@Masood  You could use the CDP REST API http://<cmhost>:<port>/api/v1/clusters/<cluster-name>/services/HDFS/roles/HDFS-NAMENODE-<namenode id> And look out for and search for "haStatus"  ... View more

@jlguti    Can you share the output of the below command?  Where to store container logs. An application's localized log directory will be found in ${yarn.nodemanager.log-dirs}/application_${appid}. Individual containers' log directories will be below this, in directories named container_{$contid}. Each container directory will contain the files stderr, stdin, and syslog generated by that container. yarn logs -applicationId application_1604418534431_0001 That could give us pointers to the potential issue either memory or some misconfiguration.   Happy Happoingg       ... View more

@ni4ni @Masood    Checkpointing is a process that takes an fsimage and edit log and compacts them into a new fsimage. This way, instead of replaying a potentially unbounded edit log, the NameNode can load the final in-memory state directly from the fsimage. This is a far more efficient operation and reduces NameNode startup time. Checkpointing is one of the most important activites of the standby or secondary Namenode in a cluster. In an HA cluster, all connections and cluster activity is managed by the Active namenode and the Standby NameNode takes the responsibility of compacting the edits logs and fsimage it does also performs checkpoints of the namespace state, and thus it is not necessary to run a Secondary NameNode   Hope that helps ... View more

@varun_rathinam    Is your nifi cluster kerberized if so you will need to provide the keytabs ... View more

@sgovi    Is there an entry in your local host's file? ... View more

@donno  I know how frustrating it is. I have just downloaded a fresh image of HDP 2.6.5  unpacked the image and performed the classic steps all all is looks fine I hope you a step that you might have missed.  Here we go. Sandbox settings, Memory, CPU, Network I enabled on Bridged Adapter as my laptop is connected to my LAN a class C network   Uncompressed the HDP  2.6.5 image and on successful extraction, I get the IP and URL with my local IP     My Local hosts file   Reset the root  default is root/hadoop and Ambari admin passwords this automatically starts the Ambari server After the successful start-up of Ambari I can now access the Ambari UI using my local LAN IP All service is up  and you can see the Ambari and HDP versions I have  demo'ed this 100's of time in here I hope you get successful and happy ending  Happy hadooping ... View more

@Amn_468    The NameNode is solely responsible for the Cluster Metadata so please increase the NN heap size and restart the services. Please revert    ... View more

@Amn_468  Increasing the Java Heap Size for the NameNode and Secondary NameNode Services,you could be using the default 1GB setting for heap size As a general rule of thumb take a look at the configuration of your Heap Sizes for every 1 Million Blocks in your cluster should have at least 1GB of Heap Size. 2 Million Blocks 2GB heap size 3 Million Blocks 3GB heap size ..... n Million Blocks n GB heap size After increasing the Java Heap Size and restart the HDFS Services that should resolve the issue.   Please revert ... View more

@sriram72  Can you share screenshots I just posted a response to a similar query? Please have a look at this Sandbox  issue    Hope that helps ... View more