GitHub user dosubot[bot] added a comment to the discussion: ChunkLoadError when
generating dashboard screenshot using
/api/v1/dashboard/{pk}/cache_dashboard_screenshot/
<!-- Answer -->
This ChunkLoadError almost always means the Playwright/Chromium worker can't
load a dynamic JS chunk because the asset URL it's trying to fetch is wrong or
unreachable from inside the worker container. In Superset, all dynamic chunk
URLs are built using a prefix from the bootstrap data embedded in the HTML,
which is set by your APPLICATION_ROOT and STATIC_ASSETS_PREFIX config. If these
don't match the actual public path Playwright uses to reach your assets in
production, you'll get exactly this error—even if the dashboard loads fine in
your browser.
To fix this, make sure that:
- WEBDRIVER_BASEURL, APPLICATION_ROOT, and STATIC_ASSETS_PREFIX all point to
the same public URL and path that Playwright uses to access your Superset
instance and its static assets.
- The Playwright/worker container can reach all static assets (including chunk
files) at the URLs generated by the frontend. You can exec into the worker
container and try to curl or wget a chunk file (e.g.,
`/static/assets/683.chunk.js`) using the exact URL from the browser's network
tab.
- There are no proxy, CDN, or CORS issues blocking asset requests from the
worker container.
In local dev, asset prefixes are often relative and accessible, but in
production, they must match the actual CDN/proxy path exposed to Playwright.
Any mismatch (hostnames, missing slashes, or different subpaths) will cause
this error, even if everything looks fine in your browser because your browser
and the worker may resolve URLs differently. The key is that the runtime prefix
for dynamic chunk loads must match the URL space Playwright can reach. See [how
the asset prefix is set in the
frontend](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/public-path.ts#L19-L22)
and [how it's derived from bootstrap
data](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/utils/getBootstrapData.ts#L24-L54).
If you align these configs and verify asset accessibility from the worker, the
ChunkLoadError should disappear.
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[](https://app.dosu.dev/a28d3c7e-a9d3-459e-9fb6-3a6f9ff4f357/ask?utm_source=github) [](https://cursor.com/link/prompt?text=This%20ChunkLoadError%20almost%20always%20means%20the%20Playwright/Chromium%20worker%20can%27t%20load%20a%20dynamic%20JS%20chunk%20because%20the%20asset%20URL%20it%27s%20trying%20to%20fetch%20is%20wrong%20or%20unreachable%20from%20inside%20the%20worker%20container.%20In%20Superset%2C%20all%20dynamic%20chunk%20URLs%20are%20built%20using%20a%20prefix%20from%20the%20bootstrap%20data%20embedded%20in%20the%20HTML%2C%20which%20is%20set%20by%20your%20APPLICATION_ROOT%20and%20STATIC_ASSETS_PREFIX%20config.%20If%20these%20don%27t%20match%20the%20actual%20public%20path%20Playwright%20uses%20to%20reach%20your%20assets%20in%20production%2C%20you%27ll%20get%20exactly%20this%20error%E2%80%94even%20if%20the%20dashboard%20loads%20fine%20in%20your%20browser.%0A%0ATo%2
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Playwright.%20Any%20mismatch%20%28hostnames%2C%20missing%20slashes%2C%20or%20different%20subpaths%29%20will%20cause%20this%20error%2C%20even%20if%20everything%20looks%20fine%20in%20your%20browser%20because%20your%20browser%20and%20the%20worker%20may%20resolve%20URLs%20differently.%20The%20key%20is%20that%20the%20runtime%20prefix%20for%20dynamic%20chunk%20loads%20must%20match%20the%20URL%20space%20Playwright%20can%20reach.%20See%20%5Bhow%20the%20asset%20prefix%20is%20set%20in%20the%20frontend%5D%28https%3A//github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/public-path.ts%23L19-L22%29%20and%20%5Bhow%20it%27s%20derived%20from%20bootstrap%20data%5D%28https%3A//github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/utils/getBootstrapData.ts%23L24-L54%29.%0A%0AIf%20you%20align%20these%20configs%20and%20verify%20asset%20accessibility%20from%20the%20worker%2C%20the%20ChunkLoadError%20should%20disappear.)&nb
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GitHub link:
https://github.com/apache/superset/discussions/37062#discussioncomment-15477908
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