Network operation (socket.getfqdn) takes too long on macos-latest

[flikka]

It appears that the reason quite a few of the tests in tests/ert/unit_tests/services/test_storage_service.py takes very long time (and some fail) is that the socket.getfqdn() command takes long time (or perhaps times out?).

This is used quite a few places, and some of the certificate and connection tests touches this. Perhaps relevant: https://github.com/actions/runner-images/issues/8649

NOTE: It might even "fail" after eg. 30 seconds? Should be investigated. How to reproduce: Make a simple unit test, and run it on the runner (eg. on private fork or by running the mac runner on PR).

import socket

from ert.services._storage_main import _get_host_list
from ert.shared import net_utils


def test_get_host_list():
    hosts = _get_host_list()
    assert len(hosts) > 0
    print(hosts)


def test_socket_gethostname():
    print(socket.gethostname())


def test_socket_getfqdn():
    print(socket.getfqdn())


def test_get_machine_name():
    print(net_utils.get_machine_name())

When running this (ish) on ubuntu-latest and macos-latest, with durations and -svv option to pytest:

Ubuntu (looks fine):

tests/ert/fqdn_test/test_fqdn.py::test_get_host_list Host list ['runnervmf4ws1.n2uxqdsfspmehakds0m4kccnuc.phxx.internal.cloudapp.net', 'runnervmf4ws1']
PASSED
tests/ert/fqdn_test/test_fqdn.py::test_socket_gethostname gethostname runnervmf4ws1
PASSED
tests/ert/fqdn_test/test_fqdn.py::test_socket_getfqdn getfqdn runnervmf4ws1.n2uxqdsfspmehakds0m4kccnuc.phxx.internal.cloudapp.net
PASSED
tests/ert/fqdn_test/test_fqdn.py::test_get_machine_name net_utils runnervmf4ws1
PASSED

============================== slowest durations ===============================
0.00s setup    tests/ert/fqdn_test/test_fqdn.py::test_get_host_list
0.00s call     tests/ert/fqdn_test/test_fqdn.py::test_get_host_list
0.00s setup    tests/ert/fqdn_test/test_fqdn.py::test_socket_gethostname
0.00s setup    tests/ert/fqdn_test/test_fqdn.py::test_socket_getfqdn
0.00s setup    tests/ert/fqdn_test/test_fqdn.py::test_get_machine_name
0.00s teardown tests/ert/fqdn_test/test_fqdn.py::test_get_machine_name
0.00s teardown tests/ert/fqdn_test/test_fqdn.py::test_get_host_list
0.00s teardown tests/ert/fqdn_test/test_fqdn.py::test_socket_gethostname
0.00s teardown tests/ert/fqdn_test/test_fqdn.py::test_socket_getfqdn
0.00s call     tests/ert/fqdn_test/test_fqdn.py::test_socket_getfqdn
0.00s call     tests/ert/fqdn_test/test_fqdn.py::test_get_machine_name
0.00s call     tests/ert/fqdn_test/test_fqdn.py::test_socket_gethostname
============================== 4 passed in 0.90s ===============================

Macos (slow and different):

tests/ert/fqdn_test/test_fqdn.py::test_get_host_list Host list ['localhost', 'Mac-1757918302460.local']
PASSED
tests/ert/fqdn_test/test_fqdn.py::test_socket_gethostname gethostname Mac-1757918302460.local
PASSED
tests/ert/fqdn_test/test_fqdn.py::test_socket_getfqdn getfqdn Mac-1757918302460.local
PASSED
tests/ert/fqdn_test/test_fqdn.py::test_get_machine_name net_utils localhost
PASSED

============================== slowest durations ===============================
70.03s call     tests/ert/fqdn_test/test_fqdn.py::test_get_host_list
35.02s call     tests/ert/fqdn_test/test_fqdn.py::test_socket_getfqdn
0.01s setup    tests/ert/fqdn_test/test_fqdn.py::test_get_host_list
0.01s setup    tests/ert/fqdn_test/test_fqdn.py::test_get_machine_name
0.00s teardown tests/ert/fqdn_test/test_fqdn.py::test_socket_getfqdn
0.00s teardown tests/ert/fqdn_test/test_fqdn.py::test_get_host_list
0.00s setup    tests/ert/fqdn_test/test_fqdn.py::test_socket_gethostname
0.00s teardown tests/ert/fqdn_test/test_fqdn.py::test_get_machine_name
0.00s call     tests/ert/fqdn_test/test_fqdn.py::test_get_machine_name
0.00s call     tests/ert/fqdn_test/test_fqdn.py::test_socket_gethostname
0.00s setup    tests/ert/fqdn_test/test_fqdn.py::test_socket_getfqdn
0.00s teardown tests/ert/fqdn_test/test_fqdn.py::test_socket_gethostname
======================== 4 passed in 106.11s (0:01:46) =========================

[flikka]

Fixed by #11822

[flikka]

Not going to fix this, too weird, and not very important

[flikka]

Reopen - since it WILL pop up again, and this may serve as a reminder? We have still some tests that run, slowly, and is because of this.

[frode-aarstad]

Can confirm that this is still an issue with macos 15.7.1 and python 3.12, 3.13. If anything even slower.

============================= slowest 10 durations =============================
140.07s call     tests/ert/slow_mac_test.py::test_get_host_list
35.03s call     tests/ert/slow_mac_test.py::test_socket_getfqdn
0.01s setup    tests/ert/slow_mac_test.py::test_get_host_list
0.01s setup    tests/ert/slow_mac_test.py::test_socket_gethostname
0.00s setup    tests/ert/slow_mac_test.py::test_get_machine_name
0.00s call     tests/ert/slow_mac_test.py::test_socket_gethostname
0.00s teardown tests/ert/slow_mac_test.py::test_socket_getfqdn
0.00s teardown tests/ert/slow_mac_test.py::test_get_host_list
0.00s teardown tests/ert/slow_mac_test.py::test_get_machine_name
0.00s setup    tests/ert/slow_mac_test.py::test_socket_getfqdn
======================== 4 passed in 176.38s (0:02:56) =========================