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https://issues.apache.org/jira/browse/KNOX-3171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adam Binford resolved KNOX-3171.
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Fix Version/s: 3.0.0
Resolution: Fixed
Fixed by https://github.com/apache/knox/pull/1066
> 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
> Fix For: 3.0.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> Spark UI is not fully functional in 4.0.0 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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