Warnung Überprüfe Gültigkeit der SSL Zertifikate

Hallo zusammen,

auf einem Replica Dir Node (srv03) sehe ich seit einiger Zeit die o.g. Warnung. Kann mir jemand helfen, das zu beseitigen?

srv01 ist der primary node, auf dem alles grün ist.

Vielen Dank im Voraus!
KaBi

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 453, in wrap_socket
    cnx.do_handshake()
  File "/usr/lib/python3/dist-packages/OpenSSL/SSL.py", line 1915, in do_handshake
    self._raise_ssl_error(self._ssl, result)
  File "/usr/lib/python3/dist-packages/OpenSSL/SSL.py", line 1647, in _raise_ssl_error
    _raise_current_error()
  File "/usr/lib/python3/dist-packages/OpenSSL/_util.py", line 54, in exception_from_error_queue
    raise exception_type(errors)
OpenSSL.SSL.Error: [('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 601, in urlopen
    chunked=chunked)
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 344, in _make_request
    self._validate_conn(conn)
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 846, in _validate_conn
    conn.connect()
  File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 358, in connect
    ssl_context=context)
  File "/usr/lib/python3/dist-packages/urllib3/util/ssl_.py", line 347, in ssl_wrap_socket
    return context.wrap_socket(sock, server_hostname=server_hostname)
  File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 459, in wrap_socket
    raise ssl.SSLError('bad handshake: %r' % e)
ssl.SSLError: ("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')])",)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/requests/adapters.py", line 449, in send
    timeout=timeout
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 639, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 399, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='srv01.intern.kundendomain.de', port=443): Max retries exceeded with url: /ucs-root-ca.crt (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')])")))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/__init__.py", line 277, in execute
    ret = execute(umc_module, **kwargs)
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/plugins/02_certificate_check.py", line 287, in run
    cert_verify = list(verify_from_master(configRegistry.get('ldap/master'), all_certificates))
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/plugins/02_certificate_check.py", line 269, in verify_from_master
    with download_tempfile(root_ca_uri) as root_ca, download_tempfile(crl_uri) as crl:
  File "/usr/lib/python3.7/contextlib.py", line 112, in __enter__
    return next(self.gen)
  File "/usr/lib/python3/dist-packages/univention/management/console/modules/diagnostic/plugins/02_certificate_check.py", line 242, in download_tempfile
    response = requests.get(url, stream=True)
  File "/usr/lib/python3/dist-packages/requests/api.py", line 75, in get
    return request('get', url, params=params, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/api.py", line 60, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 535, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 670, in send
    history = [resp for resp in gen] if allow_redirects else []
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 670, in 
    history = [resp for resp in gen] if allow_redirects else []
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 247, in resolve_redirects
    **adapter_kwargs
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 648, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/adapters.py", line 514, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='srv01.intern.kundendomain.de', port=443): Max retries exceeded with url: /ucs-root-ca.crt (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')])")))
Univention Support Database - Erneuern der TLS/SSL-Zertifikate
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