Does a security scanner crash worker threads (again)?

[AzureIP]

Hi,

We already had the case that a security scanner, which send on purpose strange SSL request, was able to chrash worker threads. If all worker threads are crashed, the server is not responsible anymore. Which is in the end a denail of service attack.

Relevant Issues were:
#365
and
cherrypy/cherrypy#1989

Those issues were fixed in 10.0.1

Now I run exactly this version and I notice a similar occurence. Please have a look at those two logs and tell me, if this is alright, and if server threads were killed.

No1

12.02. 00:00:51  ENGINE Client ('10.119.227.172', 2590) lost — peer dropped the TLS connection suddenly, during handshake: _ssl.c:983: The handshake operation timed out
12.02. 00:00:56  ENGINE Client ('10.119.227.172', 5712) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:00:56  ENGINE Client ('10.119.227.172', 5738) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
12.02. 00:00:56  ENGINE Client ('10.119.227.172', 5750) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNEXPECTED_MESSAGE] unexpected message (_ssl.c:1000)')
12.02. 00:00:56  ENGINE Client ('10.119.227.172', 5758) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:00:58  ENGINE Client ('10.119.227.172', 6028) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1000)')
12.02. 00:00:58  ENGINE socket.error 8
12.02. 00:00:58 Traceback (most recent call last):
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1291, in communicate
12.02. 00:00:58     req.respond()
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1081, in respond
12.02. 00:00:58     self.server.gateway(self).respond()
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/wsgi.py", line 141, in respond
12.02. 00:00:58     self.write(chunk)
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/wsgi.py", line 221, in write
12.02. 00:00:58     self.req.ensure_headers_sent()
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1128, in ensure_headers_sent
12.02. 00:00:58     self.send_headers()
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1228, in send_headers
12.02. 00:00:58     self.conn.wfile.write(EMPTY.join(buf))
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
12.02. 00:00:58     res = super().write(val, *args, **kwargs)
12.02. 00:00:58           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
12.02. 00:00:58     self._flush_unlocked()
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
12.02. 00:00:58     n = self.raw.write(bytes(self._write_buf))
12.02. 00:00:58         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
12.02. 00:00:58     return self._sock.send(b)
12.02. 00:00:58            ^^^^^^^^^^^^^^^^^^
12.02. 00:00:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
12.02. 00:00:58     return self._sslobj.write(data)
12.02. 00:00:58            ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:00:58 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11554) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1000)')
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11590) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11594) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNKNOWN_PROTOCOL] unknown protocol (_ssl.c:1000)')
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11596) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNKNOWN_PROTOCOL] unknown protocol (_ssl.c:1000)')
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11600) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11602) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11606) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11608) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:01:11  ENGINE Client ('10.119.227.172', 11612) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:01:12  ENGINE Client ('10.119.227.172', 11850) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:01:13  ENGINE Client ('10.119.227.172', 11856) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:15  ENGINE Client ('10.119.227.172', 12714) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:15  ENGINE Client ('10.119.227.172', 12730) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: BAD_EXTENSION] bad extension (_ssl.c:1000)')
12.02. 00:01:15  ENGINE Client ('10.119.227.172', 12732) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: BAD_EXTENSION] bad extension (_ssl.c:1000)')
12.02. 00:01:15  ENGINE Client ('10.119.227.172', 12734) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: BAD_EXTENSION] bad extension (_ssl.c:1000)')
12.02. 00:01:16  ENGINE Client ('10.119.227.172', 12740) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:17  ENGINE Client ('10.119.227.172', 12742) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:17  ENGINE Client ('10.119.227.172', 12752) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:17  ENGINE Client ('10.119.227.172', 12778) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:18  ENGINE Client ('10.119.227.172', 13042) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:18  ENGINE Client ('10.119.227.172', 13048) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:19  ENGINE Client ('10.119.227.172', 13054) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:19  ENGINE Client ('10.119.227.172', 13356) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:19  ENGINE Client ('10.119.227.172', 13706) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:19  ENGINE Client ('10.119.227.172', 13732) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:20  ENGINE Client ('10.119.227.172', 13742) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:20  ENGINE Client ('10.119.227.172', 14356) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:01:21  ENGINE Client ('10.119.227.172', 14360) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:21  ENGINE Client ('10.119.227.172', 14376) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:21  ENGINE Client ('10.119.227.172', 14378) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:21  ENGINE Client ('10.119.227.172', 14454) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:21  ENGINE Client ('10.119.227.172', 14458) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:23  ENGINE Client ('10.119.227.172', 14924) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:24  ENGINE Client ('10.119.227.172', 15438) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:24  ENGINE Client ('10.119.227.172', 15494) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:25  ENGINE Client ('10.119.227.172', 15586) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:25  ENGINE Client ('10.119.227.172', 16058) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:26  ENGINE Client ('10.119.227.172', 16532) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:26  ENGINE Client ('10.119.227.172', 16558) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:26  ENGINE Client ('10.119.227.172', 16574) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:26  ENGINE Client ('10.119.227.172', 17170) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:26  ENGINE Client ('10.119.227.172', 17172) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SUITABLE_SIGNATURE_ALGORITHM] no suitable signature algorithm (_ssl.c:1000)')
