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https://issues.apache.org/jira/browse/AMBARI-7880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14177662#comment-14177662
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Srimanth Gunturi commented on AMBARI-7880:
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Script execution takes about 20 secs and that is why:
https://github.com/apache/ambari/blob/trunk/ambari-server/src/main/resources/stacks/stack_advisor.py#L415
To provide host-groups mapping in response we resolve fqdn for each host. So in
any case we have 400 calls to {{socket.getfqdn}} after component-layout
processing (when we prepare response).
> /recommendations work too slow for 400 node cluster
> ---------------------------------------------------
>
> Key: AMBARI-7880
> URL: https://issues.apache.org/jira/browse/AMBARI-7880
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 1.7.0
> Reporter: Srimanth Gunturi
> Assignee: Srimanth Gunturi
> Fix For: 1.7.0
>
>
> Request {{POST /api/v1/stacks/HDP/versions/2.2/recommendations HTTP/1.1}}
> takes 6-7 sec for 400 node cluster.
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