Ye Zhou created SPARK-21715:
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Summary: History Server respondes 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: Bug
Components: Spark Core
Affects Versions: 2.2.0, 2.1.0, 2.3.0
Reporter: Ye Zhou
Priority: Minor
Fix For: 2.3.0
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.
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