@saqie, a s this thread was marked 'Solved' in 2018, you would have a better chance of receiving a useful response by starting a new thread. This will also provide you with the opportunity to provide details specific to your issue that could aid others in providing a more tailored answer to your question.
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I have HDP3 High Availability enabled on the cluster. I have tested it and everything seems to be fine. Now, I have to add another namenode, which makes this setup from NN1, NN2 to NN1, NN2, NN3. If we look at the steps that are needed from Apache documentation as : https://hadoop.apache.org/docs/r3.0.3/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithNFS.html#Configuration_details or from: https://docs.cloudera.com/HDPDocuments/HDP3/HDP-3.1.0/fault-tolerance/content/configuring_the_namenode_ha_cluster.html https://docs.cloudera.com/HDPDocuments/HDP3/HDP-3.1.0/fault-tolerance/content/deploying_namenode_ha_cluster.html and particularly followed, Step 7 for new namenode I change configurations as dfs.ha.namenodes.mycluster -> nn1,nn2,nn3 dfs.namenode.http-address.mycluster.nn3 --> vmhdpmaster003:50070 dfs.namenode.https-address.mycluster. nn3 --> vmhdpmaster003:50470 dfs.namenode.rpc-address.mycluster.nn3 --> vmhdpmaster003:8020 dfs.namenode.shared.edits.dir qjournal://vmhdpmaster003:8485;vmhdpmaster001:8485;vmhdpmaster002:8485/ mycluster After applying the changes., I don't see nn3 added as another namenode. So then I tried, su -l hdfs -c "hdfs namenode -bootstrapStandby -force" I am getting an error like nn/vmhdpmaster003@REALM.com is able to get ticket, because there is no keytab file at /etc/security/keytabs. My cluster is configured with AD integration. Please help me how to create this missing keytab. Why ambari does not create a keytab itself? Is there a way to generate keytabs for service accounts via curl for ambari?
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