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https://issues.apache.org/jira/browse/AMBARI-3600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13807958#comment-13807958
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Nate Cole commented on AMBARI-3600:
-----------------------------------
* ConfigHelper
** Will update comment to be more clear
** hasPropertyFor() - This is required because we need to check to see if a
property is stale for ANY OTHER service than the SCH that we are checking,
because the OTHER one will be considered stale. That check is designed to look
forcustom properties that are assigned to a type but are not defined as part of
the stack. For example, if you assign a value to core-site that is undefined
in any stack, any service relying on core-site will be considered stale.
** findChangedKeys() - it's ok for overlap in this case, because even
overlapping (two properties defined in two different services) means it's stale.
** The method is (more or less) directly tested in
ServiceComponentHostTest.testStaleConfigs() as you mentioned.
* StackServiceResponse
** TT/JT - the stack service response only indicates what configs a service
defines, not the relationship of components to the config. Any stale config
value will make both TT and JT stale.
* ServiceInfo
** Will add synchronization to the method, but note that ServiceInfo is
effectively singleton-per-stack, and no other synch activity happens around
stacks as it is today.
* testStaleConfigs() addresses the SCHTest you mentioned. Will switch to 2.0.6
and verify.
> Add stale_configs attribute to a host_component response
> --------------------------------------------------------
>
> Key: AMBARI-3600
> URL: https://issues.apache.org/jira/browse/AMBARI-3600
> Project: Ambari
> Issue Type: Task
> Reporter: Nate Cole
> Assignee: Nate Cole
> Fix For: 1.4.2
>
> Attachments: AMBARI-3600.patch
>
>
> Add an intelligent check to determine if the configs are stale on a
> host_component. The response will have like the following:
> {noformat}
> {
> "href" :
> "http://localhost:8080/api/v1/clusters/c1/hosts/h1/host_components/DATANODE?fields=HostRoles/stale_configs";,
> "HostRoles" : {
> "cluster_name" : "c1",
> "component_name" : "DATANODE",
> "host_name" : "h1",
> "stale_configs" : true
> }
> }
> {noformat}
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