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https://issues.apache.org/jira/browse/SPARK-21715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-21715:
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Assignee: (was: Apache Spark)
> History Server should not respond history page html content multiple times
> for only one http request
> ----------------------------------------------------------------------------------------------------
>
> Key: SPARK-21715
> URL: https://issues.apache.org/jira/browse/SPARK-21715
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.1.0, 2.2.0
> Reporter: Ye Zhou
> Priority: Minor
> Attachments: Performance.png, ResponseContent.png
>
>
> UI looks fine for the home page. But we check the performance for each
> individual components, we found that there are three picture downloading
> requests which takes much longer time than expected: favicon.ico,
> sort_both.png, sort_desc.png.
> These are the list of the request address: http://hostname:port/favicon.ico,
> http://hostname:port/images/sort_both.png,
> http://hostname:port/images/sort_desc.png. Later if user clicks on the head
> of the table to sort the column, another request for
> http://hostname:port/images/sort_asc.png will be sent.
> Browsers will send request for favicon.ico in default. And all these three
> sort_xxx.png are the default behavior in dataTables jQuery plugin.
> Spark history server will start several handlers to handle http request. But
> none of these requests are getting correctly handled and they are all
> triggering the history server to respond the history page html content. As we
> can find from the screenshot, the response data type are all "text/html".
> To solve this problem, We need to download those images dir from here:
> https://github.com/DataTables/Plugins/tree/master/integration/bootstrap/images.
> Put the folder under "core/src/main/resources/org/apache/spark/ui/static/".
> We also need to modify the dataTables.bootstrap.css to get the correct images
> location. For favicon.ico downloading request, we need to add one line in the
> html header to disable the downloading.
> I can post a pull request if this is the correct way to fix this. I have
> tried it which works fine.
> !https://issues.apache.org/jira/secure/attachment/12881534/Performance.png!
> !https://issues.apache.org/jira/secure/attachment/12881535/ResponseContent.png!
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