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Description
Bug report
Every test class in test_httpservers starts a thread to run a server. CGIHTTPServerTestCase tests trigger htt.server.CGIHTTPRequestHandler.run_cgi() which executes a CGI script in a separate process. Usingos.fork() if possible. Butos.fork() now emits a DeprecationWarning if used in multi-threaded environment, and in future it will be an error.
$ ./python -Wa -m test -v test_httpservers -m CGIHTTPServerTestCase...test_accept (test.test_httpservers.CGIHTTPServerTestCase.test_accept) ... /home/serhiy/py/cpython/Lib/http/server.py:1172: DeprecationWarning: This process (pid=2768812) is multi-threaded, use of fork() may lead to deadlocks in the child. pid = os.fork()/home/serhiy/py/cpython/Lib/http/server.py:1172: DeprecationWarning: This process (pid=2768812) is multi-threaded, use of fork() may lead to deadlocks in the child. pid = os.fork()/home/serhiy/py/cpython/Lib/http/server.py:1172: DeprecationWarning: This process (pid=2768812) is multi-threaded, use of fork() may lead to deadlocks in the child. pid = os.fork()oktest_authorization (test.test_httpservers.CGIHTTPServerTestCase.test_authorization) ... /home/serhiy/py/cpython/Lib/http/server.py:1172: DeprecationWarning: This process (pid=2768812) is multi-threaded, use of fork() may lead to deadlocks in the child. pid = os.fork()oktest_cgi_path_in_sub_directories (test.test_httpservers.CGIHTTPServerTestCase.test_cgi_path_in_sub_directories) ... /home/serhiy/py/cpython/Lib/http/server.py:1172: DeprecationWarning: This process (pid=2768812) is multi-threaded, use of fork() may lead to deadlocks in the child. pid = os.fork()ok...We should do something with this. First, the tests are polluted with presumably false alerts. Second, these alerts may be not false. Third, these tests will be broken in future, when the warning is turned into error.
Also, what actions are expected from users ofhttp.server when they see a warning? How they can solve the problem on their side? Ifhttp.server is deprecated, it should be documented. If it remains, it should not produce scary warnings.
cc@gpshead