Upgrading to HDP 3.1 - failed at Create Principals

[#1]

Hi,

I am upgrading to to HDP 3.1, we have Ambari 2.7.3 and HDP 2.6.2 - Kerberos Enabled.

** Ambari Server is installed, but i dont have ambari-agent on that server, so it doesn't appear on the (api/v1/clusters/clustername/hosts?fields=Hosts/ip,Hosts/host_name)**

In step (Regenerate Missing Keytabs)

create principle its failing, giving an error (Host not found), i also checked the ambari-server log, and found the below exception :

Task #3611 failed to complete execution due to thrown exception: org.apache.ambari.server.HostNotFoundException:Host not found, hostname=myhost.mydomain.com

org.apache.ambari.server.HostNotFoundException: Host not found, hostname=myhost.mydomain.com

at org.apache.ambari.server.state.cluster.ClustersImpl.getHost(ClustersImpl.java:456)

at org.apache.ambari.server.state.ConfigHelper.getEffectiveDesiredTags(ConfigHelper.java:189)

at org.apache.ambari.server.state.ConfigHelper.getEffectiveDesiredTags(ConfigHelper.java:173)

at org.apache.ambari.server.controller.AmbariManagementControllerImpl.findConfigurationTagsWithOverrides(AmbariManagementControllerImpl.java:2371)

at sun.reflect.GeneratedMethodAccessor424.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.google.inject.internal.DelegatingInvocationHandler.invoke(DelegatingInvocationHandler.java:50)

at com.sun.proxy.$Proxy131.findConfigurationTagsWithOverrides(Unknown Source)

at org.apache.ambari.server.state.ConfigHelper.calculateExistingConfigurations(ConfigHelper.java:2158)

at org.apache.ambari.server.controller.KerberosHelperImpl.calculateConfigurations(KerberosHelperImpl.java:1725)

at org.apache.ambari.server.controller.KerberosHelperImpl.getActiveIdentities(KerberosHelperImpl.java:1800)

at org.apache.ambari.server.serveraction.kerberos.KerberosServerAction.calculateServiceIdentities(KerberosServerAction.java:511)

at org.apache.ambari.server.serveraction.kerberos.KerberosServerAction.processIdentities(KerberosServerAction.java:455)

at org.apache.ambari.server.serveraction.kerberos.CreatePrincipalsServerAction.execute(CreatePrincipalsServerAction.java:92)

at org.apache.ambari.server.serveraction.ServerActionExecutor$Worker.execute(ServerActionExecutor.java:550)

at org.apache.ambari.server.serveraction.ServerActionExecutor$Worker.run(ServerActionExecutor.java:466)

at java.lang.Thread.run(Thread.java:745)

i removed the short name from the /etc/hosts, also the DNS server its pointing to the correct IPS, so when i try nslookup from any of the data nodes, its able to resolve the ambari server host name, any suggestions please ?

[#2]

@Tarek Abouzeid

Please have a look at this document org.apache.ambari.server.HostNotFoundException: Host not found it will help you resolve your problem

Hope that helps

[#3]

@Tarek Abouzeid

Any updates?

[#4]

hi @Geoffrey Shelton Okot

thanks for your help, but in the document it mentioned that its not required that we have ambari agent running on ambari server machine, but actually its required , when we added the agent to the ambari server machine the error is gone, thanks again for help

[#5]

Hi @Tarek Abouzeid,

You where hitting : https://issues.apache.org/jira/browse/AMBARI-25088

the workaround was also mentioned in the Apache BUG,

This will be fixed in upcoming ambari versions 2.7.4 , as of now please install ambari-agent and register the host in ambari as a workaround.

If this Helps you please accept the best answer and close this thread.

[#6]

@Tarek Abouzeid

Can you run

# yum install ambari-agent

edit the ambari-agent.ini and ensure that the server points to the ambari server and retry