12.02. 00:01:27  ENGINE Client ('10.119.227.172', 17186) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:37  ENGINE Client ('10.119.227.172', 17228) lost — peer dropped the TLS connection suddenly, during handshake: _ssl.c:983: The handshake operation timed out
12.02. 00:01:47  ENGINE Client ('10.119.227.172', 18440) lost — peer dropped the TLS connection suddenly, during handshake: _ssl.c:983: The handshake operation timed out
12.02. 00:01:47  ENGINE Client ('10.119.227.172', 18450) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:47  ENGINE Client ('10.119.227.172', 18480) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:52  ENGINE Client ('10.119.227.172', 19102) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
12.02. 00:01:52  ENGINE Client ('10.119.227.172', 19782) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:52  ENGINE Client ('10.119.227.172', 20570) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:52  ENGINE Client ('10.119.227.172', 23438) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:52  ENGINE Client ('10.119.227.172', 26710) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
12.02. 00:01:52  ENGINE Client ('10.119.227.172', 26712) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:52  ENGINE Client ('10.119.227.172', 26778) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:53  ENGINE Client ('10.119.227.172', 26934) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:53  ENGINE Client ('10.119.227.172', 27016) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:01:54  ENGINE Client ('10.119.227.172', 27078) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:55  ENGINE Client ('10.119.227.172', 27262) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:56  ENGINE Client ('10.119.227.172', 27410) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:01:56  ENGINE Client ('10.119.227.172', 27414) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
12.02. 00:02:07  ENGINE Client ('10.119.227.172', 29302) attempted to speak plain HTTP into a TCP connection configured for TLS-only traffic — trying to send back a plain HTTP error response: (1, '[SSL: HTTP_REQUEST] http request (_ssl.c:1000)')
12.02. 00:02:20  ENGINE socket.error 8
12.02. 00:02:20 Traceback (most recent call last):
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1281, in communicate
12.02. 00:02:20     req.parse_request()
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 714, in parse_request
12.02. 00:02:20     success = self.read_request_line()
12.02. 00:02:20               ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 773, in read_request_line
12.02. 00:02:20     self.simple_response(
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
12.02. 00:02:20     self.conn.wfile.write(EMPTY.join(buf))
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
12.02. 00:02:20     res = super().write(val, *args, **kwargs)
12.02. 00:02:20           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
12.02. 00:02:20     self._flush_unlocked()
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
12.02. 00:02:20     n = self.raw.write(bytes(self._write_buf))
12.02. 00:02:20         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
12.02. 00:02:20     return self._sock.send(b)
12.02. 00:02:20            ^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
12.02. 00:02:20     return self._sslobj.write(data)
12.02. 00:02:20            ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)
12.02. 00:02:20  ENGINE Unhandled error while processing an incoming connection SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:2406)')
12.02. 00:02:20 Traceback (most recent call last):
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1281, in communicate
12.02. 00:02:20     req.parse_request()
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 714, in parse_request
12.02. 00:02:20     success = self.read_request_line()
12.02. 00:02:20               ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 773, in read_request_line
12.02. 00:02:20     self.simple_response(
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
12.02. 00:02:20     self.conn.wfile.write(EMPTY.join(buf))
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
12.02. 00:02:20     res = super().write(val, *args, **kwargs)
12.02. 00:02:20           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
12.02. 00:02:20     self._flush_unlocked()
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
12.02. 00:02:20     n = self.raw.write(bytes(self._write_buf))
12.02. 00:02:20         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
12.02. 00:02:20     return self._sock.send(b)
12.02. 00:02:20            ^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
12.02. 00:02:20     return self._sslobj.write(data)
12.02. 00:02:20            ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)
12.02. 00:02:20 During handling of the above exception, another exception occurred:
12.02. 00:02:20 Traceback (most recent call last):
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/workers/threadpool.py", line 166, in _process_connections_until_interrupted
12.02. 00:02:20     keep_conn_open = conn.communicate()
12.02. 00:02:20                      ^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1310, in communicate
12.02. 00:02:20     self._conditional_error(req, '500 Internal Server Error')
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1353, in _conditional_error
12.02. 00:02:20     req.simple_response(response)
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
12.02. 00:02:20     self.conn.wfile.write(EMPTY.join(buf))
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
12.02. 00:02:20     res = super().write(val, *args, **kwargs)
12.02. 00:02:20           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
12.02. 00:02:20     self._flush_unlocked()
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
12.02. 00:02:20     n = self.raw.write(bytes(self._write_buf))
12.02. 00:02:20         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
12.02. 00:02:20     return self._sock.send(b)
12.02. 00:02:20            ^^^^^^^^^^^^^^^^^^
12.02. 00:02:20   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
12.02. 00:02:20     return self._sslobj.write(data)
12.02. 00:02:20            ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:20 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)
12.02. 00:02:44  ENGINE ValueError('"\'xwork.MethodAccessor.denyMethodExecution\'" does not appear to be an IPv4 or IPv6 address')
12.02. 00:02:44 Traceback (most recent call last):
12.02. 00:02:44   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1281, in communicate
12.02. 00:02:44     req.parse_request()
12.02. 00:02:44   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 714, in parse_request
