@Bhagabati Das If you are using CentOS 7, RHEL7, SLES 12 (Python 2.7) then in order to solve this problem simply configure the Ambari Agent to use TLSv1.2 when communicating with the Ambari Server by editing each Ambari Agent’s "/etc/ambari-agent/conf/ambari-agent.ini" file and adding the following configuration property to the security section: [security] force_https_protocol=PROTOCOL_TLSv1_2<br> Then restart the ambari agent: # ambari-agent restart For CentOS 6/RHEL6, or SLES 11 (Python 2.6), Edit the java.security file in the JDK being used by the Ambari Server and make the following changes: Locate the jdk.tls.disabledAlgorithms property and remove the 3DES_EDE_CBC reference Save the file, and restart the Ambari Server. More details are available on: HCC Article: https://community.hortonworks.com/articles/188269/javapython-updates-and-ambari-agent-tls-settings.html HCC Thread: https://community.hortonworks.com/questions/120861/ambari-agent-ssl-certificate-verify-failed-certifi.html ... View more