falaki commented on a change in pull request #26429: [SPARK-29777][SparkR]
SparkR::cleanClosure aggressively removes a function required by user function
URL: https://github.com/apache/spark/pull/26429#discussion_r346133031
##########
File path: R/pkg/R/utils.R
##########
@@ -546,8 +546,11 @@ processClosure <- function(node, oldEnv, defVars,
checkedFuncs, newEnv) {
ifelse(identical(func, obj), TRUE, FALSE)
})
if (sum(found) > 0) {
- # If function has been examined, ignore.
- break
+ # If function has been examined
+ if (identical(parent.env(environment(funcList[found][[1]])),
func.env)) {
Review comment:
Yes, but note that such a function will get `stack overflow` during
execution anyway. So the code is not runnable. SparkR does not expose
`cleanClosure`. If user passes your function, `a()` to `dapply()`, `gapply()`
or `spark.lapply()` they will get `Error: node stack overflow` on the workers
anyway.
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