Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/19643#discussion_r148983977
--- Diff: R/pkg/R/context.R ---
@@ -319,6 +319,27 @@ spark.addFile <- function(path, recursive = FALSE) {
invisible(callJMethod(sc, "addFile",
suppressWarnings(normalizePath(path)), recursive))
}
+#' Adds a JAR dependency for Spark tasks to be executed in the future.
+#'
+#' The \code{path} passed can be either a local file, a file in HDFS (or
other Hadoop-supported
+#' filesystems), an HTTP, HTTPS or FTP URI, or local:/path for a file on
every worker node.
--- End diff --
I think it refers the actual `local:/`:
https://github.com/apache/spark/blob/b2463fad718d25f564d62c50d587610de3d0c5bd/core/src/main/scala/org/apache/spark/SparkContext.scala#L1838
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