@Rajinder Kaur Yes, it's valid link. Here you get all the Hortonworks tutorials http://hortonworks.com/tutorials/ ... View more

@Rajinder Kaur If you are using Ambari, then you can modify the properties from Ambari and restart affected services. If performing the changes manually, check the owner of the file and modify the file as owner of the file. Regarding configurations, refer to below post with similar issue: https://community.hortonworks.com/questions/5780/hive-on-tez-query-map-output-outofmemoryerror-java.html Hope this helps. Thanks and Regards, Sindhu ... View more