question Re: "Host Metrics" section shows "No Data Available" in Archives of Support Questions (Read Only)

"Host Metrics" section shows "No Data Available"

pradeep_tp — Fri, 05 Feb 2016 22:35:04 GMT

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.

Re: "Host Metrics" section shows "No Data Available"

nsabharwal — Fri, 05 Feb 2016 22:49:12 GMT

@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_set_up_an_internet_proxy_server_for_ambari.html

Re: "Host Metrics" section shows "No Data Available"

pradeep_tp — Fri, 05 Feb 2016 23:44:43 GMT

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.

Re: "Host Metrics" section shows "No Data Available"

nsabharwal — Fri, 05 Feb 2016 23:44:50 GMT

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

Re: "Host Metrics" section shows "No Data Available"

nsabharwal — Fri, 05 Feb 2016 23:47:53 GMT

@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.

Re: "Host Metrics" section shows "No Data Available"

pradeep_tp — Fri, 05 Feb 2016 23:48:07 GMT

@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.

Re: "Host Metrics" section shows "No Data Available"

nsabharwal — Fri, 05 Feb 2016 23:50:41 GMT

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

Re: "Host Metrics" section shows "No Data Available"

pradeep_tp — Fri, 05 Feb 2016 23:51:33 GMT

@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..

Re: "Host Metrics" section shows "No Data Available"

nsabharwal — Fri, 05 Feb 2016 23:57:47 GMT

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

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

Re: "Host Metrics" section shows "No Data Available"

rakeshbca — Thu, 12 Apr 2018 21:13:21 GMT

Is ambar-server, agent needs to restart all servers alongwith Ambari server???

Secondly i am still curious proxy path

rwx------. 1 root root 1383 Sep 16 2016 ambari-env.sh -rwx------. 1 root root 1345 Sep 16 2016 ambari-sudo.sh drwxr-xr-x. 4 root root 4096 Apr 11 05:47 data -rwx------. 1 root root 7206 Sep 16 2016 install-helper.sh drwx------. 3 root root 4096 Apr 11 06:00 keys drwxr-xr-x. 11 root root 4096 Apr 11 05:55 resources

Re: "Host Metrics" section shows "No Data Available"

ravikanth_durga — Fri, 13 Jul 2018 05:09:46 GMT

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.

Re: "Host Metrics" section shows "No Data Available"

PKROY — Mon, 28 Jun 2021 04:38:18 GMT

Hello @pradeep_tp,

Please restart Ambari Metrics from Ambari. Sometimes due to cache/network issues also metrics get unable but restart sometimes fixes the issue.

Please try and let me know how it goes!

//BR

Roy