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Type: Bug
Resolution: Won't Do
Priority: Unknown
Fix Version/s: None
Affects Version/s: None
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Epic Link:
Async PyMongo GA Release
Quarter:
- FY26Q1
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Python Drivers

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test.asynchronous.test_encryption.TestKmsTLSOptions.test_06_named_kms_providers_apply_tls_options_gcp failed with an EAGAIN error which indicates we are improperly handling async pyopenssl connections:

 [2025/02/26 12:36:40.564] FAILURE: AssertionError: "HTTP status=404" does not match "KMS request failed after 3 retries due to a network error, last attempt failed with: 127.0.0.1:9002: (11, 'EAGAIN') (configured timeouts: socketTimeoutMS: 20000.0ms, connectTimeoutMS: 20000.0ms)" ()
 [2025/02/26 12:36:40.564] self = <pymongo.asynchronous.encryption._EncryptionIO object at 0x7fd146023da0>
 [2025/02/26 12:36:40.564] kms_context = <pymongocrypt.mongocrypt.MongoCryptKmsContext object at 0x7fd125d9d2a0>
 [2025/02/26 12:36:40.564]     async def kms_request(self, kms_context: MongoCryptKmsContext) -> None:
 [2025/02/26 12:36:40.564]         """Complete a KMS request.
 [2025/02/26 12:36:40.564]     
 [2025/02/26 12:36:40.564]         :param kms_context: A :class:`MongoCryptKmsContext`.
 [2025/02/26 12:36:40.564]     
 [2025/02/26 12:36:40.564]         :return: None
 [2025/02/26 12:36:40.564]         """
 [2025/02/26 12:36:40.564]         endpoint = kms_context.endpoint
 [2025/02/26 12:36:40.564]         message = kms_context.message
 [2025/02/26 12:36:40.564]         provider = kms_context.kms_provider
 [2025/02/26 12:36:40.564]         ctx = self.opts._kms_ssl_contexts.get(provider)
 [2025/02/26 12:36:40.564]         if ctx is None:
 [2025/02/26 12:36:40.564]             # Enable strict certificate verification, OCSP, match hostname, and
 [2025/02/26 12:36:40.564]             # SNI using the system default CA certificates.
 [2025/02/26 12:36:40.564]             ctx = get_ssl_context(
 [2025/02/26 12:36:40.564]                 None,  # certfile
 [2025/02/26 12:36:40.564]                 None,  # passphrase
 [2025/02/26 12:36:40.564]                 None,  # ca_certs
 [2025/02/26 12:36:40.564]                 None,  # crlfile
 [2025/02/26 12:36:40.564]                 False,  # allow_invalid_certificates
 [2025/02/26 12:36:40.564]                 False,  # allow_invalid_hostnames
 [2025/02/26 12:36:40.564]                 False,  # disable_ocsp_endpoint_check
 [2025/02/26 12:36:40.564]             )
 [2025/02/26 12:36:40.564]         # CSOT: set timeout for socket creation.
 [2025/02/26 12:36:40.564]         connect_timeout = max(_csot.clamp_remaining(_KMS_CONNECT_TIMEOUT), 0.001)
 [2025/02/26 12:36:40.564]         opts = PoolOptions(
 [2025/02/26 12:36:40.564]             connect_timeout=connect_timeout,
 [2025/02/26 12:36:40.564]             socket_timeout=connect_timeout,
 [2025/02/26 12:36:40.564]             ssl_context=ctx,
 [2025/02/26 12:36:40.564]         )
 [2025/02/26 12:36:40.564]         address = parse_host(endpoint, _HTTPS_PORT)
 [2025/02/26 12:36:40.564]         sleep_u = kms_context.usleep
 [2025/02/26 12:36:40.564]         if sleep_u:
 [2025/02/26 12:36:40.564]             sleep_sec = float(sleep_u) / 1e6
 [2025/02/26 12:36:40.564]             await asyncio.sleep(sleep_sec)
 [2025/02/26 12:36:40.564]         try:
 [2025/02/26 12:36:40.564]             conn = await _connect_kms(address, opts)
 [2025/02/26 12:36:40.564]             try:
 [2025/02/26 12:36:40.564]                 await async_sendall(conn, message)
 [2025/02/26 12:36:40.564]                 while kms_context.bytes_needed > 0:
 [2025/02/26 12:36:40.564]                     # CSOT: update timeout.
 [2025/02/26 12:36:40.564]                     conn.settimeout(max(_csot.clamp_remaining(_KMS_CONNECT_TIMEOUT), 0))
 [2025/02/26 12:36:40.564]                     if _IS_SYNC:
 [2025/02/26 12:36:40.564]                         data = conn.recv(kms_context.bytes_needed)
 [2025/02/26 12:36:40.564]                     else:
 [2025/02/26 12:36:40.564]                         from pymongo.network_layer import (  # type: ignore[attr-defined]
 [2025/02/26 12:36:40.564]                             async_receive_data_socket,
