Hi @Magudeswaran Ambari server uses appropriate database base connector which is located under /user/share/java/*<databasename>.jar This same connector jar is used to connect to any external or internal database. It needs to be mentioned using ambari-server --jdbc * command. Refer documentation for exact command. Issue could be due to the connector jar that is configured for ambari to use. For eg. Ambari is configured to use postgres but you are trying to connect to Mariadb and since it doesn't has the proper jar configured, it won't connect and you will face issue. Let me know if this resolves your issue. Else please share the screen shot and error logs to check further.
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