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Posted to reviews@ambari.apache.org by Vivek Ratnavel Subramanian <vi...@gmail.com> on 2017/02/08 01:42:07 UTC

Review Request 56420: 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

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https://reviews.apache.org/r/56420/
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Review request for Ambari, Jaimin Jetly, Richard Zang, Xi Wang, and Yusaku Sako.

Bugs: AMBARI-19907
https://issues.apache.org/jira/browse/AMBARI-19907

Repository: ambari

Description
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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.

Diffs
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ambari-web/app/controllers/main/host/bulk_operations_controller.js 0e73c0c
ambari-web/app/controllers/main/host/details.js f040db5
ambari-web/app/controllers/main/service.js e434d41
ambari-web/app/controllers/main/service/item.js 6f1efd8
ambari-web/app/utils/ajax/ajax.js 2ea6113
ambari-web/app/utils/batch_scheduled_requests.js b8ae955
ambari-web/test/controllers/main/service_test.js d8c3365

Diff: https://reviews.apache.org/r/56420/diff/

Testing
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Verified Manually.
Ambari-web unit tests pass.
30312 passing (19s)
157 pending

Thanks,

Vivek Ratnavel Subramanian

Re: Review Request 56420: 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

Posted by Vivek Ratnavel Subramanian <vi...@gmail.com>.

(Updated Feb. 9, 2017, 2:52 a.m.)