"Host Metrics" section shows "No Data Available"

[#1]

I have a HDP cluster (CentOS), that I installed using Ambari (non-sandbox). This cluster has four nodes. When I use the Ambari Dashboard to view the details, I can see various details such as "HDFS Disk usage" etc. However, when I go to the host details page, I see blank boxes, with the title "No Data Available" . This is happening for all the hosts including the master node. The "Ambari Metrics" monitor is also running fine (green). I have not been able to identify the cause of this issue. Can anyone help me fix this issue?issue.png

. I am attaching the screen shot of the dashboard that displays the details of the node.

[#2 · Accepted solution]

@Pradeep kumar

It happens because of host name resolution. See this http://docs.hortonworks.com/HDPDocuments/Ambari-2.1.2.1/bk_ambari_reference_guide/content/_how_to_se...

[#3]

@Pradeep kumar I noticed that you updated the thread and accepted answer as resolved...Did it work?

[#4]

@Neeraj Sabharwal Please see the answer I posted. I thought the proxy server was the issue, but then I saw that there was an error message for the proxy line, that I took from your URL. So I removed this line and restarted ambari servers and agents on all the nodes. After that I started seeing the details. Sorry I had accepted your answer and then unaccepted it.

[#5]

@Pradeep kumar Thanks for sharing the final update. It will help the users in future.

[#6]

If I don't use the proxy settings in ambari-env.sh, the metrics show up correctly, but there are whole bunch of alerts about web UIs not being accessible.

If I use proxy settings in ambari-env.sh, then the metrics don't show up, it shows data unavailable.

[#7]

I think I had jumped the gun here. I didn't notice that the command 'Dhttp.proxyHost=<yourProxyHost>-Dhttp.proxyPort=<yourProxyPort>' is not being identified by ambari server as valid command. So I deleted this line from the .env file and then restarted ambari server, restarted ambari agent on master server, and restarted ambari agent service on all the other hosts. After this I see that the host page for all the hosts have started showing the graphs!!!. I am not sure what did the trick, but it seems that after I fixed the ntpd issue, I should have tried restarting the ambari-server and ambari-agents.

[#8]

@Pradeep kumar I am not sure but I will accept this as answer. You may want to rollback the proxy setting and see if it works or not. In the past, proxy helped to fix the issue.

[#9]

@Neeraj Sabharwal I will accept your answer. I have rolled back the proxy settings. I think it was the ambari-servers and amabri agent restart that worked..

[#10]

@Pradeep kumar Now, I need to reproduce to find the fix 🙂

I used the proxy settings to fix the issue. Glad its fixed