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aws lambda - The library libcrypto could not be found

Recently my lambda code stopped working. I am no longer able to create connection to Snowflake with sqlalchemy. See error stack below.

The library libcrypto could not be found: LibraryNotFoundError
Traceback (most recent call last):
  (...)
  File "/var/task/sqlalchemy/engine/base.py", line 2263, in connect
    return self._connection_cls(self, **kwargs)
  File "/var/task/sqlalchemy/engine/base.py", line 104, in __init__
    else engine.raw_connection()
  File "/var/task/sqlalchemy/engine/base.py", line 2370, in raw_connection
    self.pool.unique_connection, _connection
  File "/var/task/sqlalchemy/engine/base.py", line 2336, in _wrap_pool_connect
    return fn()
  File "/var/task/sqlalchemy/pool/base.py", line 304, in unique_connection
    return _ConnectionFairy._checkout(self)
  File "/var/task/sqlalchemy/pool/base.py", line 778, in _checkout
    fairy = _ConnectionRecord.checkout(pool)
  File "/var/task/sqlalchemy/pool/base.py", line 495, in checkout
    rec = pool._do_get()
  File "/var/task/sqlalchemy/pool/impl.py", line 140, in _do_get
    self._dec_overflow()
  File "/var/task/sqlalchemy/util/langhelpers.py", line 70, in __exit__
    with_traceback=exc_tb,
  File "/var/task/sqlalchemy/util/compat.py", line 182, in raise_
    raise exception
  File "/var/task/sqlalchemy/pool/impl.py", line 137, in _do_get
    return self._create_connection()
  File "/var/task/sqlalchemy/pool/base.py", line 309, in _create_connection
    return _ConnectionRecord(self)
  File "/var/task/sqlalchemy/pool/base.py", line 440, in __init__
    self.__connect(first_connect_check=True)
  File "/var/task/sqlalchemy/pool/base.py", line 661, in __connect
    pool.logger.debug("Error on connect(): %s", e)
  File "/var/task/sqlalchemy/util/langhelpers.py", line 70, in __exit__
    with_traceback=exc_tb,
  File "/var/task/sqlalchemy/util/compat.py", line 182, in raise_
    raise exception
  File "/var/task/sqlalchemy/pool/base.py", line 656, in __connect
    connection = pool._invoke_creator(self)
  File "/var/task/sqlalchemy/engine/strategies.py", line 114, in connect
    return dialect.connect(*cargs, **cparams)
  File "/var/task/sqlalchemy/engine/default.py", line 509, in connect
    return self.dbapi.connect(*cargs, **cparams)
  File "/var/task/snowflake/connector/__init__.py", line 52, in Connect
    return SnowflakeConnection(**kwargs)
  File "/var/task/snowflake/connector/connection.py", line 227, in __init__
    self.connect(**kwargs)
  File "/var/task/snowflake/connector/connection.py", line 423, in connect
    self.__open_connection()
  File "/var/task/snowflake/connector/connection.py", line 633, in __open_connection
    self._authenticate(auth_instance)
