New OS releases can be tested and certified only with new Cloudera Manager / CDH versions. With the recent 5.13 release, RedHat / CentOS 7.4 is now supported for the 5.11, 5.12 and 5.13 releases, see CDH and Cloudera Manager Supported Operating Systems ... View more

Installed Cloudera Manager packages were for RHEL6. Uninstall cloudera-manager-agent and cloudera-manager-daemons. Adjust yum repository in /etc/yum.repos.d/cloudera-manager.repo to EL7 Install CM agent packages, now with the correct OS version. ... View more

Hi atai,   your first CM API call will download the mapred-site.xml configuration file that this specific role instance was started with (in your case Resource Manager). See that the mapred-site.xml config file in/var/run/cloudera-scm-agent/process/xxx-yarn-RESOURCEMANAGER/mapred-site.xml has the same values.   This mapred-site.xml file contains only the configuration values that are relevant to the Resource Manager role.   You want to download the client configuration files for the YARN service instead, using the UI or a call like # curl -o yarn-clientconfig.zip -u admin:admin http://cmhost:7180/api/v12/clusters/Cluster%201/services/YARN-1/clientConfig   ... View more

This is planned for the next release 5.9 currently. This may be subject to change, though. ... View more

Hi Nolian,   I'm wondering about your /etc/hosts, are those IP addresses and hostnames really each on a new line, or is the formatting just broken due to copy/pasting to here?   Please run these commands on all nodes to determine the status # hostname # hostname -f # python -c 'import socket; print socket.getfqdn(), socket.gethostbyname(socket.getfqdn())'  # getent hosts <give the FQDN>   ... View more