Ambari-Agent install (v 2.2.2.0), connection on port 8440 refused

[#1]

I am really puzzled by the following problem:

INFO 2016-07-07 15:35:05,001 NetUtil.py:60 - Connecting to https://master2.localhost:8440/ca
WARNING 2016-07-07 15:35:05,839 NetUtil.py:89 - Failed to connect to https://master2.localhost:8440/ca due to [Errno 113] No route to host  
WARNING 2016-07-07 15:35:05,840 NetUtil.py:112 - Server at https://master2.localhost:8440 is not reachable, sleeping for 10 seconds...
', None)

Connection to master1.localhost closed.
SSH command execution finished
host=master1.localhost, exitcode=0

Command end time 2016-07-07 15:35:07

Registering with the server...
Registration with the server failed.

Does anybody know what is happening? I cannot see any issue with the Java version I am using...

[#2 · Accepted solution]

Ok, I think I found the answer 🙂 I already installed the agents before I did the installation. This gave the error, as the agents where obviously using the ports that were required...

[#3]

Log says : "https://master2.localhost:8440 is not reachable"

Is this host name "master2.localhost" resolvable from both the nodes ?

Is the entry "master2.localhost" available in the agent /etc/hosts file and also in the master2 has the "hostname -f" command out put as "master2.localhost" ?