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https://issues.apache.org/jira/browse/KNOX-3171?focusedWorklogId=976244&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-976244
]
ASF GitHub Bot logged work on KNOX-3171:
----------------------------------------
Author: ASF GitHub Bot
Created on: 25/Jul/25 11:32
Start Date: 25/Jul/25 11:32
Worklog Time Spent: 10m
Work Description: Kimahriman opened a new pull request, #1066:
URL: https://github.com/apache/knox/pull/1066
(It is very **important** that you created an Apache Knox JIRA for this
change and that the PR title/commit message includes the Apache Knox JIRA ID!)
## What changes were proposed in this pull request?
Remove trailing slash is YARN proxy rewrite rules which now cause issues
with Spark 4.0.0 UI. I don't see any other rewrite rules for YARN including a
trailing slash, so not sure why the proxy ones ever needed to.
(Please fill in changes proposed in this fix)
## How was this patch tested?
Manual tested locally.
Before:
<img width="1728" height="893" alt="Screenshot 2025-07-25 at 7 23 42 AM"
src="https://github.com/user-attachments/assets/e819bf51-db3a-431c-914a-1572bf0d286a";
/>
After:
<img width="1728" height="893" alt="Screenshot 2025-07-25 at 7 23 42 AM"
src="https://github.com/user-attachments/assets/9c40eae3-ce87-4779-8085-db6b246e21fa";
/>
Please review [Knox Contributing
Process](https://cwiki.apache.org/confluence/display/KNOX/Contribution+Process#ContributionProcess-GithubWorkflow)
before opening a pull request.
Issue Time Tracking
-------------------
Worklog Id: (was: 976244)
Remaining Estimate: 0h
Time Spent: 10m
> YARN proxy rewrite causes issues for Spark 4.0.0 UI
> ---------------------------------------------------
>
> Key: KNOX-3171
> URL: https://issues.apache.org/jira/browse/KNOX-3171
> Project: Apache Knox
> Issue Type: Bug
> Reporter: Adam Binford
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Spark UI is not fully functional when viewed through the YARN UI proxy due to
> the rewrite rules for proxying adding a trailing slash. Somehow this seems to
> not have caused a problem until now, but there is a new inline script that
> does not function correctly
> Original code:
> ```
> <div class="col-12">
> <div id="active-executors"></div>
> <script type="module"
> src="/proxy/application_1753390029632_0001/static/utils.js"></script>
> <script type="module"
> src="/proxy/application_1753390029632_0001/static/executorspage.js"></script>
> <script type="module">
> import {setThreadDumpEnabled,
> setHeapHistogramEnabled} from
> "/proxy/application_1753390029632_0001/static/executorspage.js";
> setThreadDumpEnabled(true);
> setHeapHistogramEnabled(true)
> </script>
> </div>
> ```
> Knox rewrite:
> ```
> <div class="col-12">
> <div id="active-executors"></div>
> <script type="module"
> src="https://localhost:8443/gateway/sandbox/yarn/proxy/application_1753390029632_0001/static/utils.js/";></script>
> <script type="module"
> src="https://localhost:8443/gateway/sandbox/yarn/proxy/application_1753390029632_0001/static/executorspage.js/";></script>
> <script type="module">
> import {setThreadDumpEnabled, setHeapHistogramEnabled} from
> "https://localhost:8443/gateway/sandbox/yarn/proxy/application_1753390029632_0001/static/executorspage.js";;
> setThreadDumpEnabled(true);
> setHeapHistogramEnabled(true);
> /</script>
> </div>
> ```
> This leads to two errors in the browser console:
> ```
> GET
> https://localhost:8443/gateway/sandbox/yarn/proxy/application_1753390683205_0007/static/executorspage.js/utils.js
> net::ERR_ABORTED 404 (Not Found)Understand this error
> executors/:62 Uncaught SyntaxError: Unexpected end of input (at
> executors/:62:2)
> ```
> The first is because `executorspage.js` has a import from `./utils.js`, so
> some part of that import gets messed up with the trailing slash. The second
> is because of the `/` right before the `</script>` tag that the rewrite rule
> seems to erroneously add. Either way the trailing slashes don't really make
> sense and shouldn't be needed.
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