12.02. 00:02:44     success = self.read_request_line()
12.02. 00:02:44               ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:44   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 815, in read_request_line
12.02. 00:02:44     scheme, authority, path, qs, fragment = urllib.parse.urlsplit(uri)
12.02. 00:02:44                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:44   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/urllib/parse.py", line 500, in urlsplit
12.02. 00:02:44     _check_bracketed_host(bracketed_host)
12.02. 00:02:44   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/urllib/parse.py", line 446, in _check_bracketed_host
12.02. 00:02:44     ip = ipaddress.ip_address(hostname) # Throws Value Error if not IPv6 or IPv4
12.02. 00:02:44          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:44   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ipaddress.py", line 54, in ip_address
12.02. 00:02:44     raise ValueError(f'{address!r} does not appear to be an IPv4 or IPv6 address')
12.02. 00:02:44 ValueError: "'xwork.MethodAccessor.denyMethodExecution'" does not appear to be an IPv4 or IPv6 address
12.02. 00:02:45  ENGINE Client ('10.119.227.172', 33066) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:02:45  ENGINE Client ('10.119.227.172', 33070) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SUITABLE_SIGNATURE_ALGORITHM] no suitable signature algorithm (_ssl.c:1000)')
12.02. 00:02:45  ENGINE Client ('10.119.227.172', 33076) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
12.02. 00:02:45  ENGINE Client ('10.119.227.172', 33078) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:02:46  ENGINE Client ('10.119.227.172', 33200) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
12.02. 00:02:58  ENGINE socket.error 8
12.02. 00:02:58 Traceback (most recent call last):
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 978, in read_request_headers
12.02. 00:02:58     self.header_reader(self.rfile, self.inheaders)
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 204, in __call__
12.02. 00:02:58     raise ValueError('Illegal end of headers.')
12.02. 00:02:58 ValueError: Illegal end of headers.
12.02. 00:02:58 During handling of the above exception, another exception occurred:
12.02. 00:02:58 Traceback (most recent call last):
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1281, in communicate
12.02. 00:02:58     req.parse_request()
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 727, in parse_request
12.02. 00:02:58     success = self.read_request_headers()
12.02. 00:02:58               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 980, in read_request_headers
12.02. 00:02:58     self.simple_response('400 Bad Request', ex.args[0])
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
12.02. 00:02:58     self.conn.wfile.write(EMPTY.join(buf))
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
12.02. 00:02:58     res = super().write(val, *args, **kwargs)
12.02. 00:02:58           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
12.02. 00:02:58     self._flush_unlocked()
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
12.02. 00:02:58     n = self.raw.write(bytes(self._write_buf))
12.02. 00:02:58         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
12.02. 00:02:58     return self._sock.send(b)
12.02. 00:02:58            ^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
12.02. 00:02:58     return self._sslobj.write(data)
12.02. 00:02:58            ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)
12.02. 00:02:58  ENGINE Unhandled error while processing an incoming connection SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:2406)')
12.02. 00:02:58 Traceback (most recent call last):
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 978, in read_request_headers
12.02. 00:02:58     self.header_reader(self.rfile, self.inheaders)
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 204, in __call__
12.02. 00:02:58     raise ValueError('Illegal end of headers.')
12.02. 00:02:58 ValueError: Illegal end of headers.
12.02. 00:02:58 During handling of the above exception, another exception occurred:
12.02. 00:02:58 Traceback (most recent call last):
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1281, in communicate
12.02. 00:02:58     req.parse_request()
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 727, in parse_request
12.02. 00:02:58     success = self.read_request_headers()
12.02. 00:02:58               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 980, in read_request_headers
12.02. 00:02:58     self.simple_response('400 Bad Request', ex.args[0])
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
12.02. 00:02:58     self.conn.wfile.write(EMPTY.join(buf))
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
12.02. 00:02:58     res = super().write(val, *args, **kwargs)
12.02. 00:02:58           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
12.02. 00:02:58     self._flush_unlocked()
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
12.02. 00:02:58     n = self.raw.write(bytes(self._write_buf))
12.02. 00:02:58         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
12.02. 00:02:58     return self._sock.send(b)
12.02. 00:02:58            ^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
12.02. 00:02:58     return self._sslobj.write(data)
12.02. 00:02:58            ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)
12.02. 00:02:58 During handling of the above exception, another exception occurred:
12.02. 00:02:58 Traceback (most recent call last):
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/workers/threadpool.py", line 166, in _process_connections_until_interrupted
12.02. 00:02:58     keep_conn_open = conn.communicate()
12.02. 00:02:58                      ^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1310, in communicate
12.02. 00:02:58     self._conditional_error(req, '500 Internal Server Error')
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1353, in _conditional_error
12.02. 00:02:58     req.simple_response(response)
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
12.02. 00:02:58     self.conn.wfile.write(EMPTY.join(buf))
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
12.02. 00:02:58     res = super().write(val, *args, **kwargs)
12.02. 00:02:58           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
12.02. 00:02:58     self._flush_unlocked()
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
12.02. 00:02:58     n = self.raw.write(bytes(self._write_buf))
12.02. 00:02:58         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
12.02. 00:02:58     return self._sock.send(b)
12.02. 00:02:58            ^^^^^^^^^^^^^^^^^^
12.02. 00:02:58   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
12.02. 00:02:58     return self._sslobj.write(data)
12.02. 00:02:58            ^^^^^^^^^^^^^^^^^^^^^^^^
12.02. 00:02:58 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)

