redis/redis-py · error · ConnectionError

no ocsp servers in certificate

Error message

no ocsp servers in certificate

What it means

Error "no ocsp servers in certificate" thrown in redis/redis-py.

Source

Thrown at redis/ocsp.py:239

            for i in aia
            if i.access_method == x509.oid.AuthorityInformationAccessOID.CA_ISSUERS
        ]
        try:
            issuer = issuers[0].access_location.value
        except IndexError:
            issuer = None

        # now, the series of ocsp server entries
        ocsps = [
            i
            for i in aia
            if i.access_method == x509.oid.AuthorityInformationAccessOID.OCSP
        ]

        try:
            ocsp = ocsps[0].access_location.value
        except IndexError:
            raise ConnectionError("no ocsp servers in certificate")

        return cert, issuer, ocsp

    def components_from_direct_connection(self):
        """Return the certificate, primary issuer, and primary ocsp server
        from the host defined by the socket. This is useful in cases where
        different certificates are occasionally presented.
        """

        pem = ssl.get_server_certificate((self.HOST, self.PORT), ca_certs=self.CA_CERTS)
        cert = x509.load_pem_x509_certificate(pem.encode(), backends.default_backend())
        return self._certificate_components(cert)

    def build_certificate_url(self, server, cert, issuer_cert):
        """Return the complete url to the ocsp"""
        orb = ocsp.OCSPRequestBuilder()

        # add_certificate returns an initialized OCSPRequestBuilder

View on GitHub (pinned to da03cdc7e8)

When it happens

Trigger: Thrown at redis/ocsp.py:239 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of redis/redis-py@da03cdc7e8 (2026-08-04). Data as JSON: /data/errors/3c0ad6cf903ee6c2.json. Report an issue: GitHub.