question Re: Unable to issue query: could not connect to the Host Monitor in Archives of Support Questions (Read Only)

Unable to issue query: could not connect to the Host Monitor

langwu — Fri, 16 Sep 2022 08:58:54 GMT

Hello, I installed the cloudera manager,then I install HDFS through cloudera manager. Wnen I want to see the cluster cpu, disk IO, Network IO status, the problem occur.

How can I solve this problem,thank you

Re: Unable to issue query: could not connect to the Host Monitor

langwu — Wed, 14 May 2014 09:12:12 GMT

Re: Unable to issue query: could not connect to the Host Monitor

Darren — Wed, 14 May 2014 16:45:55 GMT

Does your Management Service exist? Does the Host Monitor Role in the Management Service exist? Is it started? Is there an error in the Host Monitor logs?

Normally the initial wizard in CM will guide you through setting up the Management service. Did you skip this wizard?

Re: Unable to issue query: could not connect to the Host Monitor

langwu — Thu, 15 May 2014 02:34:21 GMT

Thank you! yes, I do not install Management service, thank you

Re: Unable to issue query: could not connect to the Host Monitor

mukul — Thu, 26 Jun 2014 18:22:39 GMT

How did you install the missing service / component ? I am facing the same issue.

Thanks ,

Mukul

Re: Unable to issue query: could not connect to the Host Monitor

langwu — Fri, 27 Jun 2014 02:06:23 GMT

I do not install the Management service, after install it, I solved my problem. hope to help you

Re: Unable to issue query: could not connect to the Host Monitor

sandy4ual — Mon, 16 Mar 2015 20:36:02 GMT

As you Mentioned I have skipped the wizard because I lost the connection in between.

Can you please tell me how can i install it.

Thanks

Re: Unable to issue query: could not connect to the Host Monitor

sandy4ual — Mon, 16 Mar 2015 20:37:42 GMT

Can someone suggest how do we install the management service using CDM.

Thanks

Re: Unable to issue query: could not connect to the Host Monitor

Darren — Mon, 16 Mar 2015 21:21:08 GMT

From the home page, there should be a button in the upper right of your screen to add the management service. It only appears if no management service exists.

Re: Unable to issue query: could not connect to the Host Monitor

sandy4ual — Mon, 16 Mar 2015 21:42:14 GMT

Thank You,

I have added the Management service but it still see the error in charts:

"Unable to issue query: the Host Monitor is not running"

I even restarted the cluseter and all the services but still its not running.

Thanks

Re: Unable to issue query: could not connect to the Host Monitor

Darren — Mon, 16 Mar 2015 21:43:09 GMT

If you click on the Host Monitor and look at the role logs, stderr logs, and stdout logs, do they say why it failed to start?

Re: Unable to issue query: could not connect to the Host Monitor

sandy4ual — Mon, 16 Mar 2015 21:57:29 GMT

Thank You So much..it worked now

Re: Unable to issue query: could not connect to the Host Monitor

slmingol — Tue, 08 Sep 2015 19:38:49 GMT

I too ran into this issue. I manually started the Host Monitor which allowed that service to start, however I was still plagued with the error message "Cannot have empty version string segment" each time I'd login to the dashboard. Will attempt to do a uninstall and reinstall to see if it clears it up.

UPDATE

A uninstall/re-install seems to have cleared things up.

Unable to issue query: could not connect to the Host Monitor

abhibavdhan — Wed, 11 Oct 2017 17:00:09 GMT

I tried to Start Host monitor service it is not working.Also I tried to Restart Host monitor service.Also I am getting error for below command I am getting below error.
Connection aborted because of exception :Command Time Out after 150 seconds and Role is starting in red line.

I look at the role logs, stderr logs, and stdout logs -
Error when communicating with server
NullPointer Exception

Query error for following

Cluster CPU
Cluster Network I/O
Cluster Disk I/O