Zhen Wang created SPARK-58836:
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Summary: Thread dump flame graph resources return 404 behind a web
proxy
Key: SPARK-58836
URL: https://issues.apache.org/jira/browse/SPARK-58836
Project: Spark
Issue Type: Bug
Components: Web UI
Affects Versions: 4.2.0, 5.0.0
Reporter: Zhen Wang
When the Spark Web UI is accessed through a web proxy, opening the driver or
executor **Thread Dump** panel from the Executors page fails to load the flame
graph static resources.
For example, when the Spark UI is accessed at:
/proxy/application_1769588986968_67458200/
the thread dump panel requests the following URL:
/static/d3-flamegraph.css
This returns HTTP 404 because the proxy base path is missing. The expected URL
is:
/proxy/application_1769588986968_67458200/static/d3-flamegraph.css
The same issue affects `d3.min.js` and `d3-flamegraph.min.js`.
!image-2026-08-18-14-15-44-975.png!
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