No2

11.12. 00:21:43  ENGINE Client ('10.119.227.172', 10734) lost — peer dropped the TLS connection suddenly, during handshake: _ssl.c:983: The handshake operation timed out
11.12. 00:21:47  ENGINE Client ('10.119.227.172', 12778) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:21:47  ENGINE Client ('10.119.227.172', 12788) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
11.12. 00:21:48  ENGINE Client ('10.119.227.172', 12798) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNEXPECTED_MESSAGE] unexpected message (_ssl.c:1000)')
11.12. 00:21:48  ENGINE Client ('10.119.227.172', 12812) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:21:50  ENGINE Client ('10.119.227.172', 13404) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1000)')
11.12. 00:22:06  ENGINE Client ('10.119.227.172', 20144) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:22:12  ENGINE Client ('10.119.227.172', 22298) attempted to speak plain HTTP into a TCP connection configured for TLS-only traffic — trying to send back a plain HTTP error response: (1, '[SSL: HTTP_REQUEST] http request (_ssl.c:1000)')
11.12. 00:22:29  ENGINE Client ('10.119.227.172', 24718) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1000)')
11.12. 00:22:29  ENGINE Client ('10.119.227.172', 24742) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:29  ENGINE Client ('10.119.227.172', 24744) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNKNOWN_PROTOCOL] unknown protocol (_ssl.c:1000)')
11.12. 00:22:29  ENGINE Client ('10.119.227.172', 24746) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNKNOWN_PROTOCOL] unknown protocol (_ssl.c:1000)')
11.12. 00:22:30  ENGINE Client ('10.119.227.172', 24754) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
11.12. 00:22:30  ENGINE Client ('10.119.227.172', 24756) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
11.12. 00:22:30  ENGINE Client ('10.119.227.172', 24758) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:22:30  ENGINE Client ('10.119.227.172', 24760) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:22:30  ENGINE Client ('10.119.227.172', 24762) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:22:30  ENGINE Client ('10.119.227.172', 24764) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:22:31  ENGINE Client ('10.119.227.172', 24766) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:34  ENGINE Client ('10.119.227.172', 25328) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:22:34  ENGINE Client ('10.119.227.172', 25332) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:34  ENGINE Client ('10.119.227.172', 25334) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:35  ENGINE Client ('10.119.227.172', 25336) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:35  ENGINE Client ('10.119.227.172', 25340) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:22:36  ENGINE Client ('10.119.227.172', 25342) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:37  ENGINE Client ('10.119.227.172', 25344) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:38  ENGINE Client ('10.119.227.172', 25350) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:39  ENGINE Client ('10.119.227.172', 25354) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:40  ENGINE Client ('10.119.227.172', 25360) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:40  ENGINE Client ('10.119.227.172', 25364) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: BAD_EXTENSION] bad extension (_ssl.c:1000)')
11.12. 00:22:40  ENGINE Client ('10.119.227.172', 25366) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:22:41  ENGINE Client ('10.119.227.172', 25368) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:42  ENGINE Client ('10.119.227.172', 25386) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: BAD_EXTENSION] bad extension (_ssl.c:1000)')
11.12. 00:22:42  ENGINE Client ('10.119.227.172', 25388) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: BAD_EXTENSION] bad extension (_ssl.c:1000)')
11.12. 00:22:43  ENGINE Client ('10.119.227.172', 25390) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:44  ENGINE Client ('10.119.227.172', 25394) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:47  ENGINE Client ('10.119.227.172', 25418) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:49  ENGINE Client ('10.119.227.172', 25450) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:22:49  ENGINE Client ('10.119.227.172', 25452) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
11.12. 00:22:49  ENGINE Client ('10.119.227.172', 25458) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:50  ENGINE Client ('10.119.227.172', 25462) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:50  ENGINE Client ('10.119.227.172', 25464) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:22:52  ENGINE Client ('10.119.227.172', 25522) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:22:52  ENGINE Client ('10.119.227.172', 25534) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:22:52  ENGINE Client ('10.119.227.172', 25538) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:22:52  ENGINE Client ('10.119.227.172', 25540) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:23:02  ENGINE Client ('10.119.227.172', 25542) lost — peer dropped the TLS connection suddenly, during handshake: _ssl.c:983: The handshake operation timed out
