Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/15915#discussion_r92123402 --- Diff: core/src/main/scala/org/apache/spark/util/io/ChunkedByteBufferOutputStream.scala --- @@ -30,9 +31,14 @@ import org.apache.spark.storage.StorageUtils * @param chunkSize size of each chunk, in bytes. */ private[spark] class ChunkedByteBufferOutputStream( - chunkSize: Int, + var chunkSize: Int, allocator: Int => ByteBuffer) - extends OutputStream { + extends OutputStream with Logging{ + + if (chunkSize < 0) { + logWarning(s"chunkSize should not be an negative value, replaced as 4MB default.") + chunkSize = 4 * 1024 * 1024 + } --- End diff -- This doesn't fix the issue, because a value > Int.MaxValue can still truncate to a (wrong) positive Int. If protecting against Long values > Int.MaxValue is the least we can do to address this problem, we should actually do that. It can't be that many call sites right?
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