Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/15085#discussion_r78674369
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -857,9 +862,11 @@ private[spark] class BlockManager(
val startTimeMs = System.currentTimeMillis
var blockWasSuccessfullyStored: Boolean = false
+ var exceptionWasThrown: Boolean = true
val result: Option[T] = try {
val res = putBody(putBlockInfo)
blockWasSuccessfullyStored = res.isEmpty
+ exceptionWasThrown = false
res
} finally {
if (blockWasSuccessfullyStored) {
--- End diff --
One concern with using a `catch` here is handling of
`InterruptedException`: if we use `case NonFatal(e)` that won't match
`InterruptedException` and we'll miss out on cleanup following that. If we
catch `Throwable`, on the other hand, then I think that we'll end up clearing
the `isInterrupted` bit for `InterruptedException`s and it'll be awkward to
match and re-set it when rethrowing. Therefore I'd like to keep the
exception-handling case in the `finally` block with a simple check to see if we
entered that block via an error case.
Note that I've seen this same exception-handling idiom used in Java code,
where code that catches and re-throws `Throwable` won't compile in older Java
versions because of the checked exception-handling (I think that newer versions
are a bit more permissive about throwing exceptions from a `catch` block).
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