11.12. 00:23:12  ENGINE Client ('10.119.227.172', 25544) lost — peer dropped the TLS connection suddenly, during handshake: _ssl.c:983: The handshake operation timed out
11.12. 00:23:12  ENGINE Client ('10.119.227.172', 25554) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
11.12. 00:23:12  ENGINE Client ('10.119.227.172', 25560) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
11.12. 00:23:22  ENGINE Client ('10.119.227.172', 25562) lost — peer dropped the TLS connection suddenly, during handshake: _ssl.c:983: The handshake operation timed out
11.12. 00:23:22  ENGINE Client ('10.119.227.172', 25566) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:23:22  ENGINE Client ('10.119.227.172', 25570) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
11.12. 00:23:22  ENGINE Client ('10.119.227.172', 25608) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:23:24  ENGINE Client ('10.119.227.172', 25808) lost — peer dropped the TLS connection suddenly, during handshake: (104, 'Connection reset by peer')
11.12. 00:23:24  ENGINE Client ('10.119.227.172', 26082) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
11.12. 00:23:24  ENGINE Client ('10.119.227.172', 26478) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
11.12. 00:23:24  ENGINE Client ('10.119.227.172', 26670) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:23:24  ENGINE Client ('10.119.227.172', 26668) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
11.12. 00:23:24  ENGINE Client ('10.119.227.172', 26672) lost — peer dropped the TLS connection suddenly, during handshake: (107, 'Closed before TLS handshake with data in recv buffer.')
11.12. 00:23:25  ENGINE Client ('10.119.227.172', 26676) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:23:26  ENGINE Client ('10.119.227.172', 26680) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:23:26  ENGINE Client ('10.119.227.172', 26684) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:23:27  ENGINE Client ('10.119.227.172', 26688) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1000)')
11.12. 00:23:41  ENGINE ValueError('"\'xwork.MethodAccessor.denyMethodExecution\'" does not appear to be an IPv4 or IPv6 address')
11.12. 00:23:41 Traceback (most recent call last):
11.12. 00:23:41   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1281, in communicate
11.12. 00:23:41     req.parse_request()
11.12. 00:23:41   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 714, in parse_request
11.12. 00:23:41     success = self.read_request_line()
11.12. 00:23:41               ^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:41   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 815, in read_request_line
11.12. 00:23:41     scheme, authority, path, qs, fragment = urllib.parse.urlsplit(uri)
11.12. 00:23:41                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:41   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/urllib/parse.py", line 500, in urlsplit
11.12. 00:23:41     _check_bracketed_host(bracketed_host)
11.12. 00:23:41   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/urllib/parse.py", line 446, in _check_bracketed_host
11.12. 00:23:41     ip = ipaddress.ip_address(hostname) # Throws Value Error if not IPv6 or IPv4
11.12. 00:23:41          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:41   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ipaddress.py", line 54, in ip_address
11.12. 00:23:41     raise ValueError(f'{address!r} does not appear to be an IPv4 or IPv6 address')
11.12. 00:23:41 ValueError: "'xwork.MethodAccessor.denyMethodExecution'" does not appear to be an IPv4 or IPv6 address
11.12. 00:23:41  ENGINE Client ('10.119.227.172', 26854) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:23:41  ENGINE Client ('10.119.227.172', 26858) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: NO_SUITABLE_SIGNATURE_ALGORITHM] no suitable signature algorithm (_ssl.c:1000)')
11.12. 00:23:41  ENGINE Client ('10.119.227.172', 26862) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: VERSION_TOO_LOW] version too low (_ssl.c:1000)')
11.12. 00:23:41  ENGINE Client ('10.119.227.172', 26864) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:23:42  ENGINE Client ('10.119.227.172', 27110) lost — peer dropped the TLS connection suddenly, during handshake: (1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1000)')
11.12. 00:23:48  ENGINE socket.error 8
11.12. 00:23:48 Traceback (most recent call last):
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 978, in read_request_headers
11.12. 00:23:48     self.header_reader(self.rfile, self.inheaders)
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 204, in __call__
11.12. 00:23:48     raise ValueError('Illegal end of headers.')
