Ambari agent fails to register with server after upgrade to 2.7

[#1]

ambari-2-7.txt

[#2 · Accepted solution]

Relevant error; 'Operating System matching ubuntu16 could not be found'

Try this ; https://community.hortonworks.com/content/supportkb/182953/any-action-restartstopstart-cluster-after...

Solution: To resolve this issue, correct the OS type and repository from Ambari UI > Admin > Manage Ambari  > Versions > Repositories.