Hello, I have actually formatted the question with sufficient information here:
https://stackoverflow.com/questions/45512063/console-producer-error-after-implementing-with-tls-ssl In Summary, I have tried to debug this and it looks like the certificates are being printed and recognised as "Trusted" - but it's always returning the following error: [2017-08-07 12:50:08,210] WARN Error while fetching metadata with correlation id 40 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient) When I start the console producer and type the message "try this message" the following is the opening message I can see: trigger seeding of SecureRandom done seeding SecureRandom >try this message Using SSLEngineImpl. Allow unsafe renegotiation: false Allow legacy hello messages: true Is initial handshake: true Is secure renegotiation: false Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1 Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.1 Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1.1 %% No cached client session *** ClientHello, TLSv1.2 RandomCookie: GMT: 1485329221 bytes = { 122, 192, 49, 227, 176, 81, 216, 252, 36, 253, 72, 128, 148, 185, 231, 95, 193, 7, 78, 37, 11, 154, 43, 98, 123, 251, 240, 80 } Session ID: {} Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV] Compression Methods: { 0 } Extension elliptic_curves, curve names: {secp256r1, secp384r1, secp521r1, sect283k1, sect283r1, sect409k1, sect409r1, sect571k1, sect571r1, secp256k1} Extension ec_point_formats, formats: [uncompressed] Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA256withDSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA *** After that, there are lots of certificates which has positive messages like "Found trusted certificate" etc. I am slightly clueless as to which steps to take next. I have already tried enabling logging for security (because what I've just provided above) - but struggling to make sense out of this. My certificate setup process actually matches Mr. Juma's test setup mentioned in: https://www.confluent.io/blog/apache-kafka-security-authorization-authentication-encryption/ Would someone be kind and point me to the right direction? Kindest Regards,