11.12. 00:23:48 ValueError: Illegal end of headers.
11.12. 00:23:48 During handling of the above exception, another exception occurred:
11.12. 00:23:48 Traceback (most recent call last):
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1281, in communicate
11.12. 00:23:48     req.parse_request()
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 727, in parse_request
11.12. 00:23:48     success = self.read_request_headers()
11.12. 00:23:48               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 980, in read_request_headers
11.12. 00:23:48     self.simple_response('400 Bad Request', ex.args[0])
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
11.12. 00:23:48     self.conn.wfile.write(EMPTY.join(buf))
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
11.12. 00:23:48     res = super().write(val, *args, **kwargs)
11.12. 00:23:48           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
11.12. 00:23:48     self._flush_unlocked()
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
11.12. 00:23:48     n = self.raw.write(bytes(self._write_buf))
11.12. 00:23:48         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
11.12. 00:23:48     return self._sock.send(b)
11.12. 00:23:48            ^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
11.12. 00:23:48     return self._sslobj.write(data)
11.12. 00:23:48            ^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)
11.12. 00:23:48  ENGINE Unhandled error while processing an incoming connection SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:2406)')
11.12. 00:23:48 Traceback (most recent call last):
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 978, in read_request_headers
11.12. 00:23:48     self.header_reader(self.rfile, self.inheaders)
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 204, in __call__
11.12. 00:23:48     raise ValueError('Illegal end of headers.')
11.12. 00:23:48 ValueError: Illegal end of headers.
11.12. 00:23:48 During handling of the above exception, another exception occurred:
11.12. 00:23:48 Traceback (most recent call last):
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1281, in communicate
11.12. 00:23:48     req.parse_request()
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 727, in parse_request
11.12. 00:23:48     success = self.read_request_headers()
11.12. 00:23:48               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 980, in read_request_headers
11.12. 00:23:48     self.simple_response('400 Bad Request', ex.args[0])
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
11.12. 00:23:48     self.conn.wfile.write(EMPTY.join(buf))
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
11.12. 00:23:48     res = super().write(val, *args, **kwargs)
11.12. 00:23:48           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
11.12. 00:23:48     self._flush_unlocked()
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
11.12. 00:23:48     n = self.raw.write(bytes(self._write_buf))
11.12. 00:23:48         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
11.12. 00:23:48     return self._sock.send(b)
11.12. 00:23:48            ^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
11.12. 00:23:48     return self._sslobj.write(data)
11.12. 00:23:48            ^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)
11.12. 00:23:48 During handling of the above exception, another exception occurred:
11.12. 00:23:48 Traceback (most recent call last):
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/workers/threadpool.py", line 166, in _process_connections_until_interrupted
11.12. 00:23:48     keep_conn_open = conn.communicate()
11.12. 00:23:48                      ^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1310, in communicate
11.12. 00:23:48     self._conditional_error(req, '500 Internal Server Error')
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1353, in _conditional_error
11.12. 00:23:48     req.simple_response(response)
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/server.py", line 1119, in simple_response
11.12. 00:23:48     self.conn.wfile.write(EMPTY.join(buf))
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 68, in write
11.12. 00:23:48     res = super().write(val, *args, **kwargs)
11.12. 00:23:48           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 24, in write
11.12. 00:23:48     self._flush_unlocked()
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/site-packages/cheroot/makefile.py", line 33, in _flush_unlocked
11.12. 00:23:48     n = self.raw.write(bytes(self._write_buf))
11.12. 00:23:48         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/socket.py", line 725, in write
11.12. 00:23:48     return self._sock.send(b)
11.12. 00:23:48            ^^^^^^^^^^^^^^^^^^
11.12. 00:23:48   File "/sft_proc/prod/pbsp/python-linux/install/lib/python3.12/ssl.py", line 1180, in send
11.12. 00:23:48     return self._sslobj.write(data)
11.12. 00:23:48            ^^^^^^^^^^^^^^^^^^^^^^^^
11.12. 00:23:48 ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:2406)