  File "/var/task/snowflake/connector/connection.py", line 866, in _authenticate
    self.__authenticate(self.__preprocess_auth_instance(auth_instance))
  File "/var/task/snowflake/connector/connection.py", line 896, in __authenticate
    session_parameters=self._session_parameters,
  File "/var/task/snowflake/connector/auth.py", line 200, in authenticate
    socket_timeout=self._rest._connection.login_timeout)
  File "/var/task/snowflake/connector/network.py", line 518, in _post_request
    _include_retry_params=_include_retry_params)
  File "/var/task/snowflake/connector/network.py", line 595, in fetch
    **kwargs)
  File "/var/task/snowflake/connector/network.py", line 702, in _request_exec_wrapper
    raise e
  File "/var/task/snowflake/connector/network.py", line 633, in _request_exec_wrapper
    **kwargs)
  File "/var/task/snowflake/connector/network.py", line 891, in _request_exec
    raise err
  File "/var/task/snowflake/connector/network.py", line 787, in _request_exec
    auth=SnowflakeAuth(token),
  File "/var/task/requests/sessions.py", line 530, in request
    resp = self.send(prep, **send_kwargs)
  File "/var/task/requests/sessions.py", line 643, in send
    r = adapter.send(request, **kwargs)
  File "/var/task/requests/adapters.py", line 449, in send
    timeout=timeout
  File "/var/task/urllib3/connectionpool.py", line 677, in urlopen
    chunked=chunked,
  File "/var/task/urllib3/connectionpool.py", line 381, in _make_request
    self._validate_conn(conn)
  File "/var/task/urllib3/connectionpool.py", line 978, in _validate_conn
    conn.connect()
  File "/var/task/urllib3/connection.py", line 371, in connect
    ssl_context=context,
  File "/var/task/snowflake/connector/ssl_wrap_socket.py", line 74, in ssl_wrap_socket_with_ocsp
    from .ocsp_asn1crypto import SnowflakeOCSPAsn1Crypto as SFOCSP
  File "/var/task/snowflake/connector/ocsp_asn1crypto.py", line 48, in <module>
    from oscrypto import asymmetric
  File "/var/task/oscrypto/asymmetric.py", line 19, in <module>
    from ._asymmetric import _unwrap_private_key_info
  File "/var/task/oscrypto/_asymmetric.py", line 27, in <module>
    from .kdf import pbkdf1, pbkdf2, pkcs12_kdf
  File "/var/task/oscrypto/kdf.py", line 9, in <module>
    from .util import rand_bytes
  File "/var/task/oscrypto/util.py", line 14, in <module>
    from ._openssl.util import rand_bytes
  File "/var/task/oscrypto/_openssl/util.py", line 6, in <module>
    from ._libcrypto import libcrypto, libcrypto_version_info, handle_openssl_error
  File "/var/task/oscrypto/_openssl/_libcrypto.py", line 9, in <module>
    from ._libcrypto_cffi import (
  File "/var/task/oscrypto/_openssl/_libcrypto_cffi.py", line 27, in <module>
    raise LibraryNotFoundError('The library libcrypto could not be found')
oscrypto.errors.LibraryNotFoundError: The library libcrypto could not be found

