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Cloudera Employee
Posts: 499
Registered: ‎07-30-2013

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

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?
New Contributor
Posts: 4
Registered: ‎03-16-2015

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

Thank You So much..it worked now

Explorer
Posts: 10
Registered: ‎09-04-2015

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

[ Edited ]

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. 

New Contributor
Posts: 3
Registered: ‎10-11-2017

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

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

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