Currently, CDH 5.10.2-1.cdh5.10.2.p0.5 is activated on my cluster, however I am unable to upgrade to higher version as no new upgrades are available when i checked for new parcels. Is the lastest CDH version is not released for CentOS Linux release 7.3.1611.
I am not sure if this will be available later or I need to upgrade it manually.
That version should be available for RHEL7: https://www.cloudera.com/documentation/enterprise/release-notes/topics/rn_consolidated_pcm.html#conc...
It's probably worth asking in the CM forum http://community.cloudera.com/t5/Cloudera-Manager-Installation/bd-p/CMInstall since it seems to be part of the upgrade flow.
Just checked your CDH version and CM 5.12.1 on Centos 7 and I was able to download the 5.12.1 parcels with no problem. Can you check if your configuration for parcels is correctly pointing to the archive.cloudera.com address?