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https://issues.apache.org/jira/browse/AMBARI-2254?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom Beerbower updated AMBARI-2254:
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Attachment: AMBARI-2254.patch
> Reduce number of requests when querying for subtasks
> ----------------------------------------------------
>
> Key: AMBARI-2254
> URL: https://issues.apache.org/jira/browse/AMBARI-2254
> Project: Ambari
> Issue Type: Bug
> Reporter: Tom Beerbower
> Assignee: Tom Beerbower
> Fix For: 1.5.0
>
> Attachments: AMBARI-2254.patch
>
>
> A query like ...
> /services?fields=components/ServiceComponentInfo,components/host_components,components/host_components/HostRoles
> ... will create multiple requests for resources through the
> ClusterController. It looks like ClusterController gets called once for all
> the services, then once for all of the components under each service, then
> once for all the host_components under each component under each service. So,
> if there are 10 services that each have 10 components, there will be 100
> calls to the ClusterController to get host components, plus 10 calls for the
> components and another for the services. We should be able to optimize this
> down to 3 calls... 1 for the services, 1 for the components and 1 for the
> host_components.
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