Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/16147
It seems some tests are being failed in some cases when running executor as
process (e.g. `local-cluster`). In this case, it fails because simply the
classpath is too long
(https://gist.github.com/HyukjinKwon/5bc81061c250d4af5a180869b59d42ea) and I
thought the workaround is to shorten this by, for example, installing right
under C:\ and etc on Windows.
If we build and run tests on Windows, I guess we would easilly meet the
test failures and I persuaded myself this might be the limitation of OS and
therefore the tests should be disabled.
I am happy to figure out to shortening the classpath via using, for
example, wildcard or related path and etc if you think this is something to be
fixed.
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