I just tried this and had no issues. Ambari 2.4.2/HDP 2.4 curl command worked fine Express upgrade to HDP 2.5 (Ambari 2.4.2/HDP 2.5) curl command worked fine Check your ambari.log file to see if there are any interesting errors. ... View more

Using KEYRING was a state of art at the moment Kerberos was bundled for RHEL7. However moving forward into the world of containers using KEYRING becomes a challenge thus SSSD is building internal ticket cache that will be supported by the system Kerberos libraries. So in general the recommendation nowadays is to use native OS Kerberos libraries, they are most recent and will provide latest functionality and experience. ... View more