I want to specify a default custom CRAN mirror in R under Databricks, but adjusting the config in the Rprofile.site file seems not to bet recognized at all.
I have already read the official Microsoft documentation on how to customize the R session in Databricks:
https://learn.microsoft.com/en-us/azure/databricks/sparkr/#r-session-customization
The value of R_HOME is /usr/lib/R
So, I have adjusted my Databricks cluster-scoped init script which adds following lines to the /usr/lib/R/etc/Rprofile.site file:
local({
options(repos = c(CRAN = "<my_custom_cran_url>"))
})
This works perfectly fine.
However if I run getOption("repos") within an R Notebook I get following output:
Cloud MRAN
"https://cloud.r-project.org/" "https://cran.microsoft.com/"
These are still the initial default CRAN settings.
This means, that they weren't overwritten by my custom CRAN URL in the Rprofile.site file.
If I run the lines mentioned above (local({...repos...})) in an R Notebook, the getOption("repos") will output the desired entry of:
CRAN
"<my_custom_cran_url>"
Maybe the file /usr/lib/R/etc/Rprofile.site is not executed at all although Microsoft is saying so?
Does anyone have a suggestion?
The Databricks Runtime version: 12.2 LTS (includes Apache Spark 3.3.2, Scala 2.12)
This issue is fixed in DBR 15
#'_CleanRShell*.r'
# Split the environment variable by ',' (changed from ':' to ',' in DBR 15.0 to support the
# user:[email protected] format for private repos)
options(
repos = strsplit(
Sys.getenv("DATABRICKS_DEFAULT_R_REPOS"), ","
)[[1]]