问题
I am installing cloudera manager on local machine. When trying to add new host getting following error
Installation failed. Failed to receive heartbeat from agent.
Ensure that the host's hostname is configured properly.
Ensure that port 7182 is accessible on the Cloudera Manager server (check firewall rules).
Ensure that ports 9000 and 9001 are free on the host being added.
Check agent logs in /var/log/cloudera-scm-agent/ on the host being added (some of the logs can be found in the installation details).
i checked the logs,it shows like hostname differs from canonical name
So I also changed the hostname from /etc/resolv.conf But still getting sam error
回答1:
I had the same error for a simple mistake in the file /etc/hosts : Have you checked you have DNS and reverse DNS ?
Then to check if your port is open 7182, you should do a telnet IP 7182 (replace IP by the host of Cloudera Manager Server).
If there are still some problems, maybe you have forgotten to deactivate the firewall (iptables).
Regards, K.
回答2:
To resolve this issue you need to check first all port opened on your server service listing to the port no, use command: sudo netstat -lpten
Check if any thing is running on 9000 or 90001, mostly java services required for set up is running on port 9000, and cloudera-scm-agent listner also runs on port 9000. to over come this issue you can re-configure theports as well in /etc/cloudera-scm-agent/config.ini by changing as below:
--------------------------------------------------
## It should not normally be necessary to modify these.
# Port that the CM agent should listen on.
listening_port=9001
-------------------------------------------------
and then restart the cloudera-scm-agent service by command:
service cloudera-scm-agent restart
To verify this port is not activated for other sshd service check Ports opened in /etc/ssh/sshd_config.
I hope this resolution will work for others too.
Cheers, Ankit Gupta
来源：https://stackoverflow.com/questions/22088053/why-i-am-getting-this-error-installation-failed-failed-to-receive-heartbeat-fr