Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/2871#discussion_r19455404
--- Diff:
core/src/main/scala/org/apache/spark/broadcast/TorrentBroadcast.scala ---
@@ -157,14 +161,12 @@ private[spark] class TorrentBroadcast[T:
ClassTag](obj: T, id: Long)
out.defaultWriteObject()
}
- /** Used by the JVM when deserializing this object. */
- private def readObject(in: ObjectInputStream): Unit =
Utils.tryOrIOException {
- in.defaultReadObject()
+ private def readBroadcastBlock(): T = Utils.tryOrIOException {
--- End diff --
I don't think that `Utils.tryOrIOException` is _strictly_ necessary here,
since this method will no longer be called from `readObject()`, so we won't
have to worry about any exceptions that it throws being swallowed inside of a
Java deserializer. I added the `tryOrIOException` blocks as part of a general
campaign to combat error-reporting issues in our custom Externalizable /
Serializable classes. It's fine to use this here, though, if you want to
restrict the range of possible exceptions that can be thrown when calling
`getValue()`.
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