@Kuldeep Kulkarni you can use command line tools like pdsh or some configuration management tool like ansible and tail /var/log/messages for installed RPMs, alternatively, you can run command ps aux | grep yum and see what's being installed as well. ... View more

Ambari has been around at least 3 years less than CM, in that time, it gained a massive following from many different companies and contributors. CM is essentially a proprietary product limiting itself in innovation from community. It is known to have more features but Ambari is gaining in this area benefiting from the same reason I'd mentioned above. Hortonworks, IBM, Pivotal, Infosys, etc all use Ambari as their main Hadoop configuration interface and it benefits everyone that it works well. Ambari also has a feature called Ambari views, you can create your owns views, add custom services, feature that CM I believe does not have. One missing piece is Oozie workflow editor but with such a large community and many contributors, I am hoping we close the gap very soon! @jarhyeon cho ... View more

@Hefei Li it has nothing to do with the proxyuser as you'd realized from your exercise, check the permissions in Oozie for the user you're executing the workflow with. ... View more

@Bidyut B you can file a jira with your enancement suggestions. ... View more

Client, ApplicationMaster and NodeManager on RM failover When there are multiple RMs, the configuration (yarn-site.xml) used by clients and nodes is expected to list all the RMs. Clients, ApplicationMasters (AMs) and NodeManagers (NMs) try connecting to the RMs in a round-robin fashion until they hit the Active RM. If the Active goes down, they resume the round-robin polling until they hit the “new” Active. This default retry logic is implemented as org.apache.hadoop.yarn.client.ConfiguredRMFailoverProxyProvider. You can override the logic by implementing org.apache.hadoop.yarn.client.RMFailoverProxyProvider and setting the value of yarn.client.failover-proxy-provider to the class name. here's more info. @Benjamin Leonhardi ... View more

@wei jiang see if you have multiple python versions loaded, do you have any old ambari files? Run "rpm -qa | grep ambari". See if you have any ambari files in /usr/lib/python2.6/site-packages you may need to remove them first. Please paste the whole error in /var/log/ambari-server/ ... View more