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JobHistory server rolegroup cannot be added to HostTemplate

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I try to create a cluster via cloudera manager api in the following way:
1. create a cluster
2. add hosts to the cluster
3. create HDFS / YARN / ZOOKEEPER services using rolegroups
4. create HostTemplates for master and slave nodes.

My problem is that when I create the master HostTemplate there is no JobHistory role listed among YARN roles. Because of it after I assign the templates to the hosts, jobhistory server will be missing.

Can somebody tell me what's the reason of it, please? I use CDH 5.1.2 with cloudera manager.

My other problem is that if I add the JobHistory server manually via the admin console ui and start the cluster, the example mapreduce jobs cannot be executed. I think the reason is that the value of the yarn.nodemanager.aux-services is empty in yarn-site.xml but the appropriate cloudera manager property set to true (mapreduce_aux_service).

Can somebody explain me the reason of it?

Thanks and regards,


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