ccaominh commented on issue #9802:
URL: https://github.com/apache/druid/issues/9802#issuecomment-622578347
Sorry for the late response, but I'm adding some comments here in case
anyone finds this issue when trying to debug the end-to-end tests.
From the stack trace, the data loader failed during the "connect" step.
Specifically, the preview of the raw data did not appear in the web console.
When the e2e test fails, it'll dump a screen shot of the of the web console
at the time of test failure, which can be helpful for debugging. For this
particular test, the screen shot is named
`load-data-from-local-disk-screenshot.png`.
Disabling headless mode while running the tests can also be helpful for
debugging. One way of doing this is by modifying `tutorial-batch.spec.ts` to
change:
```
import { createBrowserNormal as createBrowser } from './util/playwright';
```
to
```
import { createBrowserDebug as createBrowser } from './util/playwright';
```
Once that's done, running the tests will launch a chromium instance and you
can watch all the interactions with the web console.
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