Hello, good morning.
I have a problem with the HDF, one of the hosts was rebooted this weekend and after the reboot, Ambari can not connect to it as it does not get a heartbeat.
Please, someone can tell me what steps I can take to solve it.
Please check the "/var/log/ambari-agent/ambari-agent.log" file. Also please share the log after restarting it.
We will also need to know if by any chance you have upgraded the Python recently on the problematic host?
# python --version # grep 'python' /var/log/yum.log
Can you also check and let us know if the FQDN of this host got changed recently? Please share the outputs of the following commands from the agent host.
# hostname -f # cat /etc/hosts # grep 'hostname' /etc/ambari-agent/conf/ambari-agent.ini
Hi Jay, i check the log: var/log/ambari-agent/ambari-agent.log
After seeing an authentication error. By performing a tls force everything went back to working properly.
In the section [Security] add "force_https_protocol=PROTOCOL_TLSv1_2"
Just for a reference of other HCC users i am adding the HCC Article link which explains the usage of the mentioned flag:
To solve the SSL auth error problem simply configure the Ambari Agent to use TLSv1.2 when communicating with the Ambari Server by editing each Ambari Agent’s /etc/ambari-agent/conf/ambari-agent.ini file and adding the following configuration property to the security section: