconfig_getnode was untouched, but in fact it had been split to create the _arp_getnode function.

So, this report is out of date, this has already been fixed in 3.4.