Alright....all good now...the problem was with AD....in our Environment..KDC is AD..in AD there are 2 field names "User logon name" and "user logon name(pre windows 2000)" . Usually the value of these attributes are same..In this case, all the user names were generated automatically when we kerberize the cluster..for these user names "user logon name" and "user logon name(pre windows 2000)" were different. The "user logon name(pre windows 2000" was an 20 character alphanumeric. IN kerberized cluster, the service accounts has to impersonate all Hadoop service accounts like "nn', "dn","rm". So we edited all the service accounts in AD i,e "user logon name(pre windows 2000)" were made to be same as "User logon name" . IN HDFS config...there is a property "Auth_to_Local mappings". We added rules to convert the pattern(service account name in AD) to local service users (hdfs, nn, hive, dn ..etc etc) ... View more

Hi @Kumar Veerappan, I guess you are referring to this blog for Customizing the Ambari Alert : https://cwiki.apache.org/confluence/display/AMBARI/Customizing+the+Alert+Template then you can change the alert to Your desired one with help of editing the <subject></subject> in alert-templates.xml : https://github.com/apache/ambari/blob/trunk/ambari-server/src/main/resources/alert-templates.xml#L21 Just for example, I have some changes on subject for my Business logic : <subject> <![CDATA[ #set( $criticalServices = $summary.getServicesByAlertState("CRITICAL")) #if( $summary.getCriticalCount() ==0) There is no new critical Alert! #{else} We have $summary.getCriticalCount() Critical Alert(s).Alert Details : ,#foreach( $service in $criticalServices ) #foreach( $alert in $summary.getAlerts($service,"CRITICAL") ) Service Name : $alert.getServiceName(),Host Name : $alert.getHostName() #end #end #end ]]> </subject> Which is doing nothing but Listing critical alert count in the Email subject. See if you can Makeuse of some thing out of it. Please give a Accept answer if it did. ... View more