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https://issues.apache.org/jira/browse/AMBARI-19540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vivek Ratnavel Subramanian updated AMBARI-19540:
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Attachment: AMBARI-19540.v0.patch
> Possibly too frequent calls to stack advisor as user changes sliders
> --------------------------------------------------------------------
>
> Key: AMBARI-19540
> URL: https://issues.apache.org/jira/browse/AMBARI-19540
> Project: Ambari
> Issue Type: Bug
> Components: ambari-web
> Affects Versions: 2.5.0
> Reporter: Vivek Ratnavel Subramanian
> Assignee: Vivek Ratnavel Subramanian
> Fix For: 2.5.0
>
> Attachments: AMBARI-19540.v0.patch
>
>
> As you can see 3 calls are made while changing from 1024 to 2048 and
> similarly 3 calls when coming back to 1024.
> Beyond performance concern, multiple calls have a functional issue. The call
> includes previous value of the changed property - see the values. I would
> have expected the old value to be the value that was the original/saved
> value. However, it is wherever UI makes the stack advisor calls.
> [root@smq1-1 stack-recommendations]# find . -name services.json | xargs grep
> -A 3 changed
> ./55/services.json: "changed-configurations" : [ {
> ./55/services.json- "type" : "yarn-site",
> ./55/services.json- "name" : "yarn.scheduler.minimum-allocation-mb",
> ./55/services.json- "old_value" : "1024"
> ./56/services.json: "changed-configurations" : [ {
> ./56/services.json- "type" : "yarn-site",
> ./56/services.json- "name" : "yarn.scheduler.minimum-allocation-mb",
> ./56/services.json- "old_value" : "1280"
> ./57/services.json: "changed-configurations" : [ {
> ./57/services.json- "type" : "yarn-site",
> ./57/services.json- "name" : "yarn.scheduler.minimum-allocation-mb",
> ./57/services.json- "old_value" : "1792"
> ./58/services.json: "changed-configurations" : [ {
> ./58/services.json- "type" : "yarn-site",
> ./58/services.json- "name" : "yarn.scheduler.minimum-allocation-mb",
> ./58/services.json- "old_value" : "2048"
> ./59/services.json: "changed-configurations" : [ {
> ./59/services.json- "type" : "yarn-site",
> ./59/services.json- "name" : "yarn.scheduler.minimum-allocation-mb",
> ./59/services.json- "old_value" : "1792"
> ./60/services.json: "changed-configurations" : [ {
> ./60/services.json- "type" : "yarn-site",
> ./60/services.json- "name" : "yarn.scheduler.minimum-allocation-mb",
> ./60/services.json- "old_value" : "1280"
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