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From "Vivek Ratnavel Subramanian (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-19907) On certain actions, there's no feedback from the UI when API takes a long time to respond - not reassuring and the user is encouraged to keep triggering the same heavy action to make the problem worse
Date Wed, 08 Feb 2017 02:09:42 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-19907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vivek Ratnavel Subramanian updated AMBARI-19907:
------------------------------------------------
    Status: Patch Available  (was: In Progress)

> On certain actions, there's no feedback from the UI when API takes a long time to respond
- not reassuring and the user is encouraged to keep triggering the same heavy action to make
the problem worse
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-19907
>                 URL: https://issues.apache.org/jira/browse/AMBARI-19907
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-web
>    Affects Versions: 2.5.0
>            Reporter: Vivek Ratnavel Subramanian
>            Assignee: Vivek Ratnavel Subramanian
>            Priority: Critical
>             Fix For: 2.5.0
>
>         Attachments: AMBARI-19907.v0.branch-2.5.patch
>
>
> On a big cluster, it takes the server a long time to process the API request for certain
operations, like "Stop All", "Start All", etc. 
> On a small cluster, the "background operations" popup appears within a few seconds to
acknowledge to the user that the server is working on handling the request.
> However, when the cluster gets bigger and the request API takes the server much longer
(e.g., on a 1000-node cluster, it took ~35 seconds), there's no indication on the UI that
the server received the request.  This is not reassuring to the user and the user is tempted
to keep re-triggering the action and overwhelming the server.
> This problem is not just for "Start All", "Stop All".  This problem actually happens
for "Stop" and "Start" of a single service as well (and likely other places, like Hosts /
Host Detail pages.)  On the 1000-node cluster, this takes about 6-7 seconds, enough to make
the user wonder if the request got to the server or not.



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