Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/2691#issuecomment-68088737
Hey @mmalohlava, what if we exposed a mechanism for running a code block
once on each active executor? This is something that has been requested already
for other reasons in Spark, and it's a somewhat narrower API to expose. Then
once you are about to run your application you could just invoke some static
initialization on each executor using this mechanism.
For instance:
```
/** Invoke function f() on each executor and return the result of f. */
sc.invokeOnEachExecutor(f => T): Map[String, T]
```
You could implement this using a custom (private) RDD type that creates
tasks for each executor with the location preference.
Would that work?
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