HyukjinKwon opened a new pull request, #38570:
URL: https://github.com/apache/spark/pull/38570
### What changes were proposed in this pull request?
This PR proposes to keep the `R_LIBS_SITE` as was. It has been changed from
R 4.2.
### Why are the changes needed?
To keep the behaviour same as the previous. This especially affects the
external libraries installed in SparkR worker sides. Especially this can break
the user-installed libraries. See the paths below:
**R 4.2**
```
# R
> Sys.getenv("R_LIBS_SITE")
[1]
"/usr/local/lib/R/site-library/:/usr/lib/R/site-library:/usr/lib/R/library'"
# R --vanilla
> Sys.getenv("R_LIBS_SITE")
[1] "/usr/lib/R/site-library"
```
**R 4.1**
```
# R
> Sys.getenv("R_LIBS_SITE")
[1]
"/usr/local/lib/R/site-library:/usr/lib/R/site-library:/usr/lib/R/library"
# R --vanilla
> Sys.getenv("R_LIBS_SITE")
[1]
"/usr/local/lib/R/site-library:/usr/lib/R/site-library:/usr/lib/R/library"
```
### Does this PR introduce _any_ user-facing change?
Yes. With R 4.2, user-installed libraries won't be found in SparkR workers.
### How was this patch tested?
Manually tested, unittest added. It's difficult to add an e2e tests.
I also manually tested `getROptions` in Scala shall.
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