TST: Ignore exception in thread warning from pytest>=6.2

[pllim]

Description

This pull request is a stop-gap fix for two SAMP test failures that started appearing around the time pytest 6.2.0 was released (about 2 days ago). We should not pin ignore this forever but I am not sure how to fix this error:

________________ ERROR at teardown of TestWebProfile.test_main _________________

cls = <class '_pytest.runner.CallInfo'>
func = <function call_runtest_hook.<locals>.<lambda> at 0x7fda56d37d30>
when = 'teardown'
reraise = (<class '_pytest.outcomes.Exit'>, <class 'KeyboardInterrupt'>)

>   ???

_pytest/runner.py:311: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
_pytest/runner.py:255: in <lambda>
    ???
pluggy/hooks.py:286: in __call__
    ???
pluggy/manager.py:93: in _hookexec
    ???
pluggy/manager.py:84: in <lambda>
    ???
_pytest/threadexception.py:90: in pytest_runtest_teardown
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   pytest.PytestUnhandledThreadExceptionWarning: Exception in thread Thread-141
E   
E   Traceback (most recent call last):
E     File "astropy/samp/utils.py", line 62, in __call__
E     File "xmlrpc/client.py", line 1109, in __call__
E     File "xmlrpc/client.py", line 1450, in __request
E     File "xmlrpc/client.py", line 1153, in request
E     File "xmlrpc/client.py", line 1169, in single_request
E     File "xmlrpc/client.py", line 1341, in parse_response
E     File "xmlrpc/client.py", line 655, in close
E   xmlrpc.client.Fault: <Fault 1: '<class \'Exception\'>:method "server_close" is not supported'>
E   
E   During handling of the above exception, another exception occurred:
E   
E   Traceback (most recent call last):
E     File "threading.py", line 932, in _bootstrap_inner
E     File "threading.py", line 870, in run
E     File "/home/runner/work/astropy/astropy/.pyinstaller/astropy_tests/samp/tests/web_profile_test_helpers.py", line 175, in _serve_forever
E       self.hub.server_close()
E     File "astropy/samp/hub_proxy.py", line 96, in server_close
E     File "astropy/samp/utils.py", line 64, in __call__
E   astropy.samp.errors.SAMPProxyError: <SAMPProxyError 1: '<class \'Exception\'>:method "server_close" is not supported'>

_pytest/threadexception.py:75: PytestUnhandledThreadExceptionWarning
---------------------------- Captured stdout setup -----------------------------
INFO: Hub set to run with Web Profile support enabled. [astropy.samp.hub]
INFO: Hub started [astropy.samp.hub]
------------------------------ Captured log setup ------------------------------
INFO     astropy:hub.py:268 Hub set to run with Web Profile support enabled.
INFO     astropy:hub.py:402 Hub started
--------------------------- Captured stdout teardown ---------------------------
INFO: Hub is stopping... [astropy.samp.hub]
INFO: Hub stopped. [astropy.samp.hub]
---------------------------- Captured log teardown -----------------------------
INFO     astropy:hub.py:471 Hub is stopping...
INFO     astropy:hub.py:497 Hub stopped.
_____________ ERROR at teardown of TestWebProfile.test_web_profile _____________

cls = <class '_pytest.runner.CallInfo'>
func = <function call_runtest_hook.<locals>.<lambda> at 0x7fda75703040>
when = 'teardown'
reraise = (<class '_pytest.outcomes.Exit'>, <class 'KeyboardInterrupt'>)

>   ???

_pytest/runner.py:311: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
_pytest/runner.py:255: in <lambda>
    ???
pluggy/hooks.py:286: in __call__
    ???
pluggy/manager.py:93: in _hookexec
    ???
pluggy/manager.py:84: in <lambda>
    ???
_pytest/threadexception.py:90: in pytest_runtest_teardown
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   pytest.PytestUnhandledThreadExceptionWarning: Exception in thread Thread-264
E   
E   Traceback (most recent call last):
E     File "astropy/samp/utils.py", line 62, in __call__
E     File "xmlrpc/client.py", line 1109, in __call__
E     File "xmlrpc/client.py", line 1450, in __request
E     File "xmlrpc/client.py", line 1153, in request
E     File "xmlrpc/client.py", line 1169, in single_request
E     File "xmlrpc/client.py", line 1341, in parse_response
E     File "xmlrpc/client.py", line 655, in close
E   xmlrpc.client.Fault: <Fault 1: '<class \'Exception\'>:method "server_close" is not supported'>
E   
E   During handling of the above exception, another exception occurred:
E   
E   Traceback (most recent call last):
E     File "threading.py", line 932, in _bootstrap_inner
E     File "threading.py", line 870, in run
E     File "/home/runner/work/astropy/astropy/.pyinstaller/astropy_tests/samp/tests/web_profile_test_helpers.py", line 175, in _serve_forever
E       self.hub.server_close()
E     File "astropy/samp/hub_proxy.py", line 96, in server_close
E     File "astropy/samp/utils.py", line 64, in __call__
E   astropy.samp.errors.SAMPProxyError: <SAMPProxyError 1: '<class \'Exception\'>:method "server_close" is not supported'>

_pytest/threadexception.py:75: PytestUnhandledThreadExceptionWarning
---------------------------- Captured stdout setup -----------------------------
INFO: Hub set to run with Web Profile support enabled. [astropy.samp.hub]
INFO: Hub started [astropy.samp.hub]
------------------------------ Captured log setup ------------------------------
INFO     astropy:hub.py:268 Hub set to run with Web Profile support enabled.
INFO     astropy:hub.py:402 Hub started
--------------------------- Captured stdout teardown ---------------------------
INFO: Hub is stopping... [astropy.samp.hub]
INFO: Hub stopped. [astropy.samp.hub]
---------------------------- Captured log teardown -----------------------------
INFO     astropy:hub.py:471 Hub is stopping...
INFO     astropy:hub.py:497 Hub stopped.
=========================== short test summary info ============================
ERROR astropy_tests/samp/tests/test_web_profile.py::TestWebProfile::test_main
ERROR astropy_tests/samp/tests/test_web_profile.py::TestWebProfile::test_web_profile
= 13777 passed, 1000 skipped, 234 deselected, 104 xfailed, 2 errors in 343.12s (0:05:43) =

This failure is currently blocking unrelated PRs from running CI to completion.

[pllim]

Hmm... Maybe this is a result of one of their "features," as follows:

pytest-dev/pytest#5299: pytest now warns about unraisable exceptions and unhandled thread exceptions that occur in tests on Python>=3.8. See unraisable for more information.

[pllim]

Remote data failure is unrelated.

[embray]

I ran into this failure too on the 4.0.x branch, so this should probably be backported. Though I might investigate whether there is a more fundamental fix.