Cluster upscale from Cloudbreak failing with 'Invalid Add Hosts Template'

[#1]

Hi,

I'm trying to upscale the cluster from Cloudbreak and getting the below error:

update failed: New node(s) could not be added to the cluster. Reason com.sequenceiq.cloudbreak.service.CloudbreakServiceException: Ambari could not install services. Invalid Add Hosts Template: org.apache.ambari.server.topology.InvalidTopologyTemplateException: Must specify either host_name or host_count for hostgroup: worker

Error log from Ambari-server:

ERROR [ambari-client-thread-3771] BaseManagementHandler:67 - Bad request received: Invalid Add Hosts Template: org.apache.ambari.server.topology.InvalidTopologyTemplateException: Must specify either host_name or host_count for hostgroup: worker

I also could see the same error details from Ambari server log after enabling DEBUG Log mode.

Cloudbreak Version: 1.16.5

Ambari server version:- 2.6.0.0

Any help on the issue is appreciated!

Thanks,

Cibi

[#2]

Verify your HDP/Ambari version to see if you are running into this issue. https://issues.apache.org/jira/browse/AMBARI-22005

[#3 · Accepted solution]

Hi @Cibi Chakaravarthi,

Please use Ambari 2.5.1 as Ambari 2.6 is not working with Cloudbreak yet. This bug is resolved in Ambari 2.6.1

[#4]

Hi @mmolnar,

In the JIRA for this issue, AMBARI-22005 i could see that the issue has been resolved in Ambari 2.6.0. Anyways i have posted a comment over there to confirm the same.

Thanks,

Cibi

[#5]

Hi @Cibi Chakaravarthi,

The jira issue regarding this bug is AMBARI-22539 which is fixed in 2.6.1

[#6]

Thanks for the details @mmolnar. Appreciate your help on this.