Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/17274#discussion_r106237140
--- Diff: R/pkg/inst/tests/testthat/test_context.R ---
@@ -177,6 +177,13 @@ test_that("add and get file to be downloaded with
Spark job on every node", {
spark.addFile(path)
download_path <- spark.getSparkFiles(filename)
expect_equal(readLines(download_path), words)
+
+ # Test spark.getSparkFiles works well on executors.
+ seq <- seq(from = 1, to = 10, length.out = 5)
+ f <- function(seq) { readLines(spark.getSparkFiles(filename)) }
+ results <- spark.lapply(seq, f)
+ for (i in 1:5) { expect_equal(results[[i]], words) }
+
--- End diff --
hmm, the test should be run just like `spark-submit test.R` in local mode.
just to isolate this further, what if you change the test to run with
```
f <- function(seq) { "blah" }
```
?
Or then
```
f <- function(seq) { readLines("/tmp/somelocalfile") }
```
?
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