kazuyukitanimura commented on a change in pull request #33721:
URL: https://github.com/apache/spark/pull/33721#discussion_r688809492
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File path: core/src/main/scala/org/apache/spark/MapOutputTracker.scala
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@@ -1335,22 +1334,23 @@ private[spark] object MapOutputTracker extends Logging {
} {
objOut.close()
}
- val arr = out.toByteArray
- if (arr.length >= minBroadcastSize) {
+ // create a nested Array so that it can handle over 2GB serialized data
+ val arr = out.toChunkedByteBuffer.getChunks().map(_.array())
+ val arrSize = out.size
+ if (arrSize >= minBroadcastSize) {
// Use broadcast instead.
// Important arr(0) is the tag == DIRECT, ignore that while
deserializing !
val bcast = broadcastManager.newBroadcast(arr, isLocal)
- // toByteArray creates copy, so we can reuse out
- out.reset()
+ val out = new ChunkedByteBufferOutputStream(chunkSize,
ByteBuffer.allocate _)
Review comment:
Good point! updated.
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