 [2025/02/26 12:36:40.564]                         )
 [2025/02/26 12:36:40.564]     
 [2025/02/26 12:36:40.564] >                       data = await async_receive_data_socket(conn, kms_context.bytes_needed)
 [2025/02/26 12:36:40.564] pymongo/asynchronous/encryption.py:210: 
 [2025/02/26 12:36:40.564] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
 [2025/02/26 12:36:40.564] pymongo/network_layer.py:303: in async_receive_data_socket
 [2025/02/26 12:36:40.564]     return await asyncio.wait_for(
 [2025/02/26 12:36:40.564] /opt/python/3.12/lib/python3.12/asyncio/tasks.py:520: in wait_for
 [2025/02/26 12:36:40.564]     return await fut
 [2025/02/26 12:36:40.564] pymongo/network_layer.py:146: in _async_receive_ssl
 [2025/02/26 12:36:40.564]     read = conn.recv_into(mv[total_read:])
 [2025/02/26 12:36:40.564] pymongo/pyopenssl_context.py:165: in recv_into
 [2025/02/26 12:36:40.564]     return self._call(super().recv_into, *args, **kwargs)
 [2025/02/26 12:36:40.564] pymongo/pyopenssl_context.py:126: in _call
 [2025/02/26 12:36:40.564]     return call(*args, **kwargs)
 [2025/02/26 12:36:40.564] .local/uv/cache/builds-v0/.tmp56qHKz/lib/python3.12/site-packages/OpenSSL/SSL.py:2268: in recv_into
 [2025/02/26 12:36:40.564]     self._raise_ssl_error(self._ssl, result)
 [2025/02/26 12:36:40.564] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
 [2025/02/26 12:36:40.564] self = <pymongo.pyopenssl_context._sslConn object at 0x7fd125d9c4a0>
 [2025/02/26 12:36:40.564] ssl = <cdata 'SSL *' 0x4bdda40>, result = -1
 [2025/02/26 12:36:40.564]     def _raise_ssl_error(self, ssl: Any, result: int) -> None:
 [2025/02/26 12:36:40.564]         if self._context._verify_helper is not None:
 [2025/02/26 12:36:40.564]             self._context._verify_helper.raise_if_problem()
 [2025/02/26 12:36:40.564]         if self._context._alpn_select_helper is not None:
 [2025/02/26 12:36:40.564]             self._context._alpn_select_helper.raise_if_problem()
 [2025/02/26 12:36:40.564]         if self._context._ocsp_helper is not None:
 [2025/02/26 12:36:40.564]             self._context._ocsp_helper.raise_if_problem()
 [2025/02/26 12:36:40.564]     
 [2025/02/26 12:36:40.564]         error = _lib.SSL_get_error(ssl, result)
 [2025/02/26 12:36:40.564]         if error == _lib.SSL_ERROR_WANT_READ:
 [2025/02/26 12:36:40.564]             raise WantReadError()
 [2025/02/26 12:36:40.564]         elif error == _lib.SSL_ERROR_WANT_WRITE:
 [2025/02/26 12:36:40.564]             raise WantWriteError()
 [2025/02/26 12:36:40.564]         elif error == _lib.SSL_ERROR_ZERO_RETURN:
 [2025/02/26 12:36:40.564]             raise ZeroReturnError()
 [2025/02/26 12:36:40.564]         elif error == _lib.SSL_ERROR_WANT_X509_LOOKUP:
 [2025/02/26 12:36:40.564]             # TODO: This is untested.
 [2025/02/26 12:36:40.564]             raise WantX509LookupError()
 [2025/02/26 12:36:40.564]         elif error == _lib.SSL_ERROR_SYSCALL:
 [2025/02/26 12:36:40.564]             if platform == "win32":
 [2025/02/26 12:36:40.564]                 errno = _ffi.getwinerror()[0]
 [2025/02/26 12:36:40.564]             else:
 [2025/02/26 12:36:40.564]                 errno = _ffi.errno
 [2025/02/26 12:36:40.564]             if _lib.ERR_peek_error() == 0 or errno != 0:
 [2025/02/26 12:36:40.564]                 if result < 0 and errno != 0:
 [2025/02/26 12:36:40.564] >                   raise SysCallError(errno, errorcode.get(errno))
 [2025/02/26 12:36:40.564] E                   OpenSSL.SSL.SysCallError: (11, 'EAGAIN')
 [2025/02/26 12:36:40.564] .local/uv/cache/builds-v0/.tmp56qHKz/lib/python3.12/site-packages/OpenSSL/SSL.py:1962: SysCallError
 [2025/02/26 12:36:40.564] The above exception was the direct cause of the following exception:
...

https://spruce.mongodb.com/task/mongo_python_driver_encryption_pyopenssl_rhel8_python3.12_test_8.0_standalone_noauth_nossl_sync_async_61feccacfefaf342ad673bf320b68d839bbdf66c_25_02_26_19_23_02/tests?execution=0&sortBy=STATUS&sortDir=ASC

We should retry the recv after EAGAIN similar to how we handle WantReadError and WantWriteError.

is duplicated by

PYTHON-5225 Test failure - asynchronous encryption TestKmsTLSOptions

Closed

is fixed by

PYTHON-5154 Remove PyOpenSSL support from Async PyMongo

Closed

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