Noticed on NetBSD, but the same issue could happen on any other system. The issue is outputting the Reducing -maxconnections warning during startup:
Which causes the tests to abort, due to unexpected output:
0python3.9 test/functional/test_runner.py --jobs=3
1Temporary test directory at /tmp/test_runner_₿_🏃_20220104_002803
2Running Unit Tests for Test Framework Modules
3..........
4----------------------------------------------------------------------
5Ran 10 tests in 1.310s
6
7OK
8Traceback (most recent call last):
9 File "/home/ec2-user/bitcoin/test/functional/create_cache.py", line 27, in <module>
10 CreateCache().main()
11 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_framework.py", line 155, in main
12 exit_code = self.shutdown()
13 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_framework.py", line 304, in shutdown
14 self.stop_nodes()
15 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_framework.py", line 555, in stop_nodes
16 node.stop_node(wait=wait, wait_until_stopped=False)
17 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_node.py", line 336, in stop_node
18 self.stop(wait=wait)
19 File "/home/ec2-user/bitcoin/test/functional/test_framework/coverage.py", line 49, in __call__
20 return_val = self.auth_service_proxy_instance.__call__(*args, **kwargs)
21 File "/home/ec2-user/bitcoin/test/functional/test_framework/authproxy.py", line 142, in __call__
22 response, status = self._request('POST', self.__url.path, postdata.encode('utf-8'))
23 File "/home/ec2-user/bitcoin/test/functional/test_framework/authproxy.py", line 107, in _request
24 self.__conn.request(method, path, postdata, headers)
25 File "/usr/pkg/lib/python3.9/http/client.py", line 1279, in request
26 self._send_request(method, url, body, headers, encode_chunked)
27 File "/usr/pkg/lib/python3.9/http/client.py", line 1325, in _send_request
28 self.endheaders(body, encode_chunked=encode_chunked)
29 File "/usr/pkg/lib/python3.9/http/client.py", line 1274, in endheaders
30 self._send_output(message_body, encode_chunked=encode_chunked)
31 File "/usr/pkg/lib/python3.9/http/client.py", line 1034, in _send_output
32 self.send(msg)
33 File "/usr/pkg/lib/python3.9/http/client.py", line 974, in send
34 self.connect()
35 File "/usr/pkg/lib/python3.9/http/client.py", line 945, in connect
36 self.sock = self._create_connection(
37 File "/usr/pkg/lib/python3.9/socket.py", line 844, in create_connection
38 raise err
39 File "/usr/pkg/lib/python3.9/socket.py", line 832, in create_connection
40 sock.connect(sa)
41ConnectionRefusedError: [Errno 61] Connection refused
422022-01-04T00:28:04.864000Z TestFramework (INFO): Initializing test directory /tmp/test_runner_₿_🏃_20220104_002803/cache
432022-01-04T00:28:05.605000Z TestFramework (ERROR): Assertion failed
44Traceback (most recent call last):
45 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_framework.py", line 131, in main
46 self.setup()
47 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_framework.py", line 287, in setup
48 self.setup_chain()
49 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_framework.py", line 378, in setup_chain
50 self._initialize_chain()
51 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_framework.py", line 792, in _initialize_chain
52 self.stop_nodes()
53 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_framework.py", line 555, in stop_nodes
54 node.stop_node(wait=wait, wait_until_stopped=False)
55 File "/home/ec2-user/bitcoin/test/functional/test_framework/test_node.py", line 350, in stop_node
56 raise AssertionError("Unexpected stderr {} != {}".format(stderr, expected_stderr))
57AssertionError: Unexpected stderr Warning: Reducing -maxconnections from 125 to 96, because of system limitations. !=
582022-01-04T00:28:05.663000Z TestFramework (INFO): Stopping nodes
59[node 0] Cleaning up leftover process
