Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/16720#discussion_r98837066
--- Diff: R/pkg/vignettes/sparkr-vignettes.Rmd ---
@@ -27,6 +27,9 @@ library(SparkR)
We use default settings in which it runs in local mode. It auto downloads
Spark package in the background if no previous installation is found. For more
details about setup, see [Spark Session](#SetupSparkSession).
+```{r, include=FALSE}
+SparkR:::sparkCheckInstall()
--- End diff --
Is the Rmd file a part of the install that the users see ? I just dont want
to put in any code that people might copy-paste etc. Is it not good enough to
pass in `master=local[*]` here ?
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