[webknjaz]

(this is copied over from cherrypy/cherrypy#2050 (comment))

I wonder if tlsfuzzer can trigger these: #741.

Now I run exactly this version and I notice a similar occurence. Please have a look at those two logs and tell me, if this is alright, and if server threads were killed.

No, tracebacks aren't supposed to hit the logs unless something needs improving. I can't say if the worker threads died as a result from these limited pieces of logs, though.

It's been a while, so I had to rediscover what was implemented last year :)
Looking into commit 7b34907#diff-7e1452f6721288523eb718a38ef7ddf3cc98854f53606f0c02057b72dbd6c5d9R132, I see that I added code for printing out a message starting with A fatal exception happened. Setting the server interrupt flag.
Search your logs for this string to be sure. I seem to recall that this was the only code path I left for interrupting the program, so I'm like 99% positive that the threads remain alive if this hasn't happened.

Still, it'd be a good idea to get a stable reproducer and integrate it into the test suite.

P.S. Is @Wissperwind your second account?

[AzureIP]

Hi,

Thanks for your answer! Sorry for opening two issues. I was unsure wether to open it in cherrypy or cheroot. Now I know.
Yes, wissperwind is also my account.

It is good to hear that you think that the occured errors does not kill threads. I have searched for A fatal exception happened. Setting the server interrupt flag. It does not appear together with the logs I have posted. I have found one occurrence, but at a different point in time. I don't think it is related to this issue.

So decide for yourself if it is worth to keep this issue open and make some changed because of the stracktraces in my logs or not.

[webknjaz]

Oh, I'm definitely keeping this open. I seem to recall having some local experiments on my laptop, improving more corner cases that I never pushed. I'll need to find them and see if they handle this specific code path. If not, it's still worth deciding where to handle this best and produce better logging.