The library libcrypto could not be found: LibraryNotFoundError Traceback (most recent call last): File "/var/task/index.py", line 43, in lambda_handler main(event['survey_id'], event['k_anon_lvl'], sf_config_imm_deployer, immuta_config, sf_config_immuta) File "/var/task/immuta_bruteforce_table.py", line 442, in main p = Project(immuta_config, sf_config, project_name, delete_existing=True) File "/var/task/immuta_bruteforce_table.py", line 212, in __init__ self.delete_schema() File "/var/task/immuta_bruteforce_table.py", line 253, in delete_schema self.sf_config.connect() File "/var/task/immuta_bruteforce_table.py", line 109, in connect self.connection = self.engine.connect() File "/var/task/sqlalchemy/engine/base.py", line 2263, in connect return self._connection_cls(self, **kwargs) File "/var/task/sqlalchemy/engine/base.py", line 104, in __init__ else engine.raw_connection() File "/var/task/sqlalchemy/engine/base.py", line 2370, in raw_connection self.pool.unique_connection, _connection File "/var/task/sqlalchemy/engine/base.py", line 2336, in _wrap_pool_connect return fn() File "/var/task/sqlalchemy/pool/base.py", line 304, in unique_connection return _ConnectionFairy._checkout(self) File "/var/task/sqlalchemy/pool/base.py", line 778, in _checkout fairy = _ConnectionRecord.checkout(pool) File "/var/task/sqlalchemy/pool/base.py", line 495, in checkout rec = pool._do_get() File "/var/task/sqlalchemy/pool/impl.py", line 140, in _do_get self._dec_overflow() File "/var/task/sqlalchemy/util/langhelpers.py", line 70, in __exit__ with_traceback=exc_tb, File "/var/task/sqlalchemy/util/compat.py", line 182, in raise_ raise exception File "/var/task/sqlalchemy/pool/impl.py", line 137, in _do_get return self._create_connection() File "/var/task/sqlalchemy/pool/base.py", line 309, in _create_connection return _ConnectionRecord(self) File "/var/task/sqlalchemy/pool/base.py", line 440, in __init__ self.__connect(first_connect_check=True) File "/var/task/sqlalchemy/pool/base.py", line 661, in __connect pool.logger.debug("Error on connect(): %s", e) File "/var/task/sqlalchemy/util/langhelpers.py", line 70, in __exit__ with_traceback=exc_tb, File "/var/task/sqlalchemy/util/compat.py", line 182, in raise_ raise exception File "/var/task/sqlalchemy/pool/base.py", line 656, in __connect connection = pool._invoke_creator(self) File "/var/task/sqlalchemy/engine/strategies.py", line 114, in connect return dialect.connect(*cargs, **cparams) File "/var/task/sqlalchemy/engine/default.py", line 509, in connect return self.dbapi.connect(*cargs, **cparams) File "/var/task/snowflake/connector/__init__.py", line 52, in Connect return SnowflakeConnection(**kwargs) File "/var/task/snowflake/connector/connection.py", line 227, in __init__ self.connect(**kwargs) File "/var/task/snowflake/connector/connection.py", line 423, in connect self.__open_connection() File "/var/task/snowflake/connector/connection.py", line 633, in __open_connection self._authenticate(auth_instance) File "/var/task/snowflake/connector/connection.py", line 866, in _authenticate self.__authenticate(self.__preprocess_auth_instance(auth_instance)) File "/var/task/snowflake/connector/connection.py", line 896, in __authenticate session_parameters=self._session_parameters, File "/var/task/snowflake/connector/auth.py", line 200, in authenticate socket_timeout=self._rest._connection.login_timeout) File "/var/task/snowflake/connector/network.py", line 518, in _post_request _include_retry_params=_include_retry_params) File "/var/task/snowflake/connector/network.py", line 595, in fetch **kwargs) File "/var/task/snowflake/connector/network.py", line 702, in _request_exec_wrapper raise e File "/var/task/snowflake/connector/network.py", line 633, in _request_exec_wrapper **kwargs) File "/var/task/snowflake/connector/network.py", line 891, in _request_exec raise err File "/var/task/snowflake/connector/network.py", line 787, in _request_exec auth=SnowflakeAuth(token), File "/var/task/requests/sessions.py", line 530, in request resp = self.send(prep, **send_kwargs) File "/var/task/requests/sessions.py", line 643, in send r = adapter.send(request, **kwargs) File "/var/task/requests/adapters.py", line 449, in send timeout=timeout File "/var/task/urllib3/connectionpool.py", line 677, in urlopen chunked=chunked, File "/var/task/urllib3/connectionpool.py", line 381, in _make_request self._validate_conn(conn) File "/var/task/urllib3/connectionpool.py", line 978, in _validate_conn conn.connect() File "/var/task/urllib3/connection.py", line 371, in connect ssl_context=context, File "/var/task/snowflake/connector/ssl_wrap_socket.py", line 74, in ssl_wrap_socket_with_ocsp from .ocsp_asn1crypto import SnowflakeOCSPAsn1Crypto as SFOCSP File "/var/task/snowflake/connector/ocsp_asn1crypto.py", line 48, in <module> from oscrypto import asymmetric File "/var/task/oscrypto/asymmetric.py", line 19, in <module> from ._asymmetric import _unwrap_private_key_info File "/var/task/oscrypto/_asymmetric.py", line 27, in <module> from .kdf import pbkdf1, pbkdf2, pkcs12_kdf File "/var/task/oscrypto/kdf.py", line 9, in <module> from .util import rand_bytes File "/var/task/oscrypto/util.py", line 14, in <module> from ._openssl.util 

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1 Answer

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by (71.8m points)

For completeness, moving the answer from @Clement in a comment to an answer:

This error can happen when loading the oscrypto (libcrypto) if the memory usage is too high. The OOM state cascades upward.


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