Hi all,   I'm not sure if this issue is considered solved. In case it helps, I explain how we did it.   We found the same error after removing several nodes of our kerberized cluster (Ambari 2.7.4 and HDP 3.1.4).   $ /usr/hdp/current/hadoop-yarn-client/bin/yarn app -status ats-hbase 20/11/02 07:04:39 INFO client.AHSProxy: Connecting to Application History server at XXXXX/YYY.YYY.YY.YY:10200 20/11/02 07:04:39 INFO client.AHSProxy: Connecting to Application History server at XXXXX/YYY.YYY.YY.YY:10200 ats-hbase Failed : HTTP error code : 500 Following this thread, we checked carefully the YARN configuration to ensure that all the variables were correctly scaled to the available nodes.   After that, we destroyed the yarn app:   $ yarn app -destroy ats-hbase 20/11/02 07:06:13 INFO client.AHSProxy: Connecting to Application History server at XXXXX/YYY.YYY.YY.YY:10200 20/11/02 07:06:13 INFO client.AHSProxy: Connecting to Application History server at XXXXX/YYY.YYY.YY.YY:10200 20/11/02 07:06:14 INFO client.ApiServiceClient: Successfully destroyed service ats-hbase $ /usr/hdp/current/hadoop-yarn-client/bin/yarn app -status ats-hbase 20/11/02 07:06:19 INFO client.AHSProxy: Connecting to Application History server at XXXXX/YYY.YYY.YY.YY:10200 20/11/02 07:06:19 INFO client.AHSProxy: Connecting to Application History server at XXXXX/YYY.YYY.YY.YY:10200 Service ats-hbase not found   Thus, we restarted all the YARN service on ambari. Now, everything is running fine.    $ /usr/hdp/current/hadoop-yarn-client/bin/yarn app -status ats-hbase 20/11/02 07:09:02 INFO client.AHSProxy: Connecting to Application History server at XXXXX/YYY.YYY.YY.YY:10200 20/11/02 07:09:02 INFO client.AHSProxy: Connecting to Application History server at XXXXX/YYY.YYY.YY.YY:10200 {"name":"ats-hbase","id":"application_1604297264331_0001","artifact":{"id":"/hdp/apps/3.1.4.0-315/hbase/rm2/hbase.tar.gz","type":"TARBALL"},"lifetime":-1,"components":[{"name":"master","dependencies":[],"artifact":{"id":"/hdp/apps/3.1.4.0-315/hbase/rm2/hbase.tar.gz","type":"TARBALL"},"resource":{"cpus":1,"memory":"4096","additional":{}},"state":"STABLE","configuration":{"properties":{"yarn.service.container-failure.retry.max":"10","yarn.service.framework.path":"/hdp/apps/3.1.4.0-315/yarn/rm2/service-dep.tar.gz"},"env":{"HBASE_LOG_PREFIX":"hbase-$HBASE_IDENT_STRING-master-$HOSTNAME","HBASE_LOGFILE":"$HBASE_LOG_PREFIX.log","HBASE_MASTER_OPTS":"-Xms3276m -Xmx3276m -Djava.security.auth.login.config=/usr/hdp/3.1.4.0-315/hadoop/conf/embedded-yarn-ats-hbase/yarn_hbase_master_jaas.conf", [...]   ... View more

Should we also delete Kafka topics before deleting the service? Will the topics still remain after deleting the service? ... View more

Following KB can be used to delete users/groups in bulk   https://community.cloudera.com/t5/Community-Articles/Remove-AD-LDAP-accounts-from-Ambari-using-REST-API/tac-p/244196   ... View more

the password would be 'hadoop' ... View more

Hi @jsensharma , Is there any rest API call available for this recovery host option. That will be very helpful.   Thanks, Bhuban ... View more

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Thanks a tonn!!!! I was struggling with the same issue , it helped , Thanks  ... View more

@Bender ,   Thank you. This helped is resolving the error. ... View more

YES! This solved my problem, it seems to be a bug in hiveserver mentioned in Apache bug reports.   hive.metastore.event.db.notification.api.auth=false ... View more

Thank you very much for this!!!!, It solves the problem registering host using ambari 2.7.3 and hdp 3.1.4 awesome! ... View more