@huzaira bashir There seems to be a mismatch between the Active Directory encryption type and the MIT encryption types can you align the 2 supported_enctypes to be the same. Windows supports the below encryption types depending on the Windows version which are weak encryption DES_CBC_CRC DES_CBC_MD5 RC4_HMAC_MD5 AES128_HMAC_SHA1 AES256_HMAC_SHA1 In your kdc.conf you have stronger encryption types you validate the AD encryption types? Else try to comment out the kdc.conf encryptions see below # supported_enctypes = aes256-cts:normal aes128-cts:normal des3-hmac-sha1:normal arcfour-hmac:normal camellia256-cts:normal camellia128-cts:normal des-hmac-sha1:normal des-cbc-md5:normal des-cbc-crc:normal and see whether the error persists? ... View more

@Ahra Ko There is a step you missed, you should run the below,please adjust the HDF version to match ambari-server install-mpack --mpack=/tmp/hdf-ambari-mpack-3.3.0.0-165.tar.gz --purge --verbose After the restart of Ambari the Nifi service should be available HTH ... View more

@Adam J Nifi is not capable of spinning up a new node if one goes down,autoscaling is possible in AWS . AWS Auto Scaling monitors your applications and automatically adjusts capacity to maintain a steady, predictable predefined number of a node if a specifically configured alert is triggered eg Bad health or lost heartbeat. Kubernetes is another tool that you can use for auto-scaling best if your nifi is containerized